关于奶牛阶段饲养的研究

本研究选择黑白花奶牛进行了阶段饲养与常规饲养的对比试验,对两组牛日粮组成及营养水平、日粮消化率、产奶量、乳成份等进行测定,并进行了经济效益分析。结果表明,试验组泌乳前期、中期和全泌乳期产奶量均显著高于对照组(P<0.05);对于乳脂率,试验组显著高于对照组(P<0.05)。日粮各种营养物质消化率试验组均高于对照组,但差异不显著(P>0.05)。在整个泌乳期期间,试验组比对照组多产奶865.3kg,增加收入640.32元,经济、社会效益显著。可见,阶段饲养新技术充分发挥了高产奶牛的产奶性能。本研究为我区乃至我国奶牛生产提供了科学数据和理论依据。

A Study on Dalry Phase Feeding

Eight Holstein-Friesian cows were randomly assigned to freatment group and control group,eacth with four The freatment group were fed according to phase-feeding,the control group were fed according to cenventional feeding. Diet nutritional level,diet nutrient degestibility,milk yield,milk ingredients were detemined.The economic benifit was also analyzed. The result showed that milk yield of the treated cows were significantly (p<0.05)higher than that of control group in early,middle and whole lactation period However the difference of milk ingredients contents between groups was not significant(p>0.05).The degestibilities of diet nutrients in freatment group were higher than that in control group,but no significant differences(p>0.05).In the whole lactation period,the cows in treatment group yield 863.5 kg milk more than that in control group.Correspondingly the benefit is 640.22 yuan more than that of control group The economic and social benefits were obvious.It is concluded that the phase-feeding bring the milking performance of high yield cows into for play.This study offers the scientific data and theoretical basis for the dairy production of our autonomous region and our country.