本文旨在评价使用CPM模型改善日粮能氮平衡和提高奶牛生产性能的效果。
The objective of this study was to evaluate CPM model in terms of improvement in performance of lactating cows by balancing dietary energy and protein.
本文介绍了影响干草制备的因素及化学干燥剂对干草制备和奶牛生产性能的影响。
The factors affecting the hay production and the influences of chemical desiccant on the production of hay and the performance of dairy cattle were introduced.
摘要本试验旨在研究热应激条件下不同代谢葡萄糖水平的饲粮对奶牛生产性能和生理指标的影响。
Abstract: This experiment was conducted to study the effects of dietary metabolizable glucose (MG) level on performance and physiological indices of dairy cows under heat stress.
摘要：本试验旨在研究热应激条件下不同代谢葡萄糖水平的饲粮对奶牛生产性能和生理指标的影响。
Abstract: This experiment was conducted to study the effects of dietary metabolizable glucose (MG) level on performance and physiological indices of dairy cows under heat stress.
DCAD直接影响奶牛血液的酸碱平衡及酶系统等的功能，可以改善奶牛的健康状况、提高奶牛生产性能。
DCAD has straight effects on blood acid-base balance and enzyme system's function of dairy cows, and it can improve on the dairy cows' health status and increase the milk performance.
本文对小肽的营养，反刍动物对小肽的吸收途径、吸收机制及其对小肽的利用，小肽对奶牛生产性能的影响进行综述。
The nutrition, the absorption approach and mechanism, utilization of small-peptide in ruminants and effects of small-peptide on production performance in cows were reviewed.
研究结果显示，在常规饲养条件及管理模式基础上，采用不同营养措施及物理降温措施，均又助于夏季奶牛生产性能的改善。
The results suggested that based on traditional ways, adopting different nutritive measures and physical measures could improve cow milk performance in summer.
本论文第二部分主要研究了四种不同精粗比典型日粮条件下泌乳奶牛瘤胃氮素代谢、小肠蛋白质的消化吸收及其对生产性能的影响。
The second part was mainly conducted to study the effects of four typical diets on rumen nitrogen metabolism, protein digestion and absorption in the small intestine, and dairy cow's milk performance.
用该产品替代豆饼饲喂蛋种鸡、奶牛、罗非鱼，对其生产性能无影响，且降低了饲料的成本。
Then the cottonseed cake can be replaced the soybean cake to feed breding hens, cows and herring fish, the results shown that it has not any influences to the performance and has less feed cost.
奶牛在妊娠晚期、产奶早期、高温时期和运输过程中处于极度应激的状态下，生产性能、免疫力、繁殖性能均受到影响。
During periods of stress, such as prepartum, postpartum, high temperature and transportation, milk production, immune function, reproductive performance of dairy cows are reduced.
以上试验结果表明，双翅目昆虫诱发的聚集行为对奶牛的外周血酶活性、心率、体温和生产性能均产生了不良影响。
These results show that aggregation induced by Diptera activity produce negative effect on the cow's Enzyme activity, heart rate, body temperature and performance.
2005年在宁夏某奶牛场曾发生多次腐蹄病病例，严重影响奶牛的生产性能，用一般治疗方法其治愈率甚微。
There are many cases of the dairy cow ulcer hoof disease in some farms of Ningxia in 2003~2005, which severely influenced the dairy cow production ability.
2005年在宁夏某奶牛场曾发生多次腐蹄病病例，严重影响奶牛的生产性能，用一般治疗方法其治愈率甚微。
There are many cases of the dairy cow ulcer hoof disease in some farms of Ningxia in 2003~2005, which severely influenced the dairy cow production ability.
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