干旱区生态环境知识资源中心(Arid): Evaluating deficit irrigation scheduling strategies to improve yield and water productivity of maize in arid environment using simulation

Arid

DOI	10.1016/j.agwat.2021.106812
	Evaluating deficit irrigation scheduling strategies to improve yield and water productivity of maize in arid environment using simulation
	Attia, Ahmed; El-Hendawy, Salah; Al-Suhaibani, Nasser; Alotaibi, Majed; Tahir, Muhammad Usman; Kamal, Khaled Y.
通讯作者	El-Hendawy, S (corresponding author), King Saud Univ, Dept Plant Prod, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	249
英文摘要	Water scarcity and rising temperatures are creating serious concerns over the sustainability of agriculture systems in arid regions of the Middle East and North Africa. The aims were (i) to calibrate and evaluate the Decision Support System for Agrotechnology Transfer (DSSAT) model using detailed experimental datasets on maize (Zea mays L.) yield and water productivity in an arid Mediterranean environment and (ii) to determine the impacts of various irrigation scheduling strategies on maize yield and water productivity in arid sandy soils and produce irrigation scheduling recommendations that maximize the marginal benefit per unit water applied. The goodness-of-fit statistics comparing the observed and simulated crop phenology, grain yield, dry matter, evapotranspiration (ET), and soil water content indicate that the model simulates these crop and soil variables reasonably well for a medium-maturity maize hybrid (similar to 110 days to physiological maturity) commonly grown in the study region. Long-term simulations (1984-2018) using the well-calibrated model were performed and included three irrigation scheduling strategies: (i) soil water-based irrigation scheduling, (ii) ET-based threshold irrigation scheduling, and (iii) growth-stage ET-based irrigation scheduling. In the soil water-based, four levels of maximum allowable depletion (MAD) of available soil water content (AWC) were tested using the auto-irrigation option of DSSAT. Results indicated that MAD 50% is recommended for scheduling irrigation in arid sandy soils for potential irrigation water saving without unacceptable yield loss. The ET-based threshold consisted of a combination of four cumulative net ET threshold (ETH) triggers of 14, 21, 28, and 35 mm and five ET replacement levels of 50%, 70%, 90%, 110%, and 130% ET using the DSSAT ET-based auto-irrigation option. Based on this irrigation strategy, it is more favorable to irrigate at the high frequency of ETH 14 or 21 mm than low frequency of ETH 35 mm, even when replacing 130% ET, as high drought-stress during the crop development and reproductive stages were observed for ETH 35 mm due to the omission of key irrigation events. In the growth-stage ET-based, two levels of irrigation of 100% ET and 60% ET estimated based on the crop coefficient approach were tested with different combinations of targets during the vegetative and reproductive growth stages. Results indicated that meeting crop ET requirements during the reproductive stage is more essential than during the vegetative stage for greater yield and enhanced WUE, particularly when available seasonal irrigation water is less than seasonal full crop ET requirements. In water limited environments, reasonable yield and enhanced WUE can be achieved by applying a deficit rate of 40% ET during the vegetative stage and 80% ET during the reproductive stage or scheduling irrigation based on soil water content to ensure AWC of 30% in the top 0-30 cm soil layer throughout the growing season. Concepts developed in the present study can be adapted to effectively manage irrigation scheduling for medium-maturity maize hybrids in arid sandy soils with low AWC and organic C content.
英文关键词	Irrigation scheduling Arid Mediterranean climate DSSAT-CERES-Maize Sandy soil Water use efficiency Drought-stress
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000629261400001
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	King Saud University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349335
作者单位	[Attia, Ahmed; Kamal, Khaled Y.] Zagazig Univ, Dept Agron, Zagazig 44519, Sharqia, Egypt; [El-Hendawy, Salah; Al-Suhaibani, Nasser; Alotaibi, Majed; Tahir, Muhammad Usman] King Saud Univ, Dept Plant Prod, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia; [El-Hendawy, Salah] Suez Canal Univ, Dept Agron, Fac Agr, Ismailia 41522, Egypt
推荐引用方式 GB/T 7714	Attia, Ahmed,El-Hendawy, Salah,Al-Suhaibani, Nasser,et al. Evaluating deficit irrigation scheduling strategies to improve yield and water productivity of maize in arid environment using simulation[J]. King Saud University,2021,249.
APA	Attia, Ahmed,El-Hendawy, Salah,Al-Suhaibani, Nasser,Alotaibi, Majed,Tahir, Muhammad Usman,&Kamal, Khaled Y..(2021).Evaluating deficit irrigation scheduling strategies to improve yield and water productivity of maize in arid environment using simulation.AGRICULTURAL WATER MANAGEMENT,249.
MLA	Attia, Ahmed,et al."Evaluating deficit irrigation scheduling strategies to improve yield and water productivity of maize in arid environment using simulation".AGRICULTURAL WATER MANAGEMENT 249(2021).