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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1998;11(4): 455-461.
DOI: https://doi.org/10.5713/ajas.1998.455    Published online August 1, 1998.
Effects of supplementary Chinese milk vetch silage and rapeseed meal on the performance and rumen fermentation of lambs given ammoniated rice straw based diet
Yueming Wu, J. X. Liu, Z. Chen
This study was proposed to investigate effects of inclusion of Chinese milk vetch silage (MVS) and rapeseed meal (RSM) on the growth and rumen fermentation of Hu-sheep. Fifty weanling lambs were randomly divided into five equal groups and offered ammoniated rice straw (ABRS) ad libitum along with 100g concentrate (Trial 1). The animals in T0, T1, T2, T3 and T4 group were respectively supplemented with MVS at levels of 0, 0, 7, 14 or 21% and with RSM at levels of 0, 15, 10, 5 or 0%. Daily gain of lambs was significantly (p < 0.05) higher in T1, T2 and T3 group than that in T0 and T4 group. Feed conversion ratio was greatly reduced in supplemented groups as compared with T0 group. In Trial 2, five sheep with rumen cannulae were used in a 5횞5 Latin square design. The experimental treatments were as described in Trial 1, but without concentrate. The intake of ABRS was significantly (p < 0.05) lower in T4 group than that in T0 group, and also significantly (p < 0.05) lower than those in T1 and T2 group. Little difference among all treatments was found in 48h DM degradability of ABRS, MVS and RSM, and in rumen pH value and microbial protein concentration. Rumen concentrations of individual and total VFA tended to be higher in supplemented groups than those in T0 group. These results suggest that supplementation with RSM or RSM plus MVS can effectively improve the performance of lambs, and may fail to influence markedly the rumen digestion of ABRS and rumen environments.
Keywords: Chinese Milk Vetch Silage; Rapeseed Meal; Ammoniated Rice Straw; Growth Rate; Rumen Degradation; Rumen Parameter

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