干旱区生态环境知识资源中心(Arid): Estimation of evapotranspiration and crop coefficient of drip-irrigated orange trees under a semi-arid climate

Arid

DOI	10.1016/j.agwat.2021.106769
	Estimation of evapotranspiration and crop coefficient of drip-irrigated orange trees under a semi-arid climate
	Jafari, Mohammad; Kamali, Hamidreza; Keshavarz, Ali; Momeni, Akbar
通讯作者	Kamali, H (corresponding author), Univ Hormozgan, Higher Educ Ctr, Minab, Hormozgan, Iran.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	248
英文摘要	A sustainable agricultural system requires increasing water use efficiency and enhancing knowledge of crop water use. This prerequisite is more pronounced in the regions with inadequate water resources and limited observational data such as southern Iran. Therefore, this study aimed at finding the water requirement of mature orange trees (Citrus sinensis (L.) Osbeck, cv. Tarocco Ippolito) by identifying standard evapotranspiration rate and crop coefficients (single and dual). Seventy-two orange trees in a drip-irrigated orchard with loam soil were classified into six treatments and irrigated at 100%, 90%, 80%, 70%, 60%, and 50% of reference evapotranspiration rate during 2017 and 2018. Soil moisture variability and crop physiological responses, including stem water potential (psi(stem)), net photosynthesis (A(n)), and stomatal conductance (g(s)) were measured. Our results showed that irrigating at 90% ETo provided the full water requirements of the trees. The mean crop evapotranspiration rate was calculated as 5.2 mm day(-1), with the crop coefficient ranging from 0.65 to 0.95. The average irrigation rate performed traditionally in the region was 19% higher than the actual requirement. Analysis of physiological response highlighted the controlling role of stomata in regulating transpiration and maintaining leaf turgor. During the peak water-stress, g(s) ranged from 0.11 to 0.12 molm(-2) s(-1) in fully irrigated trees, to 0.04-0.08 molm(-2) s(-1) in highly stressed trees. Our findings will provide a useful guideline for the local growers and agencies to achieve better irrigation scheduling and higher water productivity for the region.
英文关键词	Crop coefficients Evapotranspiration Stem water potential Stomatal conductance Water productivity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000632336300003
WOS关键词	WATER-USE EFFICIENCY ; REGULATED DEFICIT IRRIGATION ; SINENSIS L. OSBECK ; CITRUS ORCHARD ; SOIL ; EVAPORATION ; REGION ; CONDUCTANCE ; EXCHANGE ; BALANCE
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/2XILL650/368914
作者单位	[Jafari, Mohammad; Momeni, Akbar] Kazeroon Agr & Nat Resources Res & Educ Ctr, Fars, Iran; [Kamali, Hamidreza] Univ Hormozgan, Higher Educ Ctr, Minab, Hormozgan, Iran; [Keshavarz, Ali] Sari Univ, Water Engn Dept, Sch Agr Sci & Nat Resources, Mazandaran, Iran
推荐引用方式 GB/T 7714	Jafari, Mohammad,Kamali, Hamidreza,Keshavarz, Ali,et al. Estimation of evapotranspiration and crop coefficient of drip-irrigated orange trees under a semi-arid climate[J],2021,248.
APA	Jafari, Mohammad,Kamali, Hamidreza,Keshavarz, Ali,&Momeni, Akbar.(2021).Estimation of evapotranspiration and crop coefficient of drip-irrigated orange trees under a semi-arid climate.AGRICULTURAL WATER MANAGEMENT,248.
MLA	Jafari, Mohammad,et al."Estimation of evapotranspiration and crop coefficient of drip-irrigated orange trees under a semi-arid climate".AGRICULTURAL WATER MANAGEMENT 248(2021).