2013

Permanent URI for this collectionhttps://repository.iuls.ro/handle/20.500.12811/1765

Browse

Now showing 1 - 20 of 38

listelement.badge.access-status Open Access ,
The communities structure of invertebrate fauna from rape and alfalfa crops (Singureni, Giurgiu county, Romania)
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-03-22) Fiera, Cristina; Purice, Dorina; Maican, Sanda
The present study has been conducted under a bilateral project between Romania and Republic of Moldova, focusing on knowledge of the invertebrates from rape (Brassica napus L.) and alfalfa crops (Medicago sativa L.) from Singureni (Giurgiu County, Southern Romania). The communities structure of invertebrates fauna in term of species composition and numerical abundance were analyzed. In total, 15 species of Collembola from seven families and 38 species of Coleoptera from 17 families were identified. Entomobrya handschini, Lepidocyrtus paradoxus, Isotoma anglicana were abundant in the alfalfa crop and Hemisotoma thermophyla, Protaphorura sakatoi, Orchesella flavescens (Collembola) were abundant in the rape culture. From Coleoptera Order, Dermestes murinus, Brachinus crepitans and Epicometis hirta were dominant in the rape crop. Coccinella septempunctata and Gonioctena fornicata were dominant in the alfalfa. Also, another 385 specimens from different taxonomic groups (Heteroptera, Homoptera, Diptera, Hymenoptera, Thysanoptera, Orthoptera and Araneae) were collected using sweep nets. Some crop pests invertebrates were indicated and the beneficial predators were also revealed.
listelement.badge.access-status Open Access ,
Structure, dynamics and abundance of coleoptera species in sweet and sour cherry plantations from Iaşi and Vaslui counties, Romania
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-20) Tălmaciu, Nela; Tălmaciu, Mihai; Herea, Monica
The paper brings contributions to the knowledge of fauna of beetles (Coleoptera) in some ecosystems of sweet and sour cherry from Iaşi and Vaslui counties, Romania. For catching insects from orchards two methods have been used: the sampling with the Barber soil traps method, six traps placed in each experimental group, which were fixed with a salt solution (NaCl) 5%, and the beating method, where insects collected were kept and preserved in alcohol 90°, and after them, the insects collected were pooled and brought to the laboratory, where they were prepared for determination. During the vegetation, at Barber soil traps the insects have been collected in sweet and sour cherry plantations, where various control methods have been applied. From the collected material, Coleoptera species were selected, and were determined by species. Among the most common Coleoptera have identified: Stethourus punctilum Weisse, Carabus violaceus L.; Silpha obscura L., Cymindis humeralis Fourc., Apion atomarium Kirby, Otiorrynchus ovatus L., Dermestes laniarius Illig., Harpalus calceatus Duft.
listelement.badge.access-status Open Access ,
Relationship between salt tolerance related physiological traits and protein markers in soybean cultivars (Glycine max L.)
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-03-11) Sofalian, O.; Miandoab, P.B.; Asghari, A.; Sedghi, M.; Eshghi, A.
This study was conducted to evaluate the salinity tolerance in seedling stage of soybean (Glycine max L.). Factorial experiment was done based on randomized complete block design with three replicates. 17 soybean genotypes were used in three salinity stress levels (consisting of control, 75 mM and 150 mM NaCl stress). The experiment was carried out in a greenhouse condition and proline, sodium, potassium, and chlorophyll a, chlorophyll b, chlorophyll a/b and total chlorophyll content were examined. To create salinity stress, NaCl was used in the experiment. The results revealed that different salinity stress had significant effects on all traits except for chlorophyll b and chlorophyll a/b. The cluster analysis in the control and at 75 and 150 mM salinity levels classified genotypes into two, two and three groups respectively. In each condition, the dpx and clean genotypes were placed in a group which the average traits were higher than the other genotypes. This can be generalized to the conditions of control as well as 75 and 150 mM salinity stress. Regression analysis showed possible informative loci encoding protein markers that was probable potential for selection strategies for salt weather proved by complementary tests.
listelement.badge.access-status Open Access ,
Performance of some advanced genotypes of cotton in terms of CMT, CLCuV and yield
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-05-20) Ilhai, F.; Farooq, J.; Mahmood, A.; Farooq, A.; Asif, M.
