Study regarding the use of mulberry leaves from eforie variety by bombyx mori –zefirhybrid

Abstract

During the growth of silkworm larvae(the Bombyx mori Zefir larvae hybrid)study, also was done a research which aimed to determine the chemical composition and the digestibility of mulberry leaves from a Romanian variety, Eforie. The results showed that advancing in the vegetation stage at the same time with different periods of the silkworm larvae’s growth, the mulberry leaves experience an aging process being noticed through its quality decreasing from chemical composition point of view. So, for example, the CP which was in average 20.98± 0.670% (from DM), decreased during the study with 3.11%; while the CF had an average of 17.91± 0.434%, (from DM) increased with 2.29%. Thedigestibility of these nutritional components registered a value of 57.21%, the raw energy value was 4213 kcal/kg dry substance, the digestive energy was 2324 kcal/kg (DS), while the metabolic energy was 2154-2157 kcal/kg (DS). The efficiency of converting ingestion into silk had a value of 9.50% and the digestion was 16.61%.