干旱区生态环境知识资源中心(Arid): 微咸水膜下滴灌棉田漫灌洗盐评价

Arid

	微咸水膜下滴灌棉田漫灌洗盐评价
其他题名	Evaluation of soil salts leaching in cotton field after mulched drip irrigation with brackish water by freshwater flooding
	栗现文 1; 靳孟贵 2; 袁晶晶 1; 黄金瓯 1
来源期刊	水利学报
ISSN	0559-9350
出版年	2014
卷号	45 期号:9 页码:1091-1099,1105
中文摘要	合理利用微咸水灌溉对缓解淡水紧缺有重要意义。为评价漫灌对微咸水膜下滴灌棉田地表以下0 ~ 60 cm 深度积盐的淋洗效应,2013年漫灌前、后采用EM38-MK2型电磁感应仪进行大地表观电导率(EC_a)调查,通过取样率定得出对应盐分解译模型。将解译获得的漫灌前、后土壤含盐率作为区域化变量,经K-S检验为正态分布,并分别服从指数和球状半方差函数模型。变程相近而基台值远大于灌前,表明灌后变异程度增强。Kriging 插值结果显示,实际不合理的漫灌方式,使得灌后土壤返盐,0 ~ 60 cm 深度范围积盐增量达4.1*10~4 kg/hm~2。利用HYDRUS-1D建立土壤水盐运移模型模拟优化的灌水定额为360 mm,较实际灌水定额615 mm节水255 mm,脱盐率为39.3 %。持续微咸水灌溉需要完善的农田排水、排盐渠系和盐分排泄区。
英文摘要	Rational use of waters with elevated salinity is likely one option to meet the increased demands of freshwater. A cotton field in southern Xinjiang which was irrigated with brackish water by drip irrigation during the growing season, was subjected to flood irrigation with freshwater after harvest to leach the accumulated salts in the about (0 ~ 60) cm soil zone. To evaluate the efficiency of the flood irrigation, electromagnetic induction EM38- MK2 was applied to measure the apparent soil electrical conductivity (EC_a) before and after the flood irrigation in April 2013. Two sets of samples were collected to calibrate the measured EC_a. The first set of samples which were collected before the application of irrigation to the field consisted of twenty samples while the second set consisted of twenty-four samples and these were also collected after the irrigation. The optimal semi-variance models of before and after the flood irrigation with the approximate range variations were exponential and spherical models, respectively. The still (C_0+C) result obtained after implementing the flood irrigation was much higher than that before the irrigation. Thus, variation of soil salinity was enhanced after the flood irrigation. The spatial distribution of field salinity was interpolated by Kriging method. The inappropriate flood irrigation regime resulted in accumulating soil salts rather than leaching salts for the depth of 0~60 cm. The soil salts increased by 41*10~3 kg/hm~2 after the flood irrigation. Compared to the applied amount of 615 mm, the optimum irrigation regime calculated by the HYDRUS-1D software may save 255 mm of freshwater and leach 39.3% of the soil salts. Sustainable irrigation with brackish water requires that suitable drainage canals and places are made available.
中文关键词	地统计 ; 土壤 ; 地下水 ; 矿化度 ; 干旱区 ; 新疆
英文关键词	geostatistics soil groundwater total dissolved solids(TDS) arid region Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5261653
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231712
作者单位	1.(武汉)中国地质大学环境学院, 武汉, 湖北 430074, 中国; 2.(武汉)中国地质大学环境学院, 生物地质与环境地质国家重点实验室, 武汉, 湖北 430074, 中国
推荐引用方式 GB/T 7714	栗现文,靳孟贵,袁晶晶,等. 微咸水膜下滴灌棉田漫灌洗盐评价[J],2014,45(9):1091-1099,1105.
APA	栗现文,靳孟贵,袁晶晶,&黄金瓯.(2014).微咸水膜下滴灌棉田漫灌洗盐评价.水利学报,45(9),1091-1099,1105.
MLA	栗现文,et al."微咸水膜下滴灌棉田漫灌洗盐评价".水利学报 45.9(2014):1091-1099,1105.