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Case Study-Effect of Implementation of a Systematic Reproduction Management Program in Dairy Herds

机译：案例研究-奶牛群实施系统性生殖管理计划的效果

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The objective of this field study was to measure the effect of implementing a simple systematic reproduction management program in dairy herds with reproductive performance near or below typical in the industry. Thirty-nine herds across Canada that had annual herd 21-day pregnancy rates (PR) between 8 and 15%, and did not have a systematic reproduction program, were enrolled in a program that consisted of. enrollment of cows that were not inseminated by 70 days-in-milk into a timed insemination program (Ovsynch); enrollment of cows diagnosed not pregnant on Ovsynch; and a change to biweekly veterinary visits for reproductive management. Annual herd PR was compared one year after implementation of the program. On average, the systematic management program was associated with a mean increase in PR of 3.6 percentage points (95% confidence interval, 2.5 to 4.7; P<0.0001), accounting for initial insemination and conception rates, herd size and method of pregnancy diagnosis. Assuming a milk price of $23/cwt to reflect Canadian milk price net of purchase of quota, economic analyses indicated that herds that increased PR by at least two points were estimated to have an annual net profit improvement between $20 and $250 CDN per cow, depending on the initial PR and the magnitude of the increase in PR. Overall, 72 to 77% of herds that implemented the program were estimated to have a net economic benefit.
机译：这项实地研究的目的是衡量在生殖性能接近或低于该行业典型水平的奶牛群中实施简单的系统生殖管理程序的效果。全加拿大有39个牛群，他们的21日年妊娠率（PR）在8％至15％之间，并且没有系统的繁殖程序，被纳入了一个由以下程序组成的程序。将未通过70天母乳授精的母牛纳入定时授精程序（Ovsynch）;在Ovsynch上诊断为未怀孕的母牛的入选;以及每两周进行一次生殖管理兽医访问。该计划实施一年后，对年度畜群P​​R进行了比较。平均而言，系统的管理程序使PR的平均增加3.6个百分点（95％置信区间为2.5至4.7; P <0.0001），这说明了初始授精和受孕率，畜群规模和妊娠诊断方法。假设牛奶价格为23美元/英担，可以反映加拿大牛奶价格扣除配额后的购买量，则经济分析表明，公猪价格至少提高两点的牛群每年每头母牛的净利润提高了20加元至250加元。最初的PR和PR的增加幅度。总体而言，估计实施该计划的牛群中有72％至77％具有净经济利益。

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