Cotton leaf curl virus (CLCuV) and heat stress are the major threats to cotton productivity in Pakistan. Both these factors inflicted huge losses in recent years. Thirty one genotypes of Gossypium hirsutum L. were sown in the experimental area of Cotton Research Institute, Faisalabad, Pakistan, on 25th of May for the purpose of screening against aforementioned stresses. Analysis of variance revealed significant variation among the tested genotypes. Some of the genotypes showed promising results in terms of CLCuV and also showed fair stability of their membranes. The strain FH- 142 showed excellent tolerance level against CLCuV and heat stress by showing the values of 0.4% for cotton leaf curl virus and membrane stability of 46.1%. The other genotypes that showed promising results in terms of CLCuV % are FH-330, MNH-886, MNH-814 and FH-312 and regarding heat stress MNH-456, FH-142, FH-118, CRSM- 38 and NIAB-112 exhibited promising results by showing the CMT % of 46.4%, 46.1, 45.5, 45.5, 44.1, and 41.9%, respectively. The findings of the experiment may be helpful in designing breeding programmes regarding CLCuV and heat tolerance as material had considerable potential for better yield as well.
listelement.badge.access-status Open Access ,
Influence of different tempering period and vacuum conditions on the rice grain breakage in a thin layer dryer
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-13) Kalantari, D.; Eshtavad, R.
Drying and milling of the paddy are known as the most important process influencing the rice grain breakage. Therefore in this study, influence of tempering period and the reduced atmospheric pressure (vacuum) on the crack formation of two rice varieties (Nemat and Pajouhesh) during the tempering stage is presented. Four different level of drying temperature (40, 50, 60 and 70°C) were used in this study. After drying, paddies have been transferred to a vacuum chamber ranging from 0.4 at to 1 atm (ambient pressure). Based on the results obtained in this study, crack formation in rice grains increases with increasing drying time and drying temperature. In contrast, a reduced pressure during the relaxation stage significantly reduced the rice grain breakage. During the relaxation period in the vacuum chamber, heat transfer within the rice grain occurs slowly, yields minimizing the thermal and moisture stresses. The optimized combination of temperature, time, and pressure for the Nemat and Pajouhesh rice varieties obtained 60°C, 5 hr, and 0.8 atm, respectively.
listelement.badge.access-status Open Access ,
Heat shock treatment can improve some seed germination indexes and enzyme activity in primed seeds with gibberellin of mountain rye (Secale montanum) under accelerated aging conditions
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-08) Ansari, O.; Sharif Zadeh, F.; Moradi, A.; Azadi, M.S.; Younesi, E.
Seed priming with gibberellin (GA) enhances seed germination performance; but the quality of primed seeds in aging condition often reduces more than non-primed seeds. An experiment was conducted to evaluate the effect(s) of heat shock treatments on germination characteristics and enzyme activity of primed mountain rye (Secale montanum) seeds with gibberellin under accelerated aging. Heat shock treatments, can substantially decrease the speed of quality reduction of mountain rye (Secale montanum) primed seeds. In primed seeds with gibberellin, which has non-aged, the highest germination percentage (GP) and normal seedling percentage (NSP) was attained from heat shock treatment at 35°C for 3 h, also after 3 days aging, it was attained from heat shock treatment at 35°C for 3 h. After 3 days of aging the highest germination index (GI) was attained from unprimed seeds, but no significant difference with heat shock treatment at 35°C for 3 h. The minimum means time germination (MTG) was in heat shock treatment at 30°C for 3 h in non-aged seeds. After 3 days of aging, heat shock treatment reduce MTG as compared to the primed seeds. Heat shock treatment at 35°C for 3 h increased seed vigor index (SVI) as compared to the unprimed and primed seed in non-aged seeds and after 3 days aging. Seedling length (SL) increases with heat shock treatment at 30°C for 4 h in non-aged seeds as compared to the primed and unprimed seeds, but after 3 days of aging heat shock treatment except at 35°C for 3 h and 40°C for 4 h reduced SL as compared to the primed and unprimed seeds. Also, heat shock treatments increase some antioxidant enzymes [Catalase (CAT), Ascorbat peroxidase (APX)].
listelement.badge.access-status Open Access ,
Evaluation of yield and yield components chickpea (Cicer arietinum L.) in intercropping with spring barley (Hordeum vulgare L.)
