A dynamic model for the effects of potassium and nitrogen fertilizers on the growth and nutrient uptake of crops
A dynamic model for the effects of potassium and nitrogen fertilizers on the growth and nutrient uptake of crops
复制标题
钾肥和氮肥对作物生长和养分吸收影响的动态模型
DOI：
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复制
发表时间：
1976
影响因子：
0.6
通讯作者：
T. Cleaver
中科院分区：
文献类型：
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作者：
A. Barnes;D. J. Greenwood;T. Cleaver
总结已经推导出一个动态模型来预测在不同氮和钾肥水平下田间生长的作物的生长和营养成分的日常变化。方程包括在模型中表示的过程，如重新分配的养分下降的土壤剖面降雨或蒸散后，各种形式的钾之间的转换，钾离子的运输通过土壤的根和生长和养分吸收的依赖传入的辐射，植物成分，和土壤水分胁迫。该模型进行了测试，用它来预测的测试作物，卷心菜，肥料在四个独立的田间试验在WeUesbourne的反应。根据描述初始土壤条件和植物重量、土壤和作物特性以及每日天气条件的数据，该模型正确地预测了每个实验中的响应模式，尽管在某些情况下理论产量和实验产量的绝对值略有不同。特别重要的是，该模型能够预测不同天气条件对作物反应的影响，以及N和K肥料对植物生长和化学成分的影响之间的相互作用。
Summary A dynamic model has been derived to predict the day-to-day changes in the growth and nutrient composition of crops grown in the field with different levels of nitrogen and potassium fertilizer. Equations are included in the model to represent processes such as re-distribution of nutrients down the soil profile after rain or evapotranspiration, transformations between the various forms of potassium, transport of potassium ions through the soil to the roots and the dependence of growth and nutrient uptake on incoming radiation, plant composition, and soil water stress. The model was tested by using it to forecast the responses of a test crop, cabbage, to fertilizers in four separate field experiments at WeUesbourne. From data describing the initial soil conditions and weights of the plant, the soil and crop characteristics and the daily weather conditions, the model correctly predicted the pattern of responses in each experiment, although, in some instances the absolute values of the theoretical and experimental yields differed somewhat. Of special significance was the ability of the model to forecast the effects of different weather conditions on crop response and the interactions between the effects of N and K fertilizers on the growth and chemical composition of plants.