MARIUS GHEORGHE DOLIS, PAUL CORNELIU BOISTEANU, MARIUS GIORGI USTUROI, DANIEL SIMEANU, DAN BODESCU, GHERASIM NACU, ALEXANDRU USTUROI, CRISTINA SIMEANU RESEARCH ON DIGESTIBILITY OF THE MULBERRY LEAF FROM THE KOKUSO 21 VARIETY IN RELATION TO THE DYNAMICS OF THE CHEMICAL CONTENT During the growth of silkworm larvae study, also was done a research which aimed to determine the chemical composition and the digestibility of mulberry leaves from a Japanese variety, Kokuso 21. 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. Accordingly, with this, to the majority of nutrients from mulberry leaves, except the crude fiber was noticed a continuous digestibility decreasing throughout larval growth period So, for example, digestibility of crude protein decreased gradually throughout the studied period, with 27.11%, respectively from 84.42% at the first chemical determination to 61.53% at the last one. The nutrients digestibility from the leaves registered in average a value of 55.87%.
Keywords: chemical composition, leaves, mulberry, silkworm larvae, digestibility