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-03-11) Rahimi Azar, M.; Javanmard, A.; Shekari, F.; Pourmohammad, A.; Esfandyari, E.
Intercropping is considered for increasing and stability of yield per average unit. In order to evaluate the effect of barley/chickpea intercrop, a study was carried out in the research field of Faculty of Agriculture, Maragheh University, in 2009 as randomized compelet block design, with three replicates, with row replacement series. Treatments included different combinations (1:1,2:1, 3:1, 2:2 and 3:2 row ratios of barley:chickpea) and their monocultures. Results indicated that the highest yield was obtained from combination of one row barley and one row Desi chickpea.The highest number of pods was obtained, also, in combination of one row barley and one row Desi chickpea. There was a significant difference among treatments including Desi chickpea and Kabuli chickpea 100-grain weight that its Kabuli chickpea was more. The correlation coefficient analysis indicated that number of pods per plot had the highest positive relationship and protein percentage had the highest negative relationship with yield per plot. The path coefficient analysis showed that the number of pods had the highest direct effect on yield percentage via the number of pods.
listelement.badge.access-status Open Access ,
Effect of row spacing on the yield of cotton cultivars
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-23) Jahedi, M.B.; Vazin, F.; Ramezani, M.R.
Modern cotton (Gossypium hirsutum L.) cultivars with herbicide resistance have rejuvenated an interest in narrow row cotton production, primarily because of the reduction of weed control problems encountered in the past with narrow row systems. While the primary goal of narrow row cotton is to reduce production costs, an agronomic and physiological evaluation of this cropping system is also needed. The objectives of this study were to determine the feasibility of using modern cotton cultivars in narrow rows (30 cm) for cotton production in the Gonabad and to assess the effect of these various systems on cotton growth, lint yield, and fiber quality. Plant height, sympodia and total bolls per plant were reduced in cotton grown in narrow row spacing. In most cases, cotton grown in narrow rows had lint yields equal to or higher than those attained in the 70 cm spacing. modern cultivars in narrow row cotton production did not improve lint yield. No conclusions could be made regarding the impact of plant stature on lint yield. Row spacing had little impact on fiber quality narrow row cotton appeared to be a viable agronomic cotton production practice for the Gonabad compared with conventionally - grown cotton based upon lint yield and fiber quality.
listelement.badge.access-status Open Access ,
Comparative performance of various sunflower hybrids for yield and its related attributes
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-04-08) Sarwar, M.A.; Khalil Ur Rehman, M.N.; Javeed, H.M.R.; Ahmad, W.; Shehzad, M.A.; Iqbal, S.; Abbas, H.T.
An experiment to evaluate comparative performance of various sunflower hybrids for yield and its related attributes was conducted at the Agronomic Research Area, University of Agriculture, Faisalabad, Pakistan, during autumn 2008. Twelve sunflower hybrids, i.e. G-101 (H1), DK-4040 (H2), SF-187 (H3), S-278 (H4), Hysun-33 (H5), FH-37 (H6), Ausigold-61 (H7), Ausigold-62 (H8), FSS-50 (H9), NX- 00989 (H10), NX-00997 (H11) and XIYU-12 (H12) were included in the trail. The experiment was laid out in randomized complete block design (RCBD), having three replicates with plot size of 5m x 3m. Statistical analysis of the data showed significant differences for all the parameters. It was observed that Hysun-33 showed greater plant height (148.47 cm) and achene per head (682.70) than all other hybrids, however in case of yield (3891.0 kg ha-1) and other related traits such as number of plants m-2, leaf area index, head diameter and 1000-achene weight SF-187 displayed better performance by recording values (6.87), (4.33), (18.62) and (49.11g), respectively, following Hysun-33 for most of the traits. From the results of experiment it can be concluded that the hybrids SF-187 and Hysun-33 showed high productivity and are best adapted to the climatic conditions of Faisalabad.
