Effect of protein levels in concentrate feed on milk production of cows(1) Fed good quality roughage
2000
Somchit Intharamanee | Muangnon Soawakhataphum | Chinda Snitwong(Department of Livestock Development, Bangkok (Thailand). Div. of Animal Nutrition)
Study was conducted to compare the effect of different levels of protein content in concentrate supplement for lactating cows in rainy season. Fifteen crossbred cows were arranged in a randomized complete blcok design with 5 replications and 3 treatments. The animals were fed ad libitum with fresh ruzi grasses as the basal diet and supplemented with concentrate feed containing different protein levels of 16, 18 and 20 percent at the same rate of 1 kg per 2 kg of milk yield, two time feeding daily. Milk production were recorded and milk samples were collected every 30 days. The experimental period lasted of 90 days. The result showed that there was no significant difference in average of total dry matter feed intake of animals (11.16 11.64 and 11.83 kg/head/day, respectively, milk yield (4 percent FCM) (11.71 11.09 and 10.41 kg/head/day, respectively), feed conversion ratio (0.95 1.04 and 1.14 kg, respectively), milk composition and the total feed cost/kg of milk yield. However the difference were not statistically significant among treatments mean in the study. It is observed 16 percent crude protein content in diet supplement trend to give lower feed cost/kg of milk yield than the other feed protein levels supplement.
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