| 彭世彰,索丽生.节水灌溉条件下作物系数和土壤水分修正系数试验研究[J].水利学报,2004,35(1):0017-0021 |
| 节水灌溉条件下作物系数和土壤水分修正系数试验研究 |
| Water requirement model for crop under the condition of water-saving irrigation |
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| DOI： |
| 中文关键词: 作物蒸发蒸腾 作物系数 土壤水分修正系数 模型 |
| 英文关键词: crop evaportranspiration crop coefficient modified soil moisture coefficient water requirement water-saving irrigation |
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| 中文摘要: |
| 考虑土壤水分调控所产生的作物生长滞后效应与补偿生长效应，对节水灌溉条件下作物蒸发蒸腾量ETc的理论计算模型进行了研究。根据灌溉试验资料，确定了冬小麦、夏玉米、棉花及水稻作物的作物系数Kc，得出节水灌溉条件下主要农作物土壤水分修正系数Ks的计算公式。覆膜旱作节水灌溉模式的水稻需水量计算实例结果显示，计算值与实测值较为吻合，模型具有较高的精度。 |
| 英文摘要: |
| The theoretical calculation model for evapotranspiration of crop under the condition of water-saving irrigation is studied. The hysteresis effect due to soil moisture regulation and the compensation effect of crop growing are taken into consideration. The crop coefficient Ks for winter wheat, summer crop, cotton and paddy are obtained from the field observation data respectively. On this basis, the formula for modified soil moisture coefficient Ks under the condition of water-saving irrigation is deduced. The calculated water requirement for paddy in plastic film mulched dry land is in accordance with experimental data. |
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