摘要
定量分析土地耕作适宜性、气候生产潜力与土地利用/土地覆盖变化(LUCC)的动态特征是科学规划土地利用、有效保护耕地资源的基础。本文基于湖南省气候、土地覆被、地形等数据,采用气候生产潜力估算和趋势分析方法,以300 m×300 m栅格为计算单元,获得湖南省2000—2017年耕地气候生产潜力的变化趋势,并分析湖南省土地耕作适宜性、气候生产潜力与LUCC过程的关系。结果显示:湖南省最适宜耕作的土地主要分布在北部平原、中部和南部盆地、丘陵区,气候生产潜力为19 530~40 375 kg/ha,整体呈现东南部高西北部低。北纬28°以南的中部、中东部丘陵盆地区,是土地耕作适宜性