农田干缩裂隙对微润灌土壤水氮运移及分布的影响
S275.9; 为了揭示微润灌溉模式下农田干缩裂隙特征对土壤水分及氮素运移的影响,研究了裂隙深度(5、10和15 cm)和裂隙面积率(7.5％和12.5％)交互影响下土壤水氮的运移规律.结果表明:针对裂隙处理组,裂隙深度为15 cm、裂隙面积率为12.5％的处理组湿润锋垂直向上运移距离最大,水平运移距离最小;裂隙深度为5 cm、面积率为7.5％的处理组湿润锋垂直向上运移距离最小,水平运移距离最大;裂隙深度为15 cm、面积率为12.5％的处理组累积入渗量最大,入渗120 h达14366.67 mL.裂隙流累积入渗量随时间的变化关系均服从Kostiakov入渗经验模型,拟合呈显著水平;靠近微润管...
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| Published in | 节水灌溉 no. 7; pp. 15 - 21 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
河海大学农业科学与工程学院,南京211100%河海大学水利水电学院,南京210098%南京市水利规划设计院股份有限公司,南京210000
10.07.2022
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1007-4929 |
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| Abstract | S275.9; 为了揭示微润灌溉模式下农田干缩裂隙特征对土壤水分及氮素运移的影响,研究了裂隙深度(5、10和15 cm)和裂隙面积率(7.5％和12.5％)交互影响下土壤水氮的运移规律.结果表明:针对裂隙处理组,裂隙深度为15 cm、裂隙面积率为12.5％的处理组湿润锋垂直向上运移距离最大,水平运移距离最小;裂隙深度为5 cm、面积率为7.5％的处理组湿润锋垂直向上运移距离最小,水平运移距离最大;裂隙深度为15 cm、面积率为12.5％的处理组累积入渗量最大,入渗120 h达14366.67 mL.裂隙流累积入渗量随时间的变化关系均服从Kostiakov入渗经验模型,拟合呈显著水平;靠近微润管附近处土壤含水率变化梯度较小,趋近裂隙处较大;土壤裂隙越深、面积率越大则同一深度下土壤含水率、铵态氮和硝态氮含量越高.土壤裂隙面积率和深度的变化对微润灌湿润锋运移距离、累积入渗量、入渗速率以及入渗后的土壤含水率、铵态氮和硝态氮含量均存在显著影响.研究结果旨在揭示裂隙特征对微润灌溉水氮运移的影响,以期为微润灌优化设计控制方案等提供理论依据. |
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| AbstractList | S275.9; 为了揭示微润灌溉模式下农田干缩裂隙特征对土壤水分及氮素运移的影响,研究了裂隙深度(5、10和15 cm)和裂隙面积率(7.5％和12.5％)交互影响下土壤水氮的运移规律.结果表明:针对裂隙处理组,裂隙深度为15 cm、裂隙面积率为12.5％的处理组湿润锋垂直向上运移距离最大,水平运移距离最小;裂隙深度为5 cm、面积率为7.5％的处理组湿润锋垂直向上运移距离最小,水平运移距离最大;裂隙深度为15 cm、面积率为12.5％的处理组累积入渗量最大,入渗120 h达14366.67 mL.裂隙流累积入渗量随时间的变化关系均服从Kostiakov入渗经验模型,拟合呈显著水平;靠近微润管附近处土壤含水率变化梯度较小,趋近裂隙处较大;土壤裂隙越深、面积率越大则同一深度下土壤含水率、铵态氮和硝态氮含量越高.土壤裂隙面积率和深度的变化对微润灌湿润锋运移距离、累积入渗量、入渗速率以及入渗后的土壤含水率、铵态氮和硝态氮含量均存在显著影响.研究结果旨在揭示裂隙特征对微润灌溉水氮运移的影响,以期为微润灌优化设计控制方案等提供理论依据. |
| Author | 刘俊 张展羽 齐伟 王策 徐嘉惠 |
| AuthorAffiliation | 河海大学农业科学与工程学院,南京211100%河海大学水利水电学院,南京210098%南京市水利规划设计院股份有限公司,南京210000 |
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| Author_FL | ZHANG Zhan-yu XU Jia-hui WANG Ce LIU Jun QI Wei |
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| DocumentTitle_FL | Effects of Farmland Desiccation Crack on Water and Nitrogen Transport and Distribution Under Moistube Irrigation |
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| Keywords | 微润灌 累积入渗量 铵态氮 土壤含水率 土壤裂隙 硝态氮 |
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| Publisher | 河海大学农业科学与工程学院,南京211100%河海大学水利水电学院,南京210098%南京市水利规划设计院股份有限公司,南京210000 |
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| Snippet | S275.9; 为了揭示微润灌溉模式下农田干缩裂隙特征对土壤水分及氮素运移的影响,研究了裂隙深度(5、10和15 cm)和裂隙面积率(7.5％和12.5％)交互影响下土壤水氮的运移规律.结果表明:针对裂隙处理组,裂隙深度为15... |
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| Title | 农田干缩裂隙对微润灌土壤水氮运移及分布的影响 |
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