CAJ | 학술논문

为研究光照对奶牛泌乳和采食性能的影响,分别选择处于第Ⅰ泌乳月和第Ⅳ泌乳月的90头和45头奶牛,采用人工光照的方式,使奶牛每天的光照时间分别由自然光照的9.5 h增加到15 h和18 h.试验期30 d,分析测定了产奶量、乳脂率、采食量及经济效益.结果发现当光照时间为15 h时,试验牛的产奶量和采食量均显著高于9.5 h和18 h试验牛(P＜0.05);且经济效益较好,每头奶牛每天可增收3.95元;各试验组奶牛牛奶乳脂率无显著差异(P＞0.05).综合分析表明在奶牛饲养管理中每天提供15 h光照较好.
위연구광조대내우비유화채식성능적영향,분별선택처우제Ⅰ비유월화제Ⅳ비유월적90두화45두내우,채용인공광조적방식,사내우매천적광조시간분별유자연광조적9.5 h증가도15 h화18 h.시험기30 d,분석측정료산내량、유지솔、채식량급경제효익.결과발현당광조시간위15 h시,시험우적산내량화채식량균현저고우9.5 h화18 h시험우(P＜0.05);차경제효익교호,매두내우매천가증수3.95원;각시험조내우우내유지솔무현저차이(P＞0.05).종합분석표명재내우사양관리중매천제공15 h광조교호.
90 cows in first lactating month and 45 cows in IV lactating month were selected respectively to research illumination time effects on lactating and foraging performance.The illumination cows received increased form 9.5 h of natural lighting to 15 h and 18 h through artificial lighting every day.During thirty days,milk yield, milk fat rate, feed intake and economic benefit were analyzed and measured.The results showed the group with 15 h illumination was higher in milk yield and feed intake than that of 9.5 h and 18 h (P<0.05).And the 15 h group had the best economic benefits that increase income of 3.95 Yuan per cow every day.There were no significant difference between groups in milk fat rate (P>0.05).As a result,15 h illumination time is best way for cow feeding and management.