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DOI	10.1088/1748-9326/abfe29
	Crop harvested area, not yield, drives variability in crop production in Iran
	Rezaei, Ehsan Eyshi; Ghazaryan, Gohar; Moradi, Rooholla; Dubovyk, Olena; Siebert, Stefan
通讯作者	Rezaei, EE (corresponding author), Univ Gottingen, Dept Crop Sci, D-37075 Gottingen, Germany. ; Rezaei, EE (corresponding author), Leibniz Ctr Agr Landscape Res ZALF, D-15374 Muncheberg, Germany.
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2021
卷号	16 期号:6
英文摘要	Increasing population and a severe water crisis are imposing growing pressure on Iranian cropping systems to increase crop production to meet the rising demand for food. Little is known about the separate contribution of trends and variability of the harvested area and yield to crop production in severely drought-prone areas such as Iran. In this study we (a) quantify the importance of harvested area and yield on trends and variability of crop production for the 12 most important annual crops under rainfed and irrigated conditions and (b) test how well the variability in annual crop areas can be explained by drought dynamics. We use remote sensing based land cover and evapotranspiration products derived from the Moderate Resolution Imaging Spectroradiometer to quantify the extent of cropland and drought severity as well as survey-based, crop-specific reports for the period 2001-2016 in Iran. The intensity of drought stress was estimated using the annual ratio between actual and potential evapotranspiration. We found that trends in the production of specific crops are predominantly explained by trends in harvested crop area. Besides, the variability in the harvested area contributed significantly more to the variability in crop production than the variability in crop yields, particularly under rainfed conditions (seven out of nine crops). In contrast, variability in the production of heavily subsidized crops such as wheat was predominantly explained by yield variability. Variability in the annual cropland area was largely explained by drought, in particular for the more arid regions in the south of the country. This highlights the importance of better and proactive drought management to stabilize crop areas and yields for sufficient food production in Iran.
英文关键词	climate drought harvested area crop yield remote sensing Iran
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000657924900001
WOS关键词	DROUGHT ; FOOD ; WEATHER ; MAIZE ; WHEAT
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350154
作者单位	[Rezaei, Ehsan Eyshi; Siebert, Stefan] Univ Gottingen, Dept Crop Sci, D-37075 Gottingen, Germany; [Ghazaryan, Gohar; Dubovyk, Olena] Univ Bonn, Ctr Remote Sensing Land Surfaces ZFL, D-53113 Bonn, Germany; [Moradi, Rooholla] Shahid Bahonar Univ Kerman, Dept Plant Product, Agr Fac Bardsir, Kerman, Iran; [Rezaei, Ehsan Eyshi; Ghazaryan, Gohar] Leibniz Ctr Agr Landscape Res ZALF, D-15374 Muncheberg, Germany
推荐引用方式 GB/T 7714	Rezaei, Ehsan Eyshi,Ghazaryan, Gohar,Moradi, Rooholla,et al. Crop harvested area, not yield, drives variability in crop production in Iran[J],2021,16(6).
APA	Rezaei, Ehsan Eyshi,Ghazaryan, Gohar,Moradi, Rooholla,Dubovyk, Olena,&Siebert, Stefan.(2021).Crop harvested area, not yield, drives variability in crop production in Iran.ENVIRONMENTAL RESEARCH LETTERS,16(6).
MLA	Rezaei, Ehsan Eyshi,et al."Crop harvested area, not yield, drives variability in crop production in Iran".ENVIRONMENTAL RESEARCH LETTERS 16.6(2021).