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本文描述了估算冬小麦生长及其氮素含量的简明电算模型。对照全英国不同的试验设计所得结果,应用新的统计理论,验证了本模型的可靠性。研究发现,在试验许可的误差范围内,用实验测定的不同氮肥处理的植株总重及籽粒干物质重量与通过模型估算的结果是吻合的。假若施氮水平不高,本模型也能很好的估算出籽粒含氮百分率。此外,还由模型求出了土壤剖面中不同产量潜力,矿化速率及无机氮分布状况等不同组合下的籽粒产量及籽粒含氮百分率的曲线。
This article describes a simple computational model to estimate winter wheat growth and its nitrogen content. According to the results of different experimental designs across the UK, the new statistical theory is applied to verify the reliability of this model. The study found that the total plant weight and dry matter weight of kernels treated with different nitrogen fertilizers were in good agreement with the results estimated by the model within the experimental tolerance. If the level of nitrogen fertilizer is not high, the model can also well estimate the percentage of nitrogen content in grains. In addition, the curves of grain yield and percentage of nitrogen content of grain under different combinations of yield potential, mineralization rate and inorganic nitrogen distribution in soil profile were also obtained from the model.