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首页> 外文期刊>Asian-Australasian Journal of Animal Sciences >Development and Evaluation of a Simulation Model for Dairy Cattle Production Systems Integrated with Forage Crop Production
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Development and Evaluation of a Simulation Model for Dairy Cattle Production Systems Integrated with Forage Crop Production

机译：与饲草作物生产相结合的奶牛生产系统仿真模型的开发和评估

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Crop-livestock mixed farming systems depend on the efficiency with which nutrients are conserved and recycled. Home-grown forage is used as animal feed and animal excretions are applied to cultivated crop lands as manure. The objective of this study was to develop a mixed farming system model for dairy cattle in Japan The model consisted of four sub-models: the nutrient requirement model, based on the Japanese Feeding Standards to determine requirements for energy, crude protein, dry matter intake, calcium, phosphorus and vitamin A; the optimum diet formulation model for determining the optimum diets that satisfy nutrient requirements at lowest cost, using linear programming: the herd dynamic model to calculate the numbers of cows in each reproductive cycle; and the whole farm optimization model to evaluate whole farm management from economic and environmental viewpoints and to optimize strategies for the target farm or system. To examine the model's validity, its predictions were compared against best practices for dairy farm management. Sensitivity analyses indicated that higher yielding cows lead to better economic results but higher emvironmental load in dairy cattle systems integrated with forage crop production.
机译：作物－畜牧混合种植系统取决于养分和循环利用养分的效率。将自家种植的草料用作动物饲料，将动物排泄物作为粪肥施用到耕地。这项研究的目的是开发日本奶牛的混合饲养系统模型。该模型由四个子模型组成：营养需求模型，基于日本饲喂标准来确定能量，粗蛋白，干物质摄入量的需求，钙，磷和维生素A;用于确定成本最低，满足最低营养要求的最佳日粮的最佳日粮配方模型，使用线性规划：牛群动态模型，计算每个繁殖周期中的母牛数量;整个农场优化模型可以从经济和环境角度评估整个农场管理，并针对目标农场或系统优化策略。为了检验模型的有效性，将其预测与奶牛场管理的最佳实践进行了比较。敏感性分析表明，高产母牛可以带来更好的经济效益，但奶牛系统与饲草作物生产相结合的环境负荷更高。

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