60 Chinese Holstein dairy cows whose age,calving number,body condition,milk production were approximately accordant were randomly divided into two groups(n=30).
选用60头中国荷斯坦奶牛,按照胎次、体况及产乳量随机分成A、B两组(n=30)。
Eight lactating Holstein dairy cows were divided into two groups (n=4) and used in a double reversal trial with three periods of 14 days each, to evaluate the effects of rumen protected fatty acids and amino acids(Lys and Met) blend(RPLMF) on rumen fermentation, blood metabolism, milk production and composition.
4 kg/d;产乳量和4%的标准乳量分别为24。
The occurration of milk fever and application of anion salt in dairy cow;
奶牛产乳热的发生及阴离子盐的应用
Supplementation of anionic salts prepartum can prevent milk fever.
饲粮中添加阴离子盐可以影响奶牛体内的酸碱平衡,预防产乳热的发生。
The effects of total mixed ration on milk performance in dairy cattle;
全混合日粮对奶牛产乳性能的影响
Effects of high zinc dietary on milk production and serum zinc content of dairy cattle;
高锌日粮对奶牛产乳性能及血锌含量的影响
A comparative study on milk yields and milk biochemical composition properties of Tibetan Sheep and Chengdu Ma Goat;
草地藏系绵羊和成都麻羊产乳量及乳的生化组成特性比较研究
Ten Holstein lactating cows were divided into two groups(n=5),one as control in a double reversal trial design to evaluate effects of increasing the rumen-undegraded protein(RUP) in ration on ruminal fermentation,blood metabolites,milk yield and composition.
选用10头经产荷斯坦种乳牛分为对照和试验两组,以二乘反转法,研究了增加日粮中非降解蛋白质(RUP)的含量对高产奶牛瘤胃发醇、产乳量和乳成分的影响。
Ten lactating Holstein cows were divided into two groups (n=5) of cont rol and experiment, and used in a double reversal trial, to evaluate the heated soybean meal on blood metabolism, milk yield and composition in high-producing l actating dairy cows.
选用10头经产荷斯坦乳牛分为对照和试验组(n=5),以二乘反转法,研究了加热大豆粕对奶牛血液代谢产物、产乳量和乳成分的影响。