| 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): |
| 节灌控排条件下氮磷迁移转化规律研究 |
| Study on the moving and transforming law of N and P under water-saving irrigation and controlled drainage |
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| DOI： |
| 中文关键词: 水稻灌区 灌排协同效应 排水量 氮磷流失量 迁移转化规律 |
| 英文关键词: rice irrigated area synergistic effects of irrigation and drainage displacement excretion of nitrogen and phosphorus moving and transforming law |
| 基金项目: |
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| 摘要点击次数: 1998 |
| 全文下载次数: 492 |
| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 ef?
fects 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 drainage（L1）decreases 7.59% compared with uncontrolled drainage（L2） . While under the shallow-wet irrigation（G2），the displacement of L1 decreases 8.44% compared with L2. In the mean time，the losses of NO3--N，NH4+-N，TN，TP on L1 decr-ease separately 34.08%，7.11%，11.31%，56.4% compared with（L2） . Therefore，controlled drainage is helpful to reduce the displacement and N and P losses. The irrigation and drainage combination of G1L1 is more conducive to control water displacement，reduce the losses of nitrogen and phosphorus. |
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