| 塔里木灌区膜下滴灌的棉田土壤水盐分布特征 |
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| 引用本文： | 赵成义,闫映宇,李菊艳,盛钰,伊力哈木·伊马木.塔里木灌区膜下滴灌的棉田土壤水盐分布特征[J].干旱区地理,2009,32(6). |
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| 作者姓名： | 赵成义 闫映宇 李菊艳 盛钰 伊力哈木·伊马木 |
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| 作者单位： | 1. 中国科学院新疆生态与地理研究所,绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐,830011
2. 中国科学院新疆生态与地理研究所,绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐,830011;新疆水土保持生态环境监测总站,新疆乌鲁木齐,830000 |
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| 基金项目： | 国家973项目(2009CB421302); 国家科技支撑计划项目(2007BAC03A0604); 中科院创新项目(KZCX2-YW-127)资助 |
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| 摘 要： | 通过膜下滴灌田间试验,研究了塔里木灌区棉田土壤盐分运移特征。结果表明:膜下滴灌的棉田土壤盐分呈Y状垂直分布,膜下土壤盐分含量小于膜间,膜间土壤盐分从表层到深层呈逐渐增减的趋势。随滴灌量增加,膜下土壤盐分峰值位置下移。滴灌量从2 618 m3/hm2增大到4 265m3/hm2,湿润峰位置从40 cm下移至100 cm,盐分峰值位置从30 cm下移至60 cm。滴灌结束后,膜下0~60 cm及0~100 cm土壤平均含盐量均减小。脱盐程度随滴灌量增大而增加,0~60 cm土层脱盐率从6.0%增加到34.8%;而膜间土壤呈积盐状态,积盐程度随滴灌量减小而增大。随滴灌年限增加,0~60 cm的土层平均含盐量逐年增加,从2005年到2007年,4 265、3 926、3 600、3 271m3/hm2灌溉定额下的土壤平均含盐量年均增加了0.4、0.6、1.1、1.1 g/kg。研究结果指出了塔里木灌区现行棉花膜下滴灌制度存在的积盐问题,成果对完善干旱区膜下滴灌灌溉制度具有一定得指导意义。
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| 关 键 词： | 膜下滴灌 棉花 土壤盐分 运移 塔里木灌区 |
Distributed characteristics of soil water-salt of cotton field under drip irrigation under mulching in Tarim Irrigated Area |
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| ZHAO Cheng-yi,YAN Ying-yu,LI Ju-yan,SHENG Yu,Yilihamu YIMAMU.Distributed characteristics of soil water-salt of cotton field under drip irrigation under mulching in Tarim Irrigated Area[J].Arid Land Geography,2009,32(6). |
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| Authors: | ZHAO Cheng-yi YAN Ying-yu LI Ju-yan SHENG Yu Yilihamu YIMAMU |
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| Institution: | ZHAO Cheng-yi1,YAN Ying-yu1,2,LI Ju-yan1,SHENG Yu1,Yilihamu YIMAMU1(1 Key Laboratory of Oasis Ecology and Desert Environment,Xinjiang Institute of Ecology and Geography,CAS,Urumqi 830011,Xinjiang,China,2 General Station of Water and Soil Conversation and Eco-environmental Monitoring of Xinjiang,Urumqi 830000,China) |
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| Abstract: | The problem of soil salt accumulation under drip irrigation under mulching has become more and more severe in arid area.Based on the field experiment,the distributed characteristics of soil water and salt of cotton field were studied under drip irrigation under mulching in Tarim Irrigated Area.The results showed that soil salt presented Y-shaped distribution in soil profile.The soil salt content under mulch was less than inter-mulch lands,presenting a characteristic of low at two ends and high at the middle... |
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| Keywords: | drip irrigation under mulching cotton soil salt movement Tarim Irrigated Area |
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