干旱区生态环境知识资源中心(Arid): Factors affecting crop water use efficiency: A worldwide meta-analysis

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DOI	10.1016/j.agwat.2019.105878
	Factors affecting crop water use efficiency: A worldwide meta-analysis
	Mbava, N.1; Mutema, M.2; Zengeni, R.1; Shimelis, H.1; Chaplot, V 1,3
通讯作者	Mutema, M.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2020
卷号	228
英文摘要	Water is a limiting natural resource for agricultural production. While it is well accepted that crop types differ in their water use efficiency (WUE), there is no consensus on the main factors affecting WUE of main field crops, which was the motivation of the current study. The effects of rainfall pattern, soil type and climatic regime on crop WUE were evaluated using data from 514 experiments around the world published in ISI journal papers. The results confirmed that crop type had a significant effect (p < 0.05) on WUE with cereals producing on average 2.37 kg of dry grain per cubic meter (m(-3)) of water followed by oilseeds (0.69 kg m(-3)), fibre crops (0.45 kg m(-3)) and legumes (0.42 kg m(-3)). Amongst cereals, maize (3.78 kg m(-3)) and sorghum (2.52 kg m(-3)) were more water-use efficient than wheat (1.02 kg m(-3)), barley (1.21 kg m(-3)) and millet (0.47 kg m(-3)). Overall, maize was the most water use efficient crop under well-watered conditions (9.90 kg m(-3)), but sorghum was the most efficient under dry conditions (5.99 kg m(-3)). WUE of crops increased from desert to tropical through sub-tropical climate. Moreover, WUE tended to correlate positively with soil organic carbon content (r = 0.86) and negatively with clay content (r=-0.78) and soil bulk density (r=-0.85). These results provide information that is important for making decisions on crop selection in a context of increased climate variability and for crop variety development with enhanced WUE. However, there is need for more research to gain more understanding of the mechanisms responsible for the observed trends and causes of the unexplained variability.
英文关键词	Climate variability Crop water use efficiency Crop management Photosynthetic process Soil water availability
类型	Article
语种	英语
国家	South Africa ; France
收录类别	SCI-E
WOS记录号	WOS:000525279000015
WOS关键词	SUBSURFACE DRIP IRRIGATION ; L. VERDC LANDRACE ; SUPPLEMENTAL IRRIGATION ; NITROGEN-FERTILIZATION ; LOESS PLATEAU ; GRAIN-SORGHUM ; WINTER-WHEAT ; YIELD ; GROWTH ; CORN
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/313936
作者单位	1.Univ KwaZulu Natal, SAEES, PB X01, ZA-3209 Pietermaritzburg, South Africa; 2.Agr Res Council, Inst Agr Engn, PB X519, ZA-0127 Pretoria, South Africa; 3.IRD CNRS UPMC MNHN, IRD, Lab Oceanog & Clime Expt & Approches Numer, 4 Pl Jussieu, F-75252 Paris 05, France
推荐引用方式 GB/T 7714	Mbava, N.,Mutema, M.,Zengeni, R.,et al. Factors affecting crop water use efficiency: A worldwide meta-analysis[J]. French National Research Institute for Sustainable Development,2020,228.
APA	Mbava, N.,Mutema, M.,Zengeni, R.,Shimelis, H.,&Chaplot, V.(2020).Factors affecting crop water use efficiency: A worldwide meta-analysis.AGRICULTURAL WATER MANAGEMENT,228.
MLA	Mbava, N.,et al."Factors affecting crop water use efficiency: A worldwide meta-analysis".AGRICULTURAL WATER MANAGEMENT 228(2020).