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Water use and crop coefficient of the wheat-maize strip intercropping system for an arid region in northwestern China
Wang, Zikui1,2,3; Wu, Pute1,3,4; Zhao, Xining1,3,4; Gao, Ying3,4; Chen, Xiaoli3
2015-11-01
Source PublicationAGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
Volume161Pages:77-85
AbstractRelay strip intercropping of spring wheat and maize is practiced on a large scale in arid regions of northwestern China. In this study, a field experiment was carried out during 2012 and 2013 growing seasons to examine water use and crop coefficient of this system in an arid environment. The experiment comprised three treatments: sole-cropped wheat, sole-cropped maize, and wheat-maize intercropping. The grain yields of both intercropped wheat and maize were enhanced by intercropping. The gross economic profit for wheat-maize intercropping was 16.4% lower than that of sole maize and 95.4% higher than that of sole wheat. The overall land use efficiency was improved by intercropping. The time course of leaf area index in intercropping had the similar trends to those in sole crops with relatively low values, which never exceeded 3.0 m(2) m(-2) throughout both growing seasons. Compared to weighted means of the sole-cropping systems, wheat-maize intercropping used 26% and 24% more water in 2012 and 2013, respectively. The water-use efficiency of intercropping was nearly the same as the weighted means of the sole crops. Due to the incomplete groundcover in intercropping plots, more water was consumed as soil evaporation. Averaged over two seasons, the ratio of soil evaporation to actual evapotranspiration was 33.4, 20.7 and 24.1% for intercropping system, sole-cropped wheat and sole-cropped maize, respectively. Crop coefficient (KC) of sole-cropped wheat was 0.19 +/- 0.02, 1.05 +/- 0.07, and 0.42 +/- 0.09 at the initial, mid and late season in two seasons, respectively. K-c value of the sole-cropped maize was 0.22 +/- 0.03, 1.10 +/- 0.06 and 0.60 +/- 0.02 at the initial, mid and late season, respectively. The Kc values of the wheat-maize intercropping system varied in 0.21 +/- 0.03, 0.89 +/- 0.05, and 0.78 +/- 0.06 at the initial, middle and late wheat growing season, and in 0.85 +/- 0.03 and 0.61 +/- 0.01 at the middle and late maize growing season, respectively. Therefore, longer growing season and incomplete ground cover are the main factors that resulted in higher water use for wheat-maize intercropping compared to sole crops. Results of this study can help to improve the irrigation efficiency for the wheat-maize strip intercropping system. (C) 2015 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordEvapotranspiration Land Use Efficiency Soil Evaporation Strip Intercropping Water-use Efficiency Yield Advantage
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS Subject ExtendedAgriculture ; Water Resources
DOI10.1016/j.agwat.2015.07.012
WOS KeywordYELLOW-RIVER BASIN ; SOIL EVAPORATION ; USE EFFICIENCY ; WINTER-WHEAT ; YIELD ; EVAPOTRANSPIRATION ; RADIATION ; CAPTURE ; INTERCEPTION ; PRODUCTIVITY
Indexed BySCI
Language英语
WOS SubjectAgronomy ; Water Resources
WOS IDWOS:000361250700008
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/67872
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhao, Xining
Affiliation1.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China
2.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China
3.Northwest A&F Univ, Inst Water Saving Agr Arid Reg China, Yangling 712100, Shaanxi, Peoples R China
4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zikui,Wu, Pute,Zhao, Xining,et al. Water use and crop coefficient of the wheat-maize strip intercropping system for an arid region in northwestern China[J]. AGRICULTURAL WATER MANAGEMENT,2015,161:77-85.
APA Wang, Zikui,Wu, Pute,Zhao, Xining,Gao, Ying,&Chen, Xiaoli.(2015).Water use and crop coefficient of the wheat-maize strip intercropping system for an arid region in northwestern China.AGRICULTURAL WATER MANAGEMENT,161,77-85.
MLA Wang, Zikui,et al."Water use and crop coefficient of the wheat-maize strip intercropping system for an arid region in northwestern China".AGRICULTURAL WATER MANAGEMENT 161(2015):77-85.
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