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	An investigation of reference evapotranspiration trends for crop water requirement estimation in Rajasthan
	Saxena, Rani; Tiwari, Atul; Mathur, Prasoon; Chakravarty, N. V. K.
通讯作者	Saxena, R (corresponding author), Rajasthan Agr Res Inst SKNAU, Jaipur, Rajasthan, India.
来源期刊	JOURNAL OF AGROMETEOROLOGY
ISSN	0972-1665
出版年	2020
卷号	22 期号:4 页码:449-456
英文摘要	Trends in reference evapotranspiration (ETo) estimated using Penman-Monteith equation were analysed over arid, semi-arid and humid regions of northwest (NW) India during 1985-2018. The Mann-Kendall is used to determine significance of trends. Theil-Sen's estimator and least square linear fitting methods are adopted to find slopes of the trend lines. The results indicated a significant decrease in ETo on annual basis for most of the locations and NW India as a whole. However, the trend was not statistically significant for seasonal ETo. The significant decrease in solar radiation and wind speed nullified the impact of increased temperature and resulted in slight decrease in ETo over arid and semi-arid regions of NW India which could probably be attributed to the increased dust hazy conditions prevailing. In NW India, water is a limiting resource the decrease in ETo may help researchers in decision makers to develop water assets and utilize the irrigation systems more effectively. There was also an increasing trend in production of major crops in the study region. Further, in near future, if this decreasing ETo trend were to remain, it would help in intensification of cropping system with the existing water resource.
英文关键词	Reference evapotranspiration Trends Penman-Monteith method Crop water requirement
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000603517700007
WOS关键词	POTENTIAL EVAPOTRANSPIRATION ; TEMPORAL CHARACTERISTICS ; PAN EVAPORATION
WOS类目	Agronomy ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348964
作者单位	[Saxena, Rani; Tiwari, Atul] Rajasthan Agr Res Inst SKNAU, Jaipur, Rajasthan, India; [Mathur, Prasoon] NCDEX, Reg Off, Jaipur, Rajasthan, India; [Chakravarty, N. V. K.] IARI, Agr Phys, New Delhi, India
推荐引用方式 GB/T 7714	Saxena, Rani,Tiwari, Atul,Mathur, Prasoon,et al. An investigation of reference evapotranspiration trends for crop water requirement estimation in Rajasthan[J],2020,22(4):449-456.
APA	Saxena, Rani,Tiwari, Atul,Mathur, Prasoon,&Chakravarty, N. V. K..(2020).An investigation of reference evapotranspiration trends for crop water requirement estimation in Rajasthan.JOURNAL OF AGROMETEOROLOGY,22(4),449-456.
MLA	Saxena, Rani,et al."An investigation of reference evapotranspiration trends for crop water requirement estimation in Rajasthan".JOURNAL OF AGROMETEOROLOGY 22.4(2020):449-456.