listelement.badge.access-status Open Access ,
Behavior of some Romanian triticale varieties in the climatic conditions of the center of Moldavia, Romania
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-27) Pochișcanu, Simona-Florina; Buburuz, Alexandra-Andreea; Pomohaci, Traian-Ioan; Gherasim Leonte, Alexandra; Naie, Margareta
Knowledge of the particularities of the new varieties response to environmental conditions is important for the best possible territorial zoning and site stating that they need to occupy in varieties structure for each area. This paper presents research results of environmental testing of six Romanian triticale varieties at the Agricultural Research-Development Station (A.R.D.S.) Secuieni, Neamţ county, Romania, during 2007-2012 and followed the zoning of the most adapted and performing genotypes, increasing their biodiversity, so as to diminish the genetic and environmental vulnerability of agroecosystems. On average for the five years of experimentation, triticale yields achieved ranged from 6984 kg/ha (Cascador) and 8439 kg/ha (Haiduc). Of the five years of experimentation, the crop years 2008-2009 and 2010-2011 were normal in terms of rainfall, the yields achieved in these years being the highest. Depending on the average yield achieved in the five years of experimenting, the top three varieties were ranked Haiduc (8439 kg/ha), Stil (8320 kg/ha) and Plai (7961 kg/ha), the first two varieties having a very low coefficient of variability (<10). During the experiment, Romanian triticale varieties showed good resistance to winter, lodging and diseases.
listelement.badge.access-status Open Access ,
Viticultural zoning: a comparative study regarding the accuracy of different approaches in vineyards climate suitability assessment
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-03-12) Irimia, Liviu-Mihai; Patriche, Cristian-Valeriu; Quénol, H.
The paper presents the results of a study regarding the mesoclimate suitability assessment of three Romania’s wine-growing centres (Urlaţi-Dealu Mare vineyard, Huşi-Huşi vineyard, Bucium-Iaşi vineyard), by the Huglin’s heliothermal index and by a GIS based multicriteria method. The results are compared between the two types of analysis and with the macroclimate suitability map of Romania’s wine regions, expressed by Huglin’s heliothermal index spatial distribution. The research show that the values of Huglin’s heliothermal index in Romania’s wine regions varies between 2341.48 on the Danube Terraces from the southern limit of the country to lower than 1500 on the intramountainous wine region Transylvania. The prevailing climate class over the Romania’s wine regions is IH-1 that define temperate climate. According to the assessment on Romania’s macroclimate scale by Huglin’s heliothermal index, the three wine-growing centers are characterized by temperate climate (IH-1), that indicate the existence of climate conditions for grapes maturation to Cabernet Sauvignon variety. The assessment on mesoclimate scale by the GIS based multicriteria method reveals a wider variability of local climate than that resulted from macroclimate and mesoclimate analysis by Huglin’s heliothermal index, as follows: the climate of Urlaţi wine-growing center is suitable for quality red wines production; in Huşi wine-growing centre only 16.95% from the area has climate suitable to produce red table wines; the climate of Bucium wine-growing centre is not suitable for red wine production. Comparison with the Romania’s vineyards wine production specialization confirms that the results of multicriteria GIS based evaluation reveal accurate the local climate suitability and demonstrate the need of the fine-scale assessment of vineyard climate in the viticultural zoning.
listelement.badge.access-status Open Access ,
The effect of long -term fertilization on the grain bean harvest in agricultural research - development station Secuieni, Neamţ county, Romania, conditions
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-21) Lupu, Cornelia; Naie, Margareta; Buburuz, Alexandra-Andreea
The application of chemical fertilizers on the grain bean crop must be done due to the plant peculiarities (high consumption of nutrients, root system underrepresented, plant ability to synthesize up to 85% of the needed nitrogen) and its high sensitivity to stress conditions. Although the bean requirements for nutrients are high, the plant response to the application of fertilizers is smaller, the obtained production increase will vary widely depending on the type of fertilizer, the applied dose, but also on the climatic conditions in the area. The paper presents the experimental results, carried aut during 2008-2010 at Agricultural Research- Development Station Secuieni, Neamţ County, Romania (A.R.D.S. Secuieni- Neamţ), on the application of phosphorus and nitrogen fertilizers in a long – term experiences. By using the two fertilizers were obtained yield increases of 3-27%. These were directly proportional to the dose of the applied fertilizer. By applying the phosphorus fertilizer, the average production increases, compared with the control variant, were ranged from 7 to 15%. Average gains, obtained by the using of nitrogen fertilizers, compared with the control variant, were ranged from 12 to 27%. Marginal production increases, obtained by applying phosphorus fertilizers were of 1,52-2,92 kg beans/ kg P2O5, and at the nitrogen fertilizers, of 1,72-3,28 kg beans/ kg N. In both cases, the marginal increases obtained were inversely proportional to the doses of the apllied fertilizer.
