Root growth, available soil water, and water-use efficiency of winter wheat under different irrigation regimes applied at different growth stages in North China
Root growth, available soil water, and water-use efficiency of winter wheat under different irrigation regimes applied at different growth stages in North China
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DOI：
10.1016/j.agwat.2010.05.025
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发表时间：
2010-10-01
影响因子：
6.7
通讯作者：
Zhang Jiwang
中科院分区：
文献类型：
--
作者：
Li Quanqi;Dong Baodi;Zhang Jiwang
于2006-2007年和2007-2008年冬小麦生长季在中国科学院栾城农业生态系统试验站进行了田间试验。在冬小麦拔节期、抽穗期和灌浆期分别进行1次、2次和3次灌水试验，灌水总量保持在120 mm，结果表明：冬小麦生育后期灌水和灌水频率的增加使土壤有效水减少;这主要是由于根长密度的垂直分布发生了变化。在30 cm土层中，拔节期灌水1次的根长密度最高。蒸散量（ET）差异不显著（LSD，P
Field experiments were conducted at the Luancheng Agro-Ecosystem Experimental Station of the Chinese Academy of Sciences during the winter wheat growing seasons in 2006-2007 and 2007-2008. Experiments involving winter wheat with 1, 2, and 3 irrigation applications at jointing, heading, or milking were conducted, and the total irrigation water supplied was maintained at 120 mm. The results indicated that irrigation during the later part of the winter wheat growing season and increase in irrigation frequency decreased the available soil water; this result was mainly due to the changes in the vertical distribution of root length density. In 30-cm-deep soil profiles, 1 time irrigation at jointing resulted in the highest root length density. With regard to evapotranspiration (ET), there was no significant (LSD, P