20002014年中国粮食主产区植被水分利用效率时空演变特征研究

	20002014年中国粮食主产区植被水分利用效率时空演变特征研究
其他题名	Spatiotemporal Variation ofWater Use Efficiency of Crops in Main Agricultural Production Regions of China from 2000 to 2014
	范田亿 1; 张翔 2
	2019
发表期刊	灌溉排水学报
ISSN	1672-3317
卷号	38 期号:3 页码:99-107
摘要	【Objective】Climate change will alert hydrological cycling. This paper analyzes the spatiotemporal change in crop production in main agricultural production areas in China in attempts to analyze the optimal reallocation of water resources for crop production and improve water use efficiency under globally changing climate. 【Method】The analysis was based on data from 20002014. Python and ArcGIS were used to calculate the spatiotemporal variation of water use efficiency (WUE) of the crops in the ecosystems within the major agricultural production areas (Northeast, Inner Mongolia, North, South); we also estimated the MOD17 (GPP) and MOD16 (ET) using the MODIS remote sensing data.【Result】①The annual WUE in major crop production areas from 2000 to 2014 in China was rising at an annual rate of 0.013 g(/ mm·m~2)(P<0.01), with two turning points occurring in 2003 and 2010 respectively. ②The intra-annual change in WUE was a M-type bimodal mode, with two peaks occurring in April to May and September to October, respectively. The seasonal WUE distribution differed significantly. ③The spatial distribution of WUE also varied seasonally. ④From 20002014, the overall WUE showed an increase, with areas seeing increase and significant increase (P<0.05) accounting for 84.01% and 39.91% of the total areas respectively. ⑤The WUE over the whole season was also in rise, although varying with location and time【. Conclusion】Under climate change, the WUE of the vegetation ecosystems in the main agricultural production areas from 2000 to 2014 in China had been rising with the intra-annual change being a M-type bimodal mode, and its distribution at seasonal and spatial scales varied considerably.
其他摘要	【目的】实现在气候变化背景下对粮食产区农业水资源的优化配置和水分的高效利用。【方法】利用Python、 ArcGIS软件和MODIS遥感估算的MOD17和MOD16数据产品,研究了中国粮食主产区(东北、内蒙古、华北、南部) 20002014年植被生态系统水分利用效率(water use efficiency,WUE)的时空分布规律。【结果】①年WUE(以碳计,下同)整体呈上升趋势,增速为0.013 g(/ mm·m~2 · a)(P<0.01),2个转折点分别出现在2003、2010年;②年内WUE的变化主要呈M型的双峰模式,峰值出现在45月、910月,而季节尺度上WUE的变化具有显著差异;③不同时间尺度的WUE空间分布上具有明显的异质性;④20002014年来全区年WUE整体呈上升趋势,其中呈上升趋势的面积占84.01%,但上升幅度以轻度、中度为主;⑤各季WUE整体呈上升趋势,但是不同季节WUE发生上升的区域位置、面积和显著性的大小都不同。【结论】在气候变化背景下,20002014年中国粮食主产区植被生态系统WUE呈上升趋势,且年内呈M型的双峰结构,季节和空间尺度上的分布具有显著差异。
关键词	遥感粮食主产区水分利用效率时空分布 remote sensing the main grain production regions water use efficiency spatiotemporal variation
收录类别	CSCD
语种	中文
WOS关键词	Agriculture
WOS研究方向	Science & Technology
WOS类目	AGRICULTURE MULTIDISCIPLINARY
CSCD记录号	CSCD:6464779
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
专题	任务一_子任务一循证社会科学证据集成任务一
作者单位	1.武汉大学;;武汉大学, 水资源与水电工程科学国家重点实验室;;水资源安全保障湖北省协同创新中心, 武汉;;武汉, ;; 430072;;430072 2.武汉大学;;武汉大学, 水资源与水电工程科学国家重点实验室;;水资源安全保障湖北省协同创新中心, 武汉;;武汉, ;; 430072;;430072
推荐引用方式 GB/T 7714	范田亿,张翔. 20002014年中国粮食主产区植被水分利用效率时空演变特征研究[J]. 灌溉排水学报,2019,38(3):99-107.
APA	范田亿,&张翔.(2019).20002014年中国粮食主产区植被水分利用效率时空演变特征研究.灌溉排水学报,38(3),99-107.
MLA	范田亿,et al."20002014年中国粮食主产区植被水分利用效率时空演变特征研究".灌溉排水学报 38.3(2019):99-107.