listelement.badge.access-status Open Access ,
Some wheat varieties behavior regarding the attack of main pathogens under climatic conditions from central area of Moldavia, Romania
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-03-21) Arsene, Iulian-Constantin; Bălău, Andreea-Mihaela; Ulea, Eugen
Due to the attack of the main pathogens agents in the wheat crop the wheat production is not exploited at the full potential. Powdery mildew, leaf spot and rust brown leaves are considered to be the most widespread and damaging diseases of wheat. In our country, the attack of these pathogens is present every year, with different intensities and it can cause production damages ranging from 3-4% to 20%. Due to this fact, the main attention of the farmers is to cultivate resistant wheat varieties to Blumeria graminis (DC.) Speer., Septoria tritici Rob. Desm. and Puccinia recondita Rob. et Desm. The main objective of this study was to evaluate the phytosanitary condition of 24 wheat varieties cultivated in 2011-2012 at the Ezăreni didactic Farm from University of Agricultural Sciences and Veterinary Medicine of Iaşi, Romania, localized in the central area of Moldavia. This study contains data regarding the spread and evolution of the main pathogens that were observed at the 24 wheat varieties studied. These varieties showed different reactions to different pathogens observed in the same environmental conditions thus some of them were resistant to Blumeria graminis (DC.) Speer. and Septoria tritici Rob. ex. Desm. attack, and some recorded a disease incidence of 18.75% at the Puccinia recondita Rob. et Desm attack.
listelement.badge.access-status Open Access ,
Nitrogen management studies in maize (Zea mays L.) hybrids
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-01-12) Iqbal, S.; Khan, H.Z.; Ehsanullah; Akbar, N.; Zamir, M.S.I.; Javeed, H.M.R.
A field experiment was conducted to study the effect of different nitrogen management methods on yield, yield components and quality attributes of maize hybrids (single cross-6142 and double cross-4444) under irrigated conditions. Nitrogen dose is met either by PM (poultry manure) or urea according to each treatment. PM was incorporated at the time of presowing irrigation whereas fertigation method at knee height stage and foliar spray at flowering were use for the application of urea. Results showed that plant height, cob diameter, number of grains per cob, grain yield and biological yield were significantly affected by the hybrids. Significantly, higher plant height, cob diameter, number of grains per cob, grain yield and biological yield were produced by single cross-6142. There was no significant difference occur between both hybrids on seed oil and protein contents. N management by the application of T3 (60% N from PM + 38.5% N from urea through fertigation + 1.5% N from urea through foliar application) produced significantly more plant height, cob diameter, number of grains per cob, grain yield, biological yield, seed protein and seed oil contents. The interaction of single cross-6142 and T3 (60% N from PM + 38.5% N from urea through fertigation + 1.5% N from urea through foliar application) was found superior in production of more plant height, cob diameter and number of grains per cob. However, interaction between maize hybrids and N application methods for grain yield, biological yield, seed protein and oil contents was reported nonsignificant. It can be concluded that single cross hybrid-6142) and T3 (60% N from PM, 38.5% N from urea through fertigation and 1.5% N from urea through foliar application) could be used successfully for improving maize yield under the irrigated conditions.
listelement.badge.access-status Open Access ,
Impact of opened, non opened pollination and nitrogen fertilizer on sesame production in the reclaimed lands, Ismailia Governorate, Egypt
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-01-15) Blal, A.E.H.; Kamel, S.M.; Mahfouz, H.M.; Said, M.
