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本文以作物生长动力学原理为基础 ,提出了一种可以考虑土壤水分滞后影响的作物生长模型 .经与实测的小麦冠部干物质积累动态相比较 ,模拟与实测值吻合良好 ,在 0 0 1置信水平下达到极显著相关 ,说明本文所建模型结构正确合理 .将模型进一步应用于冬小麦生长的另外两个动态过程一根系生长和叶面积扩展 ,模拟与实测值均吻合良好 ,表明模型具有一定普遍意义 .不同动态过程滞后影响时变参数对比显示 ,水分胁迫对叶面积的滞后影响大于对冠生长的滞后影响 ,对冠生长的滞后影响又大于对根系生长的滞后影响 ,表明对水分胁迫越敏感的作物生长过程 ,水分胁迫对它的滞后影响也越大 .早期胁迫比后期胁迫对作物的滞后影响相对较小
Based on the principle of crop growth kinetics, a crop growth model that can consider the influence of soil moisture hysteresis was proposed. Compared with the measured dynamic changes of crown dry matter accumulation, the simulated data agree well with the measured data. Confidence level reached very significant correlation, indicating that the model structure is correct and reasonable.This model is further applied to the growth of two other dynamic processes of winter wheat growth and leaf area expansion, the simulation and the measured values are in good agreement, indicating that the model has a certain General significance.Comparison of time-varying parameters of different dynamic process lag shows that the influence of water stress on the lag of leaf area is greater than the lag effect on crown growth, and the lag effect on crown growth is greater than the lag effect on root growth, indicating that for water stress Sensitive to the process of crop growth, water stress has a greater impact on its lag.Early stress than the latter part of the delay on the impact of the crop is relatively small