干旱区生态环境知识资源中心(Arid): Effects of water salinity and N application rate on water- and N-use efficiency of cotton under drip irrigation

Arid

	Effects of water salinity and N application rate on water- and N-use efficiency of cotton under drip irrigation
	Min Wei; Hou Zhenan; Ma Lijuan; Zhang Wen; Ru Sibo; Ye Jun
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:4 页码:454-467
英文摘要	In arid and semi-arid regions, freshwater scarcity and high water salinity are serious and chronic problems for crop production and sustainable agriculture development. We conducted a field experiment to evaluate the effect of irrigation water salinity and nitrogen(N) application rate on soil salinity and cotton yield under drip irrigation during the 2011 and 2012 growing seasons. The experimental design was a 3*4 factorial with three irrigation water salinity levels(0.35, 4.61 and 8.04 dS/m) and four N application rates(0, 240, 360 and 480 kg N/hm~2). Results showed that soil water content increased as the salinity of the irrigation water increased, but decreased as the N application rate increased. Soil salinity increased as the salinity of the irrigation water increased. Specifically, soil salinity measured in 1:5 soil:water extracts was 218% higher in the 4.61 dS/m treatment and 347% higher in the 8.04 dS/m treatment than in the 0.35 dS/m treatment. Nitrogen fertilizer application had relatively little effect on soil salinity, increasing salinity by only 3%-9% compared with the unfertilized treatment. Cotton biomass, cotton yield and evapotranspiration(ET) decreased significantly in both years as the salinity of irrigation water increased, and increased as the N application rate increased regardless of irrigation water salinity; however, the positive effects of N application were reduced when the salinity of the irrigation water was 8.04 dS/m. Water use efficiency(WUE) was significantly higher by 11% in the 0.35 dS/m treatment than in the 8.04 dS/m treatment. There was no significant difference in WUE between the 0.35 dS/m treatment and the 4.61 dS/m treatment. The WUE was also significantly affected by the N application rate. The WUE was highest in the 480 kg N/hm~2 treatment, being 31% higher than that in the 0 kg N/hm~2 treatment and 12% higher than that in the 240 kg N/hm~2 treatment. There was no significant difference between the 360 and 480 kg N/hm~2 treatments. The N use efficiency(NUE) was significantly lower in the 8.04 dS/m treatment than in either the 4.61 dS/m or the 0.35 dS/m treatment. There was no significant difference in NUE between the latter two treatments. These results suggest that irrigation water with salinity <4.61 dS/m does not have an obvious negative effect on cotton production, WUE or NUE under the experimental conditions. Application of N fertilizer(0-360 kg N/hm~2) could alleviate salt damage, promote cotton growth, and increase both cotton yield and water use efficiency.
英文关键词	saline water nitrogen soil salinity cotton water use efficiency nitrogen use efficiency
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5169100
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335366
作者单位	Min Wei, Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China.; Hou Zhenan, Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China.; Ma Lijuan, Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China.; Zhang Wen, Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China.; Ru Sibo, Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China.; Ye Jun, Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China.
推荐引用方式 GB/T 7714	Min Wei,Hou Zhenan,Ma Lijuan,et al. Effects of water salinity and N application rate on water- and N-use efficiency of cotton under drip irrigation[J],2014,6(4):454-467.
APA	Min Wei,Hou Zhenan,Ma Lijuan,Zhang Wen,Ru Sibo,&Ye Jun.(2014).Effects of water salinity and N application rate on water- and N-use efficiency of cotton under drip irrigation.Journal of Arid Land,6(4),454-467.
MLA	Min Wei,et al."Effects of water salinity and N application rate on water- and N-use efficiency of cotton under drip irrigation".Journal of Arid Land 6.4(2014):454-467.