The research was conducted at the Agriculture Research Farm, Faculty of Agriculture, University of Suez Canal, during the sesame growing seasons of 2011 and 2012. For studying the impact of insect pollination and nitrogen fertilization on sesame production, the experiment was divided to 13 treatments of open pollination and non open pollination, with three different levels of ammonium nitrate (NH4NO3) and one level of seryalin as biofertilizer. Non opened pollination treatments were covered before the start of flowering period with a perforated net bag, to allow the air to pass through and to prevent insects from approaching the plants. Quantitative and qualitative indicators, were measured as follows: rate of capsule per plant, capsule weight, rate of seeds in each capsule, weight of 1000 seeds, germination (%), seedlings vigour and oil content (%). Results clearly demonstrate that qualitative and quantitative indicators of sesame crop was significantly increased with opened pollination and with the increase of nitrogen fertilizer level up to 40 kg N/ feedan-1 plus or minus seryalin, in reclaimed sandy soils, in Ismailia, Egypt.
listelement.badge.access-status Open Access ,
Hormone priming improves germination characteristics and enzyme activity of sorghum seeds (Sorghum bicolor L.) under accelerated aging
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-02-18) Azadi, M.S.; Tabatabaei, S.A.; Younesi, E.; Rostami, M.R.; Mombeni, M.
Maximum germination percentage achieves immediately after harvesting and gradually decreases with storage time. Aging is one of the key factors in plant yield loss especially in vegetables. Seed aging is the main problem of seed storage. Application of accelerated aging treatment is used to assess seed vigor and quality. Seed priming enhances seed germination performance after aging. An experiment was conduct in order to investigate the activity of catalase and ascorbate peroxidase during accelerated aging and repair during priming treatment of sorghum seeds. In order to improve germination characteristics in aged seeds with seed priming. Our result showed that seed priming treatments significantly (p≤ 0.01) affected, germination percentage, germination index and means time to germination after aging (0, 3 and 6 days). Increasing aging duration resulted higher reduction in germination characteristics. Priming with gibberelic acid (GA), salicylic acid (SA) and ascorbic acid (ASC) increased germination characteristics of seed aged. The highest germination percentage, germination index, normal seedling percentage and enzyme activity were achieved in control conditions (0 day of aging). Antioxidant activity of aged seeds increased after seed priming.
listelement.badge.access-status Open Access ,
Effects of superabsorbent and irrigation regime on seedling growth characteristics of barley (Hordeum vulgare L.)
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-01-12) Jalilian, J.; Mohsennia, O.
Greenhouse experiment was carried out to study the effects of superabsorbent and water deficit stress on seedling growth of barley (Hordeum vulgare L.) in Urmia University of Iran. Three amounts of superabsorbent polymer (0 (S1), 2 (S2) and 4 g (S3) were mixed with 500 g soil before sowing, and four levels of irrigation regimes (irrigation at 20 (I1), 40 (I2), 60 (I3) and 80% (I3) field capacity) were set as treatments. The root length, root volume, root and shoot dry weight, plant height, leaf length, leaf width, SPAD and root-shoot ratio were affected by treatments. Means comparisons indicated that the highest root length (19 cm) observed in the I4 irrigation regime and the lowest of it (16.18 cm) obtained in I1 condition. Barley plants that received 4 g and no superabsorbent had the utmost (1.13 cm) and lowest (0.54 cm) root volume, respectively. Whereas plant situated in I4 and I1 irrigation regimes produced greatest and smallest amount amount of shoot dry weight and SPAD. The maximum (12.83 cm) and minimum (8.33 cm) leaf length was obtained from S3I3 and S1I1 condition, respectively. Generally, the results showed the most of measured barley seedling traits in irrigation at 40 % field capacity (I2) were the equal with I3 and I4 irrigation regimes treatments, which indicated the resistance of barley seedling to the water deficit stress. Also, we found that the improving of root dry weight and root volume of barley seedling along with increasing in the superabsorbent application.
listelement.badge.access-status Open Access ,
Effects of nitrogen and zinc spray on yield of corn (Zea mays L.) in drought stress
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-01-09) Mosavifeyzabadi, S.H.; Vazin, F.; Hassanzadehdelouei, M.
