| 摘要: |
| 通过室内试验,对局部控制地下浸润灌溉不同处理下的土壤水分运动进行了观测分析,并用幂函数对不同处理下湿润锋入渗距离及入渗速率与入渗时间之间的关系进行了拟合,用Kostiakov入渗模型建立了局部控制地下浸润灌溉中累计入渗量与累计入渗时间之间的关系,同时确定了局部控制地下浸润灌溉合理的技术要素组合范围。结果表明,所有处理条件下湿润锋的推移及土壤入渗速率与入渗时间均呈显著或较显著的幂函数关系;Kostiakov入渗模型能准确地描述局部控制地下浸润灌溉中累计入渗量与累计入渗时间之间的关系;局部控水浸润灌溉合理的技术要素组合为:淹没高度为7～9 cm,适宜开孔率为14%左右,灌水下限不低于70%田间持水率。 |
| 关键词: 局部控制地下浸润灌溉 湿润峰入渗速率 累计入渗量 技术要素 |
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| 基金项目:国家自然科学基金项目（50479051） |
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| Experiment on soil infiltration properties under water-controlled partial wetting irrigation |
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| Abstract: |
| Through laboratory experiment,we analyzed the soil water movement under different treatments of water-controlled partial wetting irrigation,fitting analyzed the relationship between the inflitration distance of wetting front and infiltration time and infiltration rate under different treatments by using power function,and established the relationship between the cumulative infiltration and cumulative time with Kostiakov infiltration model.Meanwhile,we obtained the technique parameters assembly range of water-controlled partial wetting irrigation.The results indicated that,we can use Kostiakov infiltration model to describe the relationship between the cumulative infiltration and cumulative time accurately;the technique parameters assembly range of water-controlled partial wetting irrigation was:the suitable perforation ratio is about 14%,the submergence height is 7-9 cm,and the irrigation low limit is above 70%. |
| Key words: water-controlled partial wetting irrigation,wetting front,infiltration rate,cumulative infiltration,technique parameters |
