The vitamin E requirements of growing Japanese quail, Coturnix coturnix Japonica
1985
Shim, K.F. | Phang, V. | Teoh, K.W. (National University of Singapore (Singapore). Dept. of Zoology)
The objective of the project was to study the effect of the varying levels of vitamin E on the Japanese quail, and to determine the optimum level of vitamin E for growth, feed conversion efficiency and gonad development. Day-old quails were randomly assigned to 4 different treatments. Four diets with supplementary vitamin E levels of 0 mg, 25 mg, 50 mg and 75 mg were fed to the quails. The body weight and feed conversion values were determined weekly. Each week, quails from each treatment were also dissected and their gonads removed, weighed and subjected to histological studies. The results showed that vitamin E had no significant effect on the growth rate and feed conversion efficiency of quails. The growth of the testis was significantly lower in quails fed with no supplementary vitamin E. The vitamin level of 50 mg per kg diet was found to be optimum for the growth of the testis and ovary. Quails fed with 50 mg vitamin E showed h0834eavier weight of the testis, and the seminiferous tubules were also larger and spermatogenic activity more rapid, than in the other treatments. The ovaries of these quails also appeared to be heavier although not statistically signifi
显示更多 [+] 显示较少 [-]