In hot and arid regions, drought stress is considered as one of the main reasons for yield reduction. To study the effect of drought stress, nitrogen and zinc spray on the yield and yield components of corn, an experiment was carried out during the crop seasons of 2010 and 2011 on Emam Khomeyni research Farm in Mahvellat as a split factorial within randomized complete block design with three replicates. The main plots with irrigation factor and three levels were considered: full irrigation, stopping irrigation at anthesis step and stopping irrigation at the seed filling stage. Subplots were considered with and without nitrogen and zinc spray. The drought stress reduced the grain yield in anthesis stage more than other stages. Drought stress effects significantly on stem and ear diameter, ear length, chlorophyll value, leaf area index, leaf relative water content, stem, ear and leaves dry weight, number grain in ear and row, number row in ear, unfilled seed percentage and thousand grains weight. Nitrogen increased the seed yield and yield component except thousand grains weight and the number of row in ear. Using Zn, as compared with control treatment, causes the increase of grain yield, thousand grains weight and number grain in ear 16.5, 9 and 5.5%, respectively. The results obtained from the present research showed that anthesis stage was most sensitive stage to drought stress. Also nitrogen and Zn could somewhat reduce the impact drought stress on corn.
listelement.badge.access-status Open Access ,
Effect of foliar application of silicon on yield and quality of rice (Oryza sativa L.)
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-01-25) Ahmad, A.; Afzal, M.; Ahmad, A.U.H.; Tahir, M.
A field experiment was conducted at University of Agriculture, Faisalabad, Pakistan, to investigate the effect of foliar application of silicon on yield and quality of fine rice (Oryza sativa L.). The research was designed as randomized complete block design (RCBD) having three replications and 6m x 4.5m net plot size was maintained. Foliar applications of silicon’s aqueous solution were used as treatments comprised of control, 0.25%, 0.50%, 1.00% silicon solutions. Nursery of 30 days old seedling nursery was transplanted to the plots under aerobic condition and 22.5cm hill to hill distance was maintained. Sodium silicate (20.35% Si) as the source of silicon (soluble in warm water) was used. Fertilizer inputs as nitrogen, phosphorus and potassium were uniformly applied at the rate of 100, 67, 67 kg ha-1 while all other agronomic practices were kept constant for all the treatments. The data from the field (yield components) as well as lab analysis (quality parameters) was recorded according to the standard procedures. Fisher’s analysis of the variance technique was used for statistical analysis and treatment’s mean differences were compared using least significant difference (LSD) test at 5% probability level. Silicon showed no significant effect on plant height, harvest index, number of kernels and opaque kernels percentage. Silicon (0.50% silicon solution) produced maximum grain diameter and grain protein while silicon @ 1.00% silicon solution resulted maximum in number of productive tillers, straw yield, spike per panicle, 1000 grain weight, paddy yield and grain starch. All others parameters have overlapping results of different silicon levels.
listelement.badge.access-status Open Access ,
Effects of fenugreek and dill different intercropping patterns and harvesting times on essential oil of dill
(“Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Iași, 2013-01-21) Shokati, B.; Ghassemi Golezan, K.
Intercropping is an important and sustainable cropping practice in agroecosystems. Intercropping is a planting technique that farmers and gardeners can use to promote beneficial plant interactions and increases in biodiversity, enhanced production and lower economic risk. In the search for sustainable agricultural methods for medicinal plants, fenugreek and dill plants were intercropped at different additive (1:20, 1:40 and 1:60) and replacement (1:1, 1:2 and 1:3) series, at the Research Farm of the Faculty of Agriculture, University of Tabriz, Iran. Field experiment was arranged as split plot based on randomized complete block design in three replicates. Dill umbels were harvested at flowering, pasty and complete ripening stages. Results showed that among harvesting times, pasty stage had maximum essential oil percentage, essential oil yield and harvest index of essential oil, whereas among intercropping patterns, 1:1 and 1:20 treatments had the maximum values. Fenugreek as a medicinal, forage and legume crop promote dill essential oil yield and harvest index and could be an effective plant in intercropping systems.

Browse

Recent Submissions