中国岩溶2018，Vol.37Issue(6)：850-858,9.DOI:10.11932/karst2018y18
关岭-贞丰石漠化治理示范区植被覆盖变化及其对气候因子的响应
Change of vegetation coverage and its response to climatic factors in the Guanling-Zhenfeng demonstration area for reduction and control of rock desertification
摘要
Abstract
This paper studies the variation of vegetation coverage and the effect of climatic factors on the vegetation coverage in a demonstration area for reduction and control of karst rocky desertification. Based on the 30 m (16 d) resolution Landsat images during 2006-2015, using the method of maximum value composite (MVC), normalized difference vegetation index (NDVI), and correlation and partial correlation analyses, we systematically examine the spatial and temporal variation characteristics and the trend of vegetation index of the demonstration area and its relationship with climate factors. The results show that, (1) the annual maximum average value of NDVI between 2006 and 2015 is 0.39, which is higher in the north and south boundary regions of the demonstration area and lower in the south bank of the Huajiang river; (2) Since 2006, the places with extremely low (-1.210), low (-0.669) and moderate (-0.729) NDVI values exhibited a falling trend, those with high (1.359) and extremely high (1.247) increased overall significantly; (3) On the monthly scale, the NDVI of this month and the rainfall and temperature of this month, last month and month before the last one all pass the correlation coefficient test (P＜0.05), and the correlation between NDVI and rainfall this month is higher than that between NDVI and temperature (R (NDVI rainfall) =0.782), the correlation between NDVI of this month and temperature of last month is higher than that between NDVI of this month and rainfall of last month (R (NDVI temperature) =0.771). (4) The vegetation growth of the demonstration area has no lag phase to rainfall, but a month lag to air temperature.关键词
关岭-贞丰示范区/植被覆盖度/植被变化/气候变化/相关性Key words
Guangling-Zhenfeng demonstration area/vegetation coverage/vegetation variation/climate change/correlation分类
资源环境引用本文复制引用
曹洋,熊康宁,董晓超,肖华,全明英..关岭-贞丰石漠化治理示范区植被覆盖变化及其对气候因子的响应[J].中国岩溶,2018,37(6):850-858,9.基金项目
国家十三五重点研发计划课题"喀斯特高原石漠化综合治理生态产业模式与技术集成示范"(2016YFC0502607) （2016YFC0502607）
贵州省研究生教育创新计划项目"贵州省熊康宁喀斯特环境研究生导师工作室"(黔教研合GZS字[2016]04号) （黔教研合GZS字[2016]04号）
贵州省科技计划课题(黔科合社G字[2012]4008) （黔科合社G字[2012]4008）
