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Drip irrigation lateral spacing and mulching affects the wetting pattern, shoot-root regulation, and yield of maize in a sand-layered soil
Zhou, Lifeng1,3; Feng, Hao2; Zhao, Ying4; Qi, Zhijuan2; Zhang, Tibin2; He, Jianqiang1; Dyck, Miles5
2017-04-01
Source PublicationAGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
Volume184Pages:114-123
Corresponding AuthorFeng, Hao(nercwsi@vip.sina.com) ; Zhao, Ying(yzhaosoils@gmail.com)
AbstractSoil with a 20-60 cm thick subsoil (60-90 cm below the surface) sand layer has been recently reclaimed to exploit its grain production potential in an arid region in northwest China. A 2-year field study was conducted in the Hetao irrigation district to investigate the effects of lateral spacing and soil mulching methods under drip irrigation on the soil moisture, NO3-, shoot-root regulation, and water use efficiency (WUE) of spring maize. The Christiansen uniformity coefficient (C-us) was adopted to evaluate soil moisture and NO3- distribution, which was calculated with soil water content and NO3- concentration. The four studied treatments consisted of two irrigation lateral-spacings (Al: 1.0 m, A2: 0.5 m) and two film-covering modes (Ml: fully mulched, M2: partially mulched) were arranged. Soil moisture was most affected by mulch coverage (full or half surface coverage) under low frequency irrigation lateral spacing (adjacent to or between crop rows) under high frequency irrigation. Lateral spacing exerted a notable influence on soil moisture at a 20 cm depth, while the mulching method influenced soil moisture mainly at 40 cm. Irrigation frequency and close lateral spacing can effectively enhance C-us. Based on our observations, a decrease in the C-us of soil NO3- may occur under frequent fertigation, particularly when irrigation laterals are between crop rows. The mulching method can play an important role in improving the concentration and C-us of soil NO3-, while the A2 treatments can slow the decrease of the C-us of soil NO3- under frequent fertigation. Root length density (RLD) under Al treatments were lower close to lateral while higher away from lateral than A2 treatments. Close lateral spacing can result in high hundred gain weight (HGW) and high harvest index (HI) while exerting a more conspicuous effect than the mulching method by extending the grain filling stage. Frequent fertigation (i.e. once every three days) after jointing is preferentially recommended in a sand layered field. Al M2 should be chosen for higher HI and low cost. If frequent fertigation is infeasible, A2M1 can be a good choice under low frequency fertigation. (C) 2017 Published by Elsevier B.V.
KeywordMulched drip irrigation Lateral spacing Wetting pattern Shoot-root regulation Sand-layered soil
DOI10.1016/j.agwat.2017.01.008
WOS KeywordWATER-USE EFFICIENCY ; LEAF SENESCENCE ; POINT-SOURCE ; NITROGEN ; GROWTH ; CORN ; NITRATE ; TOMATO ; WHEAT ; VARIABILITY
Indexed BySCI
Language英语
Funding ProjectNational High Technology Research and Development Program of China[2013AA102904] ; National Natural Science Foundation of China[41371234] ; 111 Project of the Ministry of Education and the State Administration of Foreign Experts Affairs[B12007]
Funding OrganizationNational High Technology Research and Development Program of China ; National Natural Science Foundation of China ; 111 Project of the Ministry of Education and the State Administration of Foreign Experts Affairs
WOS Research AreaAgriculture ; Water Resources
WOS SubjectAgronomy ; Water Resources
WOS IDWOS:000397351400013
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/64676
Collection中国科学院地理科学与资源研究所
Corresponding AuthorFeng, Hao; Zhao, Ying
Affiliation1.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi Provinc, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi Provinc, Peoples R China
3.Shaanxi Sci Tech Univ, Sch Biol Sci & Engn, Hanzhong 723003, Shaanxi Provinc, Peoples R China
4.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi Provinc, Peoples R China
5.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada
Recommended Citation
GB/T 7714
Zhou, Lifeng,Feng, Hao,Zhao, Ying,et al. Drip irrigation lateral spacing and mulching affects the wetting pattern, shoot-root regulation, and yield of maize in a sand-layered soil[J]. AGRICULTURAL WATER MANAGEMENT,2017,184:114-123.
APA Zhou, Lifeng.,Feng, Hao.,Zhao, Ying.,Qi, Zhijuan.,Zhang, Tibin.,...&Dyck, Miles.(2017).Drip irrigation lateral spacing and mulching affects the wetting pattern, shoot-root regulation, and yield of maize in a sand-layered soil.AGRICULTURAL WATER MANAGEMENT,184,114-123.
MLA Zhou, Lifeng,et al."Drip irrigation lateral spacing and mulching affects the wetting pattern, shoot-root regulation, and yield of maize in a sand-layered soil".AGRICULTURAL WATER MANAGEMENT 184(2017):114-123.
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