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	Effect of brackish water irrigation and straw mulching on soil salinity and crop yields under monsoonal climatic conditions
	Pang, Huan-Cheng1; Li, Yu-Yi1; Yang, Jin-Song2; Liang, Ye-Sen1
刊名	AGRICULTURAL WATER MANAGEMENT
	2010-11-15
卷号	97期号:12页码:1971-1977
关键词	Accumulation Salt balance Soil Winter wheat Summer maize
ISSN号	0378-3774
DOI	10.1016/j.agwat.2009.08.020
通讯作者	Li, Yu-Yi(yuyili@caas.ac.cn)
英文摘要	Fresh water shortages are severally restricting sustainable agriculture development in the North China Plain. The scarcity of fresh water has forced farmers to use brackish water from shallow underground sources, which helps to overcome drought and increase crop yields but also increases the risk of soil salinization. To identify safe and effective ways of using brackish water in this region, field experiments were conducted to evaluate the effect of brackish water irrigation and straw mulching on soil salinity and crop yield in a winter wheat-summer maize double cropping system. The experiment was in a split-plot design. Six rates of straw mulching (0, 4.5, 6.0, 7.5, 15.0 and 30.0 Mg/ha) were assigned to the main plots and two irrigation water qualities (i.e. brackish water with salt content of 3.0-5.0 g/L and fresh water with only 1.27 g salt/L) were applied to subplots. The brackish water irrigation significantly increased the salt content at different soil depths in the upper 1 m soil layer during the two growing seasons. Straw mulching affected the vertical distribution of salt in the brackish water irrigation plots and the average salt content of straw mulch treatments (4.5, 6.0, 7.5, 15.0 and 30.0 Mg/ha) within the 0-20. 20-40 and 0-100 cm soil depths was 10.2, 14.0 and 1.8% lower than that without straw mulch (A(0)). No salt accumulation occurred to a depth of 1 m in the brackish water irrigation plots and there was no correlation between the value of SAS (salt accumulated in 1 m of soil) and straw mulch rate. In 2000 and 2001, the salt content within the 0-40 cm soil layer in brackish water irrigation plots increased due to high evaporation rates during April-June, and then decreased up to September as salts were leached by rain. For the fresh water irrigation plots, the salt content remained relatively stable. Straw mulching affected the salt content in the 0-40 cm soil layer in brackish water irrigation plots in different periods of 2000 and 2001, but no correlation between salt content and straw mulch rates was observed except in September of 2000. Unlike for wheat, the yield of maize increased as the straw mulch rate increased according to the equation, y = 0.1589x + 5.3432 (R(2) = 0.6506). Our results would be helpful in adopting brackish water irrigation and straw mulching in ways that enhance crop yields and reduce the risk of soil salinization. However, long-term effects of brackish water irrigation and straw mulching on soil salinity and crop yield need to be further evaluated for sustainability of the system. (C) 2009 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	DRAINAGE WATER ; DISPOSAL ; REUSE
WOS研究方向	Agriculture ; Water Resources
WOS类目	Agronomy ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000284253500005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558824
专题	南京土壤研究所
通讯作者	Li, Yu-Yi
作者单位	1.Chinese Acad Agr Sci, Inst Agroresources & Reg Planning, MOA, Key Lab Plant Nutr & Nutrient Cycling, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Pang, Huan-Cheng,Li, Yu-Yi,Yang, Jin-Song,et al. Effect of brackish water irrigation and straw mulching on soil salinity and crop yields under monsoonal climatic conditions[J]. AGRICULTURAL WATER MANAGEMENT,2010,97(12):1971-1977.
APA	Pang, Huan-Cheng,Li, Yu-Yi,Yang, Jin-Song,&Liang, Ye-Sen.(2010).Effect of brackish water irrigation and straw mulching on soil salinity and crop yields under monsoonal climatic conditions.AGRICULTURAL WATER MANAGEMENT,97(12),1971-1977.
MLA	Pang, Huan-Cheng,et al."Effect of brackish water irrigation and straw mulching on soil salinity and crop yields under monsoonal climatic conditions".AGRICULTURAL WATER MANAGEMENT 97.12(2010):1971-1977.

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