干旱区生态环境知识资源中心(Arid): 不同水质膜下滴灌棉田盐分空间变异特征

Arid

	不同水质膜下滴灌棉田盐分空间变异特征
其他题名	Spatial Variability of Cotton Field Salinity under Mulched Drip Irrigation with Brackish and Fresh Water
	栗现文; 靳孟贵
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2014
卷号	45 期号:11 页码:180-187
中文摘要	为评价不同水质膜下滴灌棉田土壤盐分空间分布及变异性,采用EM38-MK2型电磁感应仪对微咸及淡水滴灌田块进行盐分调查。解译模型获得的土壤含盐质量比描述性统计特征表明,微咸水滴灌的积盐程度高于淡水滴灌,但其变异系数相对较小。采用GS+软件拟合最优半方差函数模型,微咸水处理为指数模型,淡水处理为高斯模型,均表现为强的空间相关性;微咸水处理变程大于淡水处理,增加了土壤盐分的空间相依性。Kriging空间插值及变异分析表明,淡水滴灌棉田土壤盐分微域及全域空间变异程度强于微咸水滴灌,二者均存在影响棉花出苗的盐斑。建议用水紧张时,可基于EM38-MK2型电磁感应仪的盐分调查结果,重点淋洗盐斑集中分布区域,以节水增产。
英文摘要	Shallow brackish water is widely distributed throughout north and northwest China and could be rational used. To evaluate the spatial distribution and variability of cotton field salinity under mulched drip irrigation with brackish and fresh water in southern Xinjiang, electromagnetic induction EM38-MK2 was applied to measure the apparent soil electrical conductivity. Statistical characteristics of soil salinity from the interpretation models of soil salinity showed that the scenario of brackish water irrigation had the higher salinity level and the lower variation coefficient than the fresh water irrigation. The optimal semi-variance models of brackish water and fresh water irrigation were exponential and Gaussian models respectively. Both models were characterized by strong spatial correlation. Compared with fresh water irrigation, the scenario of brackish water irrigation with the higher salinity level had the lager range variation and increased the spatial dependency of soil salinity. The spatial distribution of field salinity interpolated by Kriging method showed that both scenarios of brackish and fresh water irrigation had some filed parts with high salinity level, which would affect cotton emergence. EM38-MK2 would be suggested to investigate the field salinity distribution. According to soil salinity levels of different parts, amount of fresh water of flood irrigation for leaching salinity could be defined to save water and ensure the agriculture production.
中文关键词	微咸水 ; 膜下滴灌 ; 干旱区 ; 空间变异 ; 电磁感应 ; 半方差函数
英文关键词	Brackish water Mulched drip irrigation Arid region Spatial variability Electromagnetic induction Semi-variance function
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:5292953
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231513
作者单位	(武汉)中国地质大学环境学院, 武汉, 湖北 430074, 中国
推荐引用方式 GB/T 7714	栗现文,靳孟贵. 不同水质膜下滴灌棉田盐分空间变异特征[J],2014,45(11):180-187.
APA	栗现文,&靳孟贵.(2014).不同水质膜下滴灌棉田盐分空间变异特征.农业机械学报,45(11),180-187.
MLA	栗现文,et al."不同水质膜下滴灌棉田盐分空间变异特征".农业机械学报 45.11(2014):180-187.