| 刘晓英,罗远培,石元春.考虑水分胁迫滞后影响的作物生长模型[J].水利学报,2002,33(6):0032-0038 |
| 考虑水分胁迫滞后影响的作物生长模型 |
| Crop growth model considering lag effect of water stress |
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| DOI： |
| 中文关键词: 滞后影响 水分胁迫 生长模型 冬小麦 根系 叶面积 |
| 英文关键词: lag effect water stress crop growth model winter wheat root leaf area |
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| 中文摘要: |
| 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0.01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. |
| 英文摘要: |
| Based on the dynamics of crop growth a model considering the lag effect of water stress is proposed. The validation of the model is verified by comparing the simulation of winter wheat shoot dry weight with measured data. It is applied to siumlate the root growth and leaf area expansion. Good agreement is attained between the calculated results and measured value. Further study on time-dependent parameters of different dynamic process shows that the lag effect of stress on leaf area is greater than that on shoot growth and effect on growth of shoot is greater than that on root. It means that the lag effect is remarkable in the growth process, which is sensitive to the water stress. |
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