干旱区生态环境知识资源中心(Arid): Effects of irrigation uniformity on yield response and production economics of maize in a semiarid zone

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DOI	10.1016/j.agwat.2018.09.051
	Effects of irrigation uniformity on yield response and production economics of maize in a semiarid zone
	Nascimento, A. K.1; Schwartz, R. C.2; Lima, F. A.1; Lopez-Mata, E.1; Dominguez, A.1; Izquiel, A.1; Tarjuelo, J. M.1; Martinez-Romero, A.1
通讯作者	Dominguez, A.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2019
卷号	211 页码:178-189
英文摘要	Optimized irrigation scheduling to better match applied water to crop requirements can reduce the consumptive use of water and energy, improve water use efficiency, and increase gross profit margin. However, the distribution uniformity of applied irrigation can modify the way reduced water applications influence field-averaged performance, especially for crops sensitive to water stress as maize, in which the most sensitive stages are those related with reproduction and grain formation. We evaluated the effect of irrigation uniformity on the yield and profitability of maize (Zea Mays L.) in Albacete, Spain in two adjacent sectors equipped with a solid set sprinkler irrigation system of a field managed according to FAO-56 methodology throughout the growing season to maximize grain yield without water stress (Sector S1) or irrigation scheduling determined by an experienced producer (Sector S2). Irrigation uniformity was evaluated using catch cans in both fields and grain yield was harvested within zones exhibiting 75% (Z1), 100% (Z2), and 125% (Z3) of area-averaged volume applications throughout the year. The average coefficient of uniformity (CU) in both sectors (S1 and S2) was 83.5%, and the net amount of applied irrigation water totaled 709 mm in 51 and 832 mm in S2. Average grain yield in sector S2 approached the maximum expected yield of 18A Mg ha(-1) and exhibited no significant differences in yield among zones. In contrast, sector S1 exhibited significant yield differences (p < 0.05) among zones with a measured yield in Z3 of 18.5 Mg ha(-1) and a yield reduction of 1.6 Mg ha(-1) and 4.0 Mg ha(-1) in Z2 and Z1, respectively. Consequently, the area-averaged yield in S1 was 8% less than in S2. This last treatment was positively influenced by a higher amount of irrigation water supplied to the crop (17%), which decreased the effect of low CU (83.5%). The grain yields simulated by MOPECO for each monitoring zone within the sectors exhibited similar magnitude and trends. Because of these yield differences and the relatively low cost of irrigation water, area averaged gross margin in S1 was 18% less compared with S2. Simulations with MOPECO over a range of CU's demonstrated that improved irrigation uniformity increased area-averaged yields and gross margin when following 51 instead of S2 strategy. The main innovations of this work were to quantify the effect of irrigation uniformity on the gross margin of a maize crop, and to highlight that in arid and semiarid areas with water scarce conditions, it is a better strategy to improve the irrigation uniformity than supply a higher amount of irrigation water to mask the lack of uniformity.
英文关键词	Irrigation scheduling Solid set sprinkler irrigation system Crop modeling MOPECO Energy saving Water saving
类型	Article
语种	英语
国家	Spain ; USA
收录类别	SCI-E
WOS记录号	WOS:000449139500019
WOS关键词	REGULATED DEFICIT IRRIGATION ; DRIFT LOSSES ; WATER ; PROFITABILITY ; EVAPORATION ; SIMULATION ; SPRINKLERS ; SYSTEM ; MODEL
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/2XILL650/213969
作者单位	1.UCLM, Reg Ctr Water Res CREA, Campus univ S-N, Albacete 02071, Spain; 2.USDA ARS, Conservat & Prod Res Lab, PO Drawer 10, Bushland, TX 79012 USA
推荐引用方式 GB/T 7714	Nascimento, A. K.,Schwartz, R. C.,Lima, F. A.,et al. Effects of irrigation uniformity on yield response and production economics of maize in a semiarid zone[J],2019,211:178-189.
APA	Nascimento, A. K..,Schwartz, R. C..,Lima, F. A..,Lopez-Mata, E..,Dominguez, A..,...&Martinez-Romero, A..(2019).Effects of irrigation uniformity on yield response and production economics of maize in a semiarid zone.AGRICULTURAL WATER MANAGEMENT,211,178-189.
MLA	Nascimento, A. K.,et al."Effects of irrigation uniformity on yield response and production economics of maize in a semiarid zone".AGRICULTURAL WATER MANAGEMENT 211(2019):178-189.