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首页> 外文期刊>The Proceedings of the New Zealand Society of Animal Production >A farm level model to aid decisions regarding the feeding of concentrates to dairy cattle
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A farm level model to aid decisions regarding the feeding of concentrates to dairy cattle

机译：一种农场级别的模型，可帮助您做出有关向奶牛饲喂精矿的决策

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摘要

In recent years dairy farm consultants in New Zealand and Australia have regularly been asked to provide advice to farmers on whether the feeding of concentrates to lactating cows on pasture diets is likely to be economic. The outcome of such a decision is complicated because its effects on milk production, liveweight change, pasture growth and decay, and herd reproductive performance are influenced by variables pertaining to the particular farm and herd involved. Some responses to concentrate inputsare immediate; others occur in the long term, Information on each response variable was integrated into a manual decision support framework to provide a practical decision aid for consultants and farmers. A spreadsheet template was then developed to reduce calculation time and allow a wider range of feed and herd situations to be evaluated. The total economic benefits, and hence breakeven price for concentrates were found to be heavily dependent on the long term moblisation of liveweight gained, utilisation of extra pasture grown and changes in the herd's calving pattern.
机译：近年来，经常要求新西兰和澳大利亚的奶牛场顾问就牧场饮食中的浓缩奶喂养奶牛是否很经济向农民提供建议。这项决定的结果是复杂的，因为它对牛奶生产，活体重变化，牧场生长和腐烂以及畜群繁殖性能的影响受与所涉及的特定农场和畜群有关的变量影响。对集中投入的一些反应是立即的;从长远来看，还有其他情况发生，有关每个响应变量的信息已集成到手动决策支持框架中，以为顾问和农民提供实用的决策帮助。然后开发了一个电子表格模板，以减少计算时间，并可以评估更广泛的饲料和畜群状况。发现总的经济收益以及精矿的盈亏平衡价格在很大程度上取决于长期动员的增重体重，利用多余草场的利用以及畜群产犊方式的变化。

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