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	Water consumption and water-saving characteristics of a ground cover rice production system
	Jin X. X.; Zuo, Q.; Ma, W. W.; Li, S.; Shi, J. C.; Tao, Y. Y.; Zhang, Y. A.; Liu, Y.; Liu, X. F.; Lin, S.
	2016
关键词	Water consumption Water use efficiency Water balance Transpiration Deep drainage Oryza sativa flooded mulching cultivation north china plain use efficiency lowland rice less water hydraulic conductivity evaporative fraction nitrogen recovery soil properties crop production
英文摘要	The ground cover rice production system (GCRPS) offers a potentially water-saving alternative to the traditional paddy rice production system (TPRPS) by furrow irrigating mulched soil beds and maintaining soils under predominately unsaturated conditions. The guiding hypothesis of this study was that a GCRPS would decrease both physiological and non-physiological water consumption of rice compared to a TPRPS while either maintaining or enhancing production. This was tested in a two-year field experiment with three treatments (TPRPS, GCRPS(sat) keeping root zone average soil water content near saturated, and GCRPS8(0%) keeping root zone average soil water content as 80-100% of field water capacity) and a greenhouse experiment with four treatments (TPRPS, GCRPS(sat), GCRPS(fwc) keeping root zone average soil water content close to field water capacity, and GCRPS(80%)). The water-saving characteristics of GCRPS were analyzed as a function of the measured soil water conditions, plant parameters regarding growth and production, and water input and consumption. In the field experiment, significant reduction in both physiological and non-physiological water consumption under GCRPS lead to savings in irrigation water of similar to 61-84% and reduction in total input water of similar to 35-47%. Compared to TPRPS, deep drainage was reduced similar to 72-88%, evaporation was lessened similar to 83-89% and transpiration was limited similar to 6-10% under GCRPS. In addition to saving water, plant growth and grain yield were enhanced under GCRPS due to increased soil temperature in the root zone. Therefore, water use efficiencies (WUEs), based on transpiration, irrigation and total input water, were respectively improved as much as 27%, 609% and 110% under GCRPS. Increased yield attributed to up to similar to 19%, decreased deep drainage accounted for similar to 75%, decreased evaporation accounted for similar to 14% and reduced transpiration for similar to 5% of the enhancement in WUE of input water under GCRPS, while increased runoff and water storage had negative influence on WUE (-7.5 and-3.7%, respectively) for GCRPS compared to TPRPS. The greenhouse experiment validated the results obtained in the field by simplifying the non-physiological water consumption processes, and thus confirming the relative importance of physiological processes and increased WUE under GCRPS. (C) 2016 Elsevier B.V. All rights reserved.
出处	Journal of Hydrology
卷	540
页	220-231
语种	英语
ISSN号	0022-1694
DOI标识	10.1016/j.jhydrol.2016.06.018
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43013]
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	Jin X. X.,Zuo, Q.,Ma, W. W.,et al. Water consumption and water-saving characteristics of a ground cover rice production system. 2016.

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