| 摘要: |
| 建国以来,我国奶牛业积累了很多饲养经验,进行了奶牛营养方面的科学研究,但至今仍无我国奶牛饲养标准,与现代化的需要很不适应。现将我们多年来的科学试验结果报告如下,供制定我国奶牛饲养标准的参考。 |
| 关键词: 净能 标准乳 产奶量 干物质进食量 营养需要 饲养标准 黑白花奶牛 能量需要 奶牛业 维持需要 |
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| STUDIES ON THE NUTRIENT REQUIREMENTS OF BLACK AND WHITE DAIRY CATTLE |
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| Abstract: |
| The studies on nutrient requirements of dairy cattle were started in 1962,some results were achieved. As the calculation of energy figure is very complicated in feeding practice,we suggest that a new energy system which combine the sci- entific conception of energy metabolism with dairy farm feeding prac- tice be adopted.The energy content of feeds and requirements of dai- ry cattle is better expressed in DAIRY CATTLE ENERGY UNIT(NND), one NND being equivalent to the net energy content of one kg FCM: NND=(h... |
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