北方寒区奶牛高产高效益配套技术的研究

为了研究北方；寒区奶牛高产高效益配套技术；我们受农业部和农场总局委托，“八五”期间在８５１１农场，香坊农场，８５２农场，８５０和克山农场奶牛群，根据北方寒区特点，在奶牛选种，后备牛的培育，饲养管理，饲料选择和调制，配种和疾病防治等方面采取了全方位措施。

STUDIES ON THE HIGH YIELD AND BENEFIT AND A COMPLETE SET OF TECHNOLOGY OF DAIRY CATTLE IN THE NORTH FRIGID ZONES

To research the high yield and benefit and a complete set of technology of dairy cattle in the north frigid zones ,we were entrusted by the Agriculture Ministry and the General Bureau of State Farm of Heilongjiang province to have taken all measures on selection of dairy cattle ,rear of replacement cattle, feeding management , service and disease control according to the features of the north frigid zones in dairy cattle herds of Farm 8511,Farm Xiangfang,Farm 852, Farm 850 and Farm Keshan during the eighth fiveyear plan. The results showed that we had selected 1816 herd dairy cows beyond 7000 kg in 305day milk yield during five years and with the average milk yield of 7674.22 kg ,the average milk fat percentage of 3.64%,and milk feed ratio of 3.05:1.The average milk yield of the high milk cattle was more than that of the population,the surplus milk yield was 3436.91tons,the milk yield had increased 1892.57 kg per dairy cattle ,thus the surplus milk powder yield was 470.53 tons ,and the milk powder yield had increased 259.10 kg per dairy cattle .The milk production of the highmilk cattle had increased 2760700 yuan , (1520.24 yuan per dairy cattle) . Not only the highmilk cattle increased the milk yield ,but also the economy was considerable.