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Improving Nutrient Use Efficiency

机译:提高养分利用效率

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摘要

Public interest and awareness of the need for improving nutrient use efficiency is great, but nutrient use efficiency is easily misunderstood. Four indices of nutrient use efficiency are reviewed and an example of different applications of the terminology show that the same data set might be used to calculate a fertilizer N efficiency of 21% or 100%. Fertilizer N recovery efficiencies from researcher managed experiments for major grain crops range from 46% to 65%, compared to on-farm N recovery efficiencies of 20% to 40%. Fertilizer use efficiency can be optimized by fertilizer best management practices that apply nutrients at the right rate, time, and place. The highest nutrient use efficiency always occurs at the lower parts of the yield response curve, where fertilizer inputs are lowest, but effectiveness of fertilizers in increasing crop yields and optimizing farmer profitability should not be sacrificed for the sake of efficiency alone. There must be a balance between optimal nutrient use efficiency and optimal crop productivity.
机译:公众的兴趣和对提高养分利用率的需求的认识很高,但养分利用率却容易被误解。对养分利用效率的四个指标进行了回顾,并举例说明了该术语的不同应用,表明可以使用相同的数据集来计算肥料氮利用率为21%或100%。研究人员管理的主要谷物作物实验中的肥料氮回收率介于46%至65%之间,而农场的氮肥回收率则为20%至40%。可以通过肥料最佳管理实践来优化肥料利用效率,该管理实践应以正确的速度,时间和地点施用养分。最高的养分利用效率总是发生在产量响应曲线的下部,肥料投入最低,但是单靠提高效率不应该牺牲肥料在提高作物产量和优化农民获利能力方面的有效性。最佳养分利用效率和最佳农作物生产力之间必须保持平衡。

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