干旱区生态环境知识资源中心(Arid): Comparison of maize water consumption at different scales between mulched and non-mulched croplands

Arid

DOI	10.1016/j.agwat.2019.02.016
	Comparison of maize water consumption at different scales between mulched and non-mulched croplands
	Feng, Yu 1,4; Hao, Weiping 1; Gao, Lili 1; Li, Haoru 1; Gong, Daozhi 1; Cui, Ningbo 2,3
通讯作者	Gong, Daozhi ; Cui, Ningbo
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	216 页码:315-324
英文摘要	Plastic mulch can significantly improve soil water and temperature conditions in croplands, altering ecohydrological processes in agroecosystems. Therefore, analysis of maize water consumption in response to plastic mulch is of importance to agricultural water management. A field experiment was conducted in non-mulched (CK) and mulched (PM) maize fields of eastern Loess Plateau to monitor maize evapotranspiration at different scales. Portable photosynthesis system, sap flow system and eddy covariance systems were utilized to measure transpiration rate at leaf scale, sap flow at plant scale and evapotranspiration (ET) at field scale, respectively. The results indicated PM provided a wetter condition (+2.8% and +4.2% in soil water content for two growing seasons respectively) for maize, leading to higher leaf area index, plant height and aboveground biomass under PM treatment. PM increased leaf transpiration by 9.8%(similar to)33.3% and sap flow by 1.4%(similar to)-34.5% under different weather conditions. However, seasonal ET and the ratio of soil evaporation to ET decreased from 326.3(similar to)341.1 mm and 39.9%(similar to)42.8% under CK to 305.0(similar to)313.9 mm and 23.8%(similar to)34.9% under PM respectively, indicating PM declined seasonal ET and altered ET components, as evaporation decreased while crop transpiration increased. Thus, more water was used for maize growth, finally resulted in significantly higher yield and water use efficiency (p < 0.05). Our results shed light on how plastic mulch saves water and improves water use efficiency, which can provide important information for crop production modeling, water balance evaluation and sustainable management of dryland farming in this area.
英文关键词	Evapotranspiration Sap flow Maize Water use efficiency Rainfed croplands Plastic mulch
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000461262400029
WOS关键词	LOESS PLATEAU ; CROP COEFFICIENT ; USE EFFICIENCY ; WINTER-WHEAT ; SOIL EVAPORATION ; ORGANIC-CARBON ; ENERGY-BALANCE ; SPRING MAIZE ; STRAW MULCH ; ARID REGION
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214008
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, State Engn Lab Efficient Water Use Crops & Disast, Beijing, Peoples R China; 2.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu, Sichuan, Peoples R China; 3.Sichuan Univ, Coll Water Resource & Hydropower, Chengdu, Sichuan, Peoples R China; 4.Univ Hong Kong, Dept Civil Engn, Pokfulam Rd, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Feng, Yu,Hao, Weiping,Gao, Lili,et al. Comparison of maize water consumption at different scales between mulched and non-mulched croplands[J],2019,216:315-324.
APA	Feng, Yu,Hao, Weiping,Gao, Lili,Li, Haoru,Gong, Daozhi,&Cui, Ningbo.(2019).Comparison of maize water consumption at different scales between mulched and non-mulched croplands.AGRICULTURAL WATER MANAGEMENT,216,315-324.
MLA	Feng, Yu,et al."Comparison of maize water consumption at different scales between mulched and non-mulched croplands".AGRICULTURAL WATER MANAGEMENT 216(2019):315-324.