Effects of different irrigation methods on micro-environments and root distribution in winter wheat fi elds

	Effects of different irrigation methods on micro-environments and root distribution in winter wheat fi elds
	Lu Guohua 1; Song Jiqing 1; Bai Wenbo 1; Wu Yongfeng 1; Liu Yuan 1; Kang Yaohu 2
刊名	Journal of Integrative Agriculture
	2015
卷号	14 期号:8 页码:1658
ISSN号	2095-3119
英文摘要	The irrigation method used in winter wheat fields affects micro-environment factors, such as relative humidity (RH) within canopy, soil temperature, topsoil bulk density, soil matric potential, and soil nutrients, and these changes may affect plant root growth. An experiment was carried out to explore the effects of irrigation method on micro-environments and root distribution in a winter wheat field in the 2007–2008 and 2008–2009 growing seasons. The results showed that border irrigation (BI), sprinkler irrigation (SI), and surface drip irrigation (SDI) had no significant effects on soil temperature. Topsoil bulk density, RH within the canopy, soil available N distribution, and soil matric potential were significantly affected by the three treatments. The change in soil matric potential was the key reason for the altered root profile distribution patterns. Additionally, more fine roots were produced in the BI treatment when soil water content was low and topsoil bulk density was high. Root growth was most stimulated in the top soil layers and inhibited in the deep layers in the SDI treatment, followed by SI and BI, which was due to the different water application frequencies. As a result, the root profile distribution differed, depending on the irrigation method used. The root distribution pattern changes could be described by the power level variation in the exponential function. A good knowledge of root distribution patterns is important when attempting to model water and nutrient movements and when studying soil-plant interactions.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/75469]
专题	中国科学院地理科学与资源研究所
作者单位	1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences 2.中国科学院地理科学与资源研究所
推荐引用方式 GB/T 7714	Lu Guohua,Song Jiqing,Bai Wenbo,et al. Effects of different irrigation methods on micro-environments and root distribution in winter wheat fi elds[J]. Journal of Integrative Agriculture,2015,14(8):1658.
APA	Lu Guohua,Song Jiqing,Bai Wenbo,Wu Yongfeng,Liu Yuan,&Kang Yaohu.(2015).Effects of different irrigation methods on micro-environments and root distribution in winter wheat fi elds.Journal of Integrative Agriculture,14(8),1658.
MLA	Lu Guohua,et al."Effects of different irrigation methods on micro-environments and root distribution in winter wheat fi elds".Journal of Integrative Agriculture 14.8(2015):1658.