| 节灌控排条件下氮磷迁移转化规律研究 |
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| 引用本文： | 乔 欣,邵东国,刘欢欢,袁俊光.节灌控排条件下氮磷迁移转化规律研究[J].水利学报,2011,42(7). |
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| 作者姓名： | 乔 欣 邵东国 刘欢欢 袁俊光 |
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| 作者单位： | 1. 武汉大学水资源与水电工程科学国家重点实验室,湖北武汉,430072
2. 湖北省水利厅,湖北武汉,430072 |
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| 基金项目： | 教育部科学技术研究重大项目(308017); 国家高技术研究发展计划(863计划)(2006AA06Z342); “十一五”国家科技支撑计划(2006BAD11B08); 国家自然科学基金项目(50679068) |
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| 摘 要： | 针对我国灌排面积不断增加、水资源利用效率不高、化肥流失严重等问题,结合田间对比试验,考虑节水灌溉与控制排水的协同效应,通过控制变量法研究灌排因素对排水量、氮磷流失量的影响和土壤水中氮磷迁移转化规律,发现：浅灌深蓄（G1）模式下控制排水（L1）的排水量较非控制排水（L2）的排水量减少了7.59%,浅勤灌溉（G2）模式下L1的排水量较L2处理下减少了8.44%;同时L1处理下NO3--N、NH4＋-N、TN、TP流失量分别比L2处理下的流失量减少了34.08%、7.11%、11.31%、56.4%。由此可知,控制排水对减少排水量和氮磷流失量具有明显的效果,G1L1的灌排组合更有利于控制田间排水量、减少氮磷流失。
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| 关 键 词： | 水稻灌区 灌排协同效应 排水量 氮磷流失量 迁移转化规律 |
Study on the moving and transforming law of N and P under water-saving irrigation and controlled drainage |
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| QIAO Xin,SHAO Dong-guo,LIU Huan-huan and YUAN Jun-guang.Study on the moving and transforming law of N and P under water-saving irrigation and controlled drainage[J].Journal of Hydraulic Engineering,2011,42(7). |
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| Authors: | QIAO Xin SHAO Dong-guo LIU Huan-huan and YUAN Jun-guang |
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| Affiliation: | QIAO Xin1,SHAO Dong-guo1,LIU Huan-huan1,YUAN Jun-guang2(1.Wuhan University,Wuhan 430072,China,2.Hubei Provincial Department of Water Resources,China) |
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| Abstract: | A series of field contrast experiments were conducted in rice area of south China.Based on these experiments,this paper investigates the displacement,N and P losses,and the moving and transforming law of N and P under different treatment of irrigation and drainage,which considers the synergistic effects of water-saving irrigation and controlled drainage as well as the uses of control variate method.The results show that under shallow-irrigation and deep-sluice model(G1),the water discharge of controlled dra... |
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| Keywords: | rice irrigated area synergistic effects of irrigation and drainage displacement excretion of nitrogen and phosphorus moving and transforming law |
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