Assessment of the forest land use change and proposed land suitability for tea for the area along Laos – China Border were the main purpose of this research paper. An integrated GIS-based analysis system （IGAS）, su...Assessment of the forest land use change and proposed land suitability for tea for the area along Laos – China Border were the main purpose of this research paper. An integrated GIS-based analysis system （IGAS）, supporting assessment of forest land-use and land suitability for the study area where along Laos-China border was developed. Multi criteria analysis and system dynamics techniques were used to assess forest land use and land suitability and to forecast potential land-use for tea. The total study area is estimated at 10 325.07 km2 according to the field data collection and data analysis. The area of current forest cover decreased rapidly from 6337.33 km2 （61.38%） in 1992 to 5106.28 km2 （49.46%） in 2002 in the study area. The current forest was mainly trans-ferred to potential forest and permanent agriculture especially to rubber plantation areas even in the National Conservation Biodiversity Conser-vation Areas. The main causes of forest land use change are poverty. In order to address the problems, land suitability classification for tea was developed based on the multi-criteria. And finally two options of land suitability classification for tea for the study areas were developed.展开更多
【目的】掌握东北三省(黑龙江、吉林和辽宁)耕地时空变化特征、识别耕地产量的空间异质性,为提升其耕地质量和产能提供理论依据。【方法】采用Landsat数据及产品,测度分析东北三省耕地时空变化特征,并通过计算耕地像素累计归一化植被指...【目的】掌握东北三省(黑龙江、吉林和辽宁)耕地时空变化特征、识别耕地产量的空间异质性,为提升其耕地质量和产能提供理论依据。【方法】采用Landsat数据及产品,测度分析东北三省耕地时空变化特征,并通过计算耕地像素累计归一化植被指数(NDVI)结合省级粮食产量统计值核算像素产量,揭示耕地产量的空间异质性。【结果】①2000~2020年东北三省耕地面积增加了27×10^(4) hm^(2),粮食单产增加了2852 kg hm^(−2)。②黑河市、白城市、松原市、绥化市、齐齐哈尔市耕地面积增加最多,大庆市、齐齐哈尔市、绥化市、哈尔滨市和牡丹江市粮食单产均增长较快。③2000~2020年耕地重心从吉林省榆树市向黑龙江省哈尔滨市双城区迁移。粮食单产重心均位于黑龙江省哈尔滨市,迁移范围较小。【结论】2000~2020年东北三省耕地数量稳定,耕地重心向北移动,粮食单产重心向南移动。东北三省城市化、经济和人口重心持续南移促使辽宁高铁城市周边耕地减少。在耕地占补平衡政策下新增耕地集中于欠发达地区,耕地单产增加的冷点集中在耕作条件较差的山区。未来需完善耕地保护政策,防止耕地向山区扩张;加强农业补贴、基础设施建设和农耕管理,促进耕地可持续利用。展开更多
文摘Assessment of the forest land use change and proposed land suitability for tea for the area along Laos – China Border were the main purpose of this research paper. An integrated GIS-based analysis system （IGAS）, supporting assessment of forest land-use and land suitability for the study area where along Laos-China border was developed. Multi criteria analysis and system dynamics techniques were used to assess forest land use and land suitability and to forecast potential land-use for tea. The total study area is estimated at 10 325.07 km2 according to the field data collection and data analysis. The area of current forest cover decreased rapidly from 6337.33 km2 （61.38%） in 1992 to 5106.28 km2 （49.46%） in 2002 in the study area. The current forest was mainly trans-ferred to potential forest and permanent agriculture especially to rubber plantation areas even in the National Conservation Biodiversity Conser-vation Areas. The main causes of forest land use change are poverty. In order to address the problems, land suitability classification for tea was developed based on the multi-criteria. And finally two options of land suitability classification for tea for the study areas were developed.
文摘【目的】掌握东北三省(黑龙江、吉林和辽宁)耕地时空变化特征、识别耕地产量的空间异质性,为提升其耕地质量和产能提供理论依据。【方法】采用Landsat数据及产品,测度分析东北三省耕地时空变化特征,并通过计算耕地像素累计归一化植被指数(NDVI)结合省级粮食产量统计值核算像素产量,揭示耕地产量的空间异质性。【结果】①2000~2020年东北三省耕地面积增加了27×10^(4) hm^(2),粮食单产增加了2852 kg hm^(−2)。②黑河市、白城市、松原市、绥化市、齐齐哈尔市耕地面积增加最多,大庆市、齐齐哈尔市、绥化市、哈尔滨市和牡丹江市粮食单产均增长较快。③2000~2020年耕地重心从吉林省榆树市向黑龙江省哈尔滨市双城区迁移。粮食单产重心均位于黑龙江省哈尔滨市,迁移范围较小。【结论】2000~2020年东北三省耕地数量稳定,耕地重心向北移动,粮食单产重心向南移动。东北三省城市化、经济和人口重心持续南移促使辽宁高铁城市周边耕地减少。在耕地占补平衡政策下新增耕地集中于欠发达地区,耕地单产增加的冷点集中在耕作条件较差的山区。未来需完善耕地保护政策,防止耕地向山区扩张;加强农业补贴、基础设施建设和农耕管理,促进耕地可持续利用。
