干旱区生态环境知识资源中心(Arid): 极端干旱区滴灌量对冬小麦水氮利用及根系分布的影响

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	极端干旱区滴灌量对冬小麦水氮利用及根系分布的影响
其他题名	Effect of Drip Irrigation Amount on Water and Nitrogen Usage and Root System Distribution of Winter Wheat under Drought Condition
	汤秋香 1; 林涛 2; 苏秀娟 1; 董文杰 1; 石书兵 1
来源期刊	麦类作物学报
ISSN	1009-1041
出版年	2015
卷号	35 期号:10 页码:1412-1418
中文摘要	为明确新疆南部极端干旱区滴灌小麦的灌水量阈值,在常规沟灌(总灌量为3 750 m~3·hm~(-2))的基础上,设计了四种减量滴灌模式(灌水量分别为3 376、3 000、2 625和2 250 m~3·hm~(-2)),分析了滴灌量对冬小麦产量、水氮利用效率及根系分布的影响。结果表明,土壤无机氮残留量因灌水量不同而异,灌水3 376和2 625 m~3·hm~(-2)时较低;各灌水条件下土壤无机氮残留量均随小麦生育期推进先降后升,在灌浆期达到最高,而后下降。随土层深度的增加,土壤中无机氮含量也逐渐递减。冬小麦水分利用效率随灌水量的增加呈先增后降趋势,灌水量在2 250 ~3 000 m~3·hm~(-2)范围内,随灌水量的增加,水分利用效率先逐步增加,而后下降。小麦根系长度随灌水量的减少呈递减趋势,当灌水量高于或低于3 000 m~3·hm~(-2)时,小麦根系出现早衰现象。
英文摘要	In order to determine the threshold of water supply for winter wheat with drip irrigation and to provide a scientific basis for production, different irrigation experiments were carried out in the extremely arid areas in Southern Xinjiang. In this study, 4 decreasd drip irrigation treatments were conducted as experiment groups (total water volume of growth stage were 3 376, 3 000, 2 625 and 2 250 m~3·hm~(-2)), compared with normal furrow irrigation (total water volume of growth stage was 3 750 m~3·hm~(-2)). This research investigated the yield, water and nitrogen efficiency, and root distribution of different treatments. The result indicated that with the succession of the growing stages, inorganic nitrogen residues in soil showed increased firstly, then decreased, reaching a peak at the filling stage, and then decreased secondly. The inorganic nitrogen showed decreasing trend with the increase of soil depth. Along with the increase of irrigation volume, water use efficiency increased firstly, and then decreased, reaching a peak at 3 000 m~3·hm~(-2). Root length reduced with the decrease of total irrigation volume. The root showed distinctively earlier senescence when the irrigation volume was higher or lower than 3 000 m~3·hm~(-2).
中文关键词	滴灌 ; 冬小麦 ; 水氮利用 ; 根系分布
英文关键词	Drip irrigation Winter wheat Water and nitrogen usage Root system distribution
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5548971
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232997
作者单位	1.新疆农业大学农学院, 乌鲁木齐, 新疆 830052, 中国; 2.新疆农科院经济作物研究所, 乌鲁木齐, 新疆 830091, 中国
推荐引用方式 GB/T 7714	汤秋香,林涛,苏秀娟,等. 极端干旱区滴灌量对冬小麦水氮利用及根系分布的影响[J]. 新疆农业大学,2015,35(10):1412-1418.
APA	汤秋香,林涛,苏秀娟,董文杰,&石书兵.(2015).极端干旱区滴灌量对冬小麦水氮利用及根系分布的影响.麦类作物学报,35(10),1412-1418.
MLA	汤秋香,et al."极端干旱区滴灌量对冬小麦水氮利用及根系分布的影响".麦类作物学报 35.10(2015):1412-1418.