Development of methods for remotely sensing grass growth to enable precision application of nitrogen fertilizer
Development of methods for remotely sensing grass growth to enable precision application of nitrogen fertilizer
复制标题
开发遥感草生长的方法以实现氮肥的精确施用
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
C. Blacker
中科院分区：
文献类型：
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作者：
P. Berry;H. Holmes;C. Blacker
一个“棋盘”的田间试验，以调查如何在一个领域内的氮（N）肥料的产量反应空间变化在英国表明，最佳的N量变化很大，高达100公斤N/公顷内的3公顷的实验区。氮最适值的变化与土壤供氮量呈负相关。但土壤供氮量、产量潜力和肥料表观利用率三者之间存在相关性，说明各因素对氮素最适值的影响是复杂的。光谱反射率指数与作物氮素吸收相关性较好，可用于估算土壤氮素供应。
A ‘chessboard’ field experiment set up to investigate how the yield response to nitrogen (N) fertiliser varied spatially within a field in the UK indicated that the optimum N rate varied substantially by up to 100 kg N/ha within the three hectare experimental area. Variation in N optima was negatively related to the soil N supply. However, soil N supply, yield potential and apparent fertiliser recovery rate were inter-related which meant that the influence of each element on N optima was complex. Spectral reflectance indices related well to crop N uptake and could be used to help estimate soil N supply.