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[1]LI Danghui,XIE Min,QIAO Feng.Extraction of Vegetation Phenology Based on Remote Sensing Technique in Qingyang City, Gansu Province[J].Research of Soil and Water Conservation,2017,24(03):136-140.

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Extraction of Vegetation Phenology Based on Remote Sensing Technique in Qingyang City, Gansu Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 03 Page number: 136-140 Column: Public date: 2017-06-28

Title:: Extraction of Vegetation Phenology Based on Remote Sensing Technique in Qingyang City, Gansu Province

Author(s):: LI Danghui, XIE Min, QIAO Feng; Northwest Institute of Forest Inventory, Planning and Design, State Forest Administration, Xi’an 710048, China

Keywords:: SPOT-VGT NDVI; season of start; season of end; Qingyang City

CLC:: TP79

DOI:: -

Abstract:: SPOT-VGT NDVI images were employed to extract the seasonal data between 1999 and 2012 in Qingyang City which was the typical zone for the ‘Grain for Green Project’. Through selecting the Savitzky-Golay filter and extracting methods for start and end of season, we derived the spatiotemporal pattern of vegetation phenology. The results showed that the average start of season varied from 90th to 188th day, and it occurred earlier in southwest than northwest. The average end of the season varied from 275th to 309th day and it occurred later in the southern region; in the past fourteen years, there was a decreasing trend and induced the arising for start of the season. 55.46% of area varied with the rate of -1~1 day per year, presenting an advance in spatial. The region with a significant postponed trend was about 49.61% of the study area. These results were consistent with previous publications and showed a detail about the spatiotemporal pattern of vegetation phenology, which could provide reference for ecological environment evaluation and protection for ecotone of agriculture and grassland in north China.

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