In order to find out the change of citrus orchard planting area, taking Xunwu County in Ganzhou city as the research object, based on three-phase of Landsat TM/OLI remote sensing images, this research adopts object oriented classification method to extract orchard information and combines the method of GIS spatial analysis to monitor and analyze the change of citrus orchard area in 2010-2016. Research results show that: ①Between 2010 and 2016, Xunwu County orange orchard area has undergone obvious changes. Farmland, forest and bare land mainly converted to orchard in 2010-2013, however, 2013-2016 was just the opposite. ②From 2009 to 2016, the orange orchard planting area first increased and then decreased. From 2010 to 2013, the orchard area increased by nearly 8.21 km2, from 2013 to 2016, the orchard area decreased by nearly 30.05 km2. ③Since 2013, a significant reduction in orange orchard area may be related to the outbreak of Citrus Huanglongbing. From 2013 to 2016, the largest change rate of orchard area was Jitan town of Xunwu county, the annual change rate of which was about 0.64 %. The results of this study are consistent with the statistics of the same period in Xunwu, which can provide a scientific basis for the yield prediction of medium and short term citrus production.%江西省赣州市是全国最大的柑橘生产地.为详细掌握赣南柑橘种植面积变化情况,以赣州寻乌县为例,采用Landsat TM/OLI三期遥感影像,运用面向对象的分类方法提取果园信息并结合GIS空间分析对2010—2016年间的果园面积变化进行遥感动态监测.研究结果表明:①2010年至2016年间,寻乌柑橘果园面积经历了明显的动态变化.2010—2013年农田、林区、裸地主要转变成果园,2013—2016年则刚好相反;②2010年至2016年柑橘果园种植面积呈先增加后减少的变化趋势,2010—2013年间果园面积增长了近8.21 km2,2013—2016年果园面积减少了近30.05 km2;③自2013年以来,柑橘果园面积大幅度减少可能与柑橘黄龙病有关,其中寻乌县吉潭镇2013—2016年果园面积变化率最大,年变化率约为0.64%.研究结果与寻乌同期统计年鉴中柑橘种植情况基本一致,能为中短期赣南柑橘产量预测提供科学依据.
展开▼
