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作 者:马玉霞[1,2] 廉红霞[1] 高腾云[1] 叶果[3] 席进华[3]
机构地区:[1]河南农业大学牧医学院,郑州450002 [2]中原工学院图书馆,郑州450007 [3]安阳钢铁公司奶牛场,淇县456750
出 处:《中国粮油学报》2010年第7期85-89,共5页Journal of the Chinese Cereals and Oils Association
基 金:荷兰王国国际合作项目、国家农业科技跨越计划(2003-22)
摘 要:选择2~4胎次泌乳中期的荷斯坦牛48头,配对分为4组,每组12头:CK(基础日粮)、Ⅰ组(基础日粮+400 g脂肪酸钙)、Ⅱ组(基础日粮+2.5 kg苜蓿干草)和Ⅲ组(基础日粮+400 g脂肪酸钙+2.5 kg苜蓿干草),于7~9月进行50 d的饲养试验,以研究添加脂肪酸钙或(和)苜蓿干草对热应激奶牛生产性能和血液指标的影响。结果表明:(1)添加脂肪酸钙或(和)苜蓿干草可以减缓热应激条件下奶牛产奶量的下降,提高产奶量,其中,Ⅲ组产奶量极显著高于CK(P<0.01);(2)添加脂肪酸钙或(和)苜蓿干草有提高乳脂率的趋势(P>0.05);(3)有提高血清T_4和COR水平的趋势(P>0.05),且Ⅲ组血清T_3含量显著高于CK(P<0.05)。48 healthy Holstein cows in parturition numbers of 2~4 and mid-lactation stage were randomly divided into 4 groups of 12 cows each,to carry out a 60 d feeding trial to study effects of calcium soaps of fatty acids and alfalfa hay on performance and blood indexes of heat - stressed dairy cows.The 4 groups were appointed as control group(basal diet),group 1(400 g·d^(-1) calcium soaps of fatty acids),group 2(2.5 kg·d^(-1) alfalfa hay) and group 3(400 g·d^(-1) calcium soaps of fatty acids and 2.5kg·d^(-1) alfalfa hay).Results:(1) Adding calcium soaps of fatty acids or(and) alfalfa hay lessens the heat stress induced decline tendency of milk yield;the milk yield of group 3 is extra significantly higher than that of control group(P0.01).(2) The milk fat content trends to increase with addition of calcium soaps of fatty.acids or(and ) alfalfa hay(P0.05 ).(3) The level of thyroxine (T_4) and Cortisol(COR) in serum trends to increase(P0.05),and the level of triidothronine(T_3) of group 3 increases significandy(P0.05) compared with control group.
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