干旱区生态环境知识资源中心(Arid): Root length density distribution and associated soil water dynamics for tomato plants under furrow irrigation in a solar greenhouse

Arid

	Root length density distribution and associated soil water dynamics for tomato plants under furrow irrigation in a solar greenhouse
	Qiu Rangjian; Du Taisheng; Kang Shaozhong
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2017
卷号	9 期号:5 页码:637-650
英文摘要	Furrow irrigation is a traditional widely-used irrigation method in the world. Understanding the dynamics of soil water distribution is essential to developing effective furrow irrigation strategies, especially in water-limited regions. The objectives of this study are to analyze root length density distribution and to explore soil water dynamics by simulating soil water content using a HYDRUS-2D model with consideration of root water uptake for furrow irrigated tomato plants in a solar greenhouse in Northwest China. Soil water contents were also in-situ observed by the ECH_2O sensors from 4 June to 19 June and from 21 June to 4 July, 2012. Results showed that the root length density of tomato plants was concentrated in the 0-50 cm soil layers, and radiated 0-18 cm toward the furrow and 0-30 cm along the bed axis. Soil water content values simulated by the HYDRUS-2D model agreed well with those observed by the ECH_2O sensors, with regression coefficient of 0.988, coefficient of determination of 0.89, and index of agreement of 0.97. The HYDRUS-2D model with the calibrated parameters was then applied to explore the optimal irrigation scheduling. Infrequent irrigation with a large amount of water for each irrigation event could result in 10%-18% of the irrigation water losses. Thus we recommend high irrigation frequency with a low amount of water for each irrigation event in greenhouses for arid region. The maximum high irrigation amount and the suitable irrigation interval required to avoid plant water stress and drainage water were 34 mm and 6 days, respectively, for given daily average transpiration rate of 4.0 mm/d. To sum up, the HYDRUS-2D model with consideration of root water uptake can be used to improve irrigation scheduling for furrow irrigated tomato plants in greenhouses in arid regions.
英文关键词	root length density distribution HYDRUS-2D model soil water content irrigation scheduling greenhouse
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:6061092
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335852
作者单位	Qiu Rangjian, Nanjing University of Information Science and Technology, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters;;Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing, Jiangsu 210044, China.; Du Taisheng, Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China.; Kang Shaozhong, Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China.; 210044.; 100083.; 100083.
推荐引用方式 GB/T 7714	Qiu Rangjian,Du Taisheng,Kang Shaozhong. Root length density distribution and associated soil water dynamics for tomato plants under furrow irrigation in a solar greenhouse[J],2017,9(5):637-650.
APA	Qiu Rangjian,Du Taisheng,&Kang Shaozhong.(2017).Root length density distribution and associated soil water dynamics for tomato plants under furrow irrigation in a solar greenhouse.Journal of Arid Land,9(5),637-650.
MLA	Qiu Rangjian,et al."Root length density distribution and associated soil water dynamics for tomato plants under furrow irrigation in a solar greenhouse".Journal of Arid Land 9.5(2017):637-650.