干旱区生态环境知识资源中心(Arid): Optimizing irrigation and nitrogen requirements for maize through empirical modeling in semi-arid environment

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DOI	10.1007/s11356-018-2772-x
	Optimizing irrigation and nitrogen requirements for maize through empirical modeling in semi-arid environment
	Ahmad, Ishfaq 1; Wajid, Syed Aftab 1; Ahmad, Ashfaq 1; Cheema, Muhammad Jehanzeb Masud 2; Judge, Jasmeet 3
通讯作者	Ahmad, Ishfaq
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
EISSN	1614-7499
出版年	2019
卷号	26 期号:2 页码:1227-1237
英文摘要	Uncertainty in future availability of irrigation water and regulation of nutrient amount, management strategies for irrigation and nitrogen (N) are essential to maximize the crop productivity. To study the response of irrigation and N on water productivity and economic return of maize (Zea mays L.) grain yield, an experiment was conducted at Water Management Research Center, University of Agriculture Faisalabad, Pakistan in 2015 and 2016. Treatments included of full and three reduced levels of irrigation, with four rates of N fertilization. An empirical model was developed using observed grain yield for irrigation and N levels. Results from model and economic analysis showed that the N rates of 235, 229, 233, and 210kgha(-1) were the most economical optimum N rates to achieve the economic yield of 9321, 8937, 5748, and 3493kgha(-1) at 100%, 80%, 60%, and 40% irrigation levels, respectively. Economic optimum N rates were further explored to find out the optimum level of irrigation as a function of the total water applied using a quadratic equation. The results showed that 520mm is the optimum level of irrigation for the entire growing season in 2015 and 2016. Results also revealed that yield is not significantly affected by reducing the irrigation from full irrigation to 80% of full irrigation. It is concluded from the study that the relationship between irrigation and N can be used for efficient management of irrigation and N and to reduce the losses of N to avoid the economic loss and environmental hazards. The empirical equation can help farmers to optimize irrigation and N to obtain maximum economic return in semi-arid regions with sandy loam soils.
英文关键词	Water scarcity Irrigation amount N losses Water productivity
类型	Article
语种	英语
国家	Pakistan ; USA
收录类别	SCI-E
WOS记录号	WOS:000455814700022
WOS关键词	DEFICIT IRRIGATION ; USE EFFICIENCY ; YIELD COMPONENTS ; WATER SCARCITY ; SOIL ; PRODUCTIVITY ; NUTRITION ; QUALITY ; TRAITS ; IMPACT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215534
作者单位	1.Univ Agr Faisalabad, Agroclimatol Lab, Dept Agron, Faisalabad, Pakistan; 2.Univ Agr Faisalabad, Dept Irrigat & Drainage, Faisalabad, Pakistan; 3.Univ Florida, Ctr Remote Sensing, Agr & Biol Engn Dept, Gainesville, FL USA
推荐引用方式 GB/T 7714	Ahmad, Ishfaq,Wajid, Syed Aftab,Ahmad, Ashfaq,et al. Optimizing irrigation and nitrogen requirements for maize through empirical modeling in semi-arid environment[J],2019,26(2):1227-1237.
APA	Ahmad, Ishfaq,Wajid, Syed Aftab,Ahmad, Ashfaq,Cheema, Muhammad Jehanzeb Masud,&Judge, Jasmeet.(2019).Optimizing irrigation and nitrogen requirements for maize through empirical modeling in semi-arid environment.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,26(2),1227-1237.
MLA	Ahmad, Ishfaq,et al."Optimizing irrigation and nitrogen requirements for maize through empirical modeling in semi-arid environment".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 26.2(2019):1227-1237.