动物营养学报2016，Vol.28Issue(5)：1394-1401,8.DOI:10.3969/j.issn.1006-267x.2016.05.015
氯化铵对泌乳奶牛生产性能及血尿代谢的影响
Effects of Ammonium Chloride on Performance, Serum and Urine Metabolism of Lactating Cows
摘要
Abstract
The present study evaluated the effects of ammonium chloride on performance, serum and urine me⁃tabolism of lactating cows to determine the optimal supplemental level for lactating dairy cows. Forty⁃eight Hol⁃stein dairy cows, similarly in days in milk, body weight, milk yield and parity, were randomly assigned to 1 of 4 groups with 12 cows according to a completely randomized design. The supplemental level of ammonium chloride was 0 ( control) , 150, 300 and 450 g/d, respectively. The pre⁃trial lasted for 14 days and the trial lasted 56 days. The results showed as follows:1) dry matter intake ( P=0.012) and milk yield ( P=0.008) decreased linearly as the supplemental level of ammonium chloride increased, and 300 and 450 g/d groups were significantly lower than control group (P<0.05); no significant effects were observed on milk fat per⁃centage and lactose percentage ( P>0.05) , while milk protein percentage tended to be linearly increased ( P=0.094). 2) Urine pH decreased quadratically as ammonium chloride supplemental level increased ( P =0.012), and 300 and 450 g/d groups were significantly lower than control group (P<0.05); the concentra⁃tions of serum Cl-(P=0.002) and urine Cl-(P=0.004), Ca2+(P<0.001), P5+(P=0.017) and Mg2+(P=0.048) increased linearly as the supplemental level of ammonium chloride increased. 3) Serum urea concentra⁃tion increased linearly as ammonium chloride supplemental level increased ( P=0.018) , and 300 and 450 g/d groups were significantly higher than control group ( P<0.05) . In conclusion, ammonium chloride supplemen⁃tal level of lactating dairy cows should not exceed 300 g/d, and a more appropriate supplemental level is 150 g/d.关键词
奶牛/氯化铵/生产性能/血尿代谢Key words
lactating cow/ammonium chloride/performance/serum and urine metabolism分类
农业科技引用本文复制引用
王坤,赵圃毅,刘威,卜登攀,刘士杰,张开展..氯化铵对泌乳奶牛生产性能及血尿代谢的影响[J].动物营养学报,2016,28(5):1394-1401,8.基金项目
“十二五”科技支撑（2012BAD12B02-5）；农产品质量安全监管（饲料）项目“反刍动物饲料安全评价”；中国农业科学院科技创新工程 （）
