摘要
选择8头泌乳前期的中国荷斯坦奶牛,采用4×4重复拉丁方设计,研究奶牛日粮加锌对营养物质全消化道表观消化率的影响。试验分为4组,每组2头,其中A为对照组(基础日粮);B组(基础日粮+20mg/kgZn);C组(基础日粮+40mg/kgZn);D组(基础日粮+60mg/kgZn),试验期分3个阶段,共3个月。结果表明:B组、C组和D组干物质、粗蛋白质、粗脂肪、酸性洗涤纤维和中性洗涤纤维的全消化道表观消化率均比A组有增强的趋势,但均差异不显著(p>0.05)。
Eight primiparous Holstein cows were selected in a replicated 4×4 Latin squar design to determine the effects of supplemental Zinc on nutrient digestibility.Treatments involved the control group A(basal diet);B(basal diet plus Zn 20mg/kg DM);C(bastal diet plus Zn 40mg/kg DM);D(basal diet plus Zn 60mg/kg DM).The results were listed as below:The apparent digestibility of dry matter,crude protein,EE,ADF and NDF tend to be higher for supplemental Zinc treatments,but no significant difference(p>0 05).
出处
《中国奶牛》
北大核心
2002年第2期14-16,共3页
China Dairy Cattle
关键词
奶牛
锌
养分消化率
日粮
lactating cows
Zinc
nutrient digestibility
