A study of root water uptake of crops indicated by hydrogen and oxygen stable isotopes: A case in Shanxi Province, China

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	A study of root water uptake of crops indicated by hydrogen and oxygen stable isotopes: A case in Shanxi Province, China
	Zhang Yinghua; Han Dongmei; Song Xianfang
	2010
关键词	Cotton Crops Farm buildings Groundwater Hydrogen Hydrogeology Irrigation Oxygen Soil moisture Underwater soils Water management Water supply
英文摘要	Mechanisms of crop root water uptake play an important role in agricultural water management. In this study, stable isotopes were used to understand root water uptake patterns for the main crops (summer corn and cotton) in Shanxi Province, China. Precipitation, irrigation water, soil water, groundwater and stem water were sampled for stable isotopes analyses, and supported by hydrological observations. Both direct inference of hydrogen and oxygen isotopes between stem water and the soil water profile, and multiple-source mass balance assessment were applied to estimate the main depths of root water uptake of crops in different growing seasons. The results show that summer corn and cotton have different root water uptake patterns: summer corn mainly uses the shallow soil water from 0 to 20 cm layer (96-99%) in jointing stage and extending to 20-50 cm (58-85%) in flowering stage, then 0-20 cm (69-76%) again in full ripe stage. In contrast, the main depth of root water uptake of cotton gradually increases during the whole growth stage: from 0 to 20 cm (27-49%) in seedling stage, 20-50 cm (79-84%) in bud stage, 50-90 cm (30-92%) in blooming stage and >90 cm (69-92%) in boll open stage. © 2009 Elsevier B.V. All rights reserved.
出处	Agricultural Water Management
卷	97 期:3 页:475-482
收录类别	EI
语种	英语
内容类型	EI期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24544]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhang Yinghua,Han Dongmei,Song Xianfang. A study of root water uptake of crops indicated by hydrogen and oxygen stable isotopes: A case in Shanxi Province, China. 2010.