| 周凌云,陈志雄.封丘地区小麦节水灌溉研究[J].水利学报,1998,29(6):0031-0035 |
| 封丘地区小麦节水灌溉研究 |
| Study on Water-saving irrigation of wheat in Fenqiu region |
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| DOI： |
| 中文关键词: 小麦 灌溉定额 节水灌溉 |
| 英文关键词: irrigation norm wheat water-saving irrigation |
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| 摘要点击次数: 1616 |
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| 中文摘要: |
| 本文对一块66m×100m的雨养麦田连续5个麦季的试验资料分析表明，其雨养麦田产量为3450-5625kg/hm2。根据本区雨养麦田历年水分条件的分布特征，可推定这个产量幅度的出现概率为74.8%。对5个试验麦季的耗水过程进行了分析，得出一条麦田理想的土壤湿度动态曲线，据此提出一个节水灌溉模型.它首先根据麦播期的土壤 有效储水量(Se)和降雨量(R)预报预计灌溉定额，并进行预分配，然后在应用过程 中对灌溉程序进行修正，使其湿度与理想的土壤湿度偏差不超过±50mm。这个模型可比现行的传统灌溉模式节省灌溉用水18%。 |
| 英文摘要: |
| A 5-year experiment on water balance has been conducted in a flat rainfed field with a dimension of 66x100m in Fengqiu, Henan Province in China. Based on the results of the 5-consecutive-year experiments, a reasonable irrigation model of wheat cultivation is suggested according to the principle of maintaining water resources balance. The irrigation program is designed through simulating the ideal soil moisture regime during wheat season. As far as the actual soil moisture is concerned. its deviation from the ideal soil moisture is kept within ± 50mm. If this model put intopractice, a grain yield of 5250kg/hm can be expected under optimal fertilizer application. Compared with the aditional irrigation scheme, the suggested model saves irrigation water by 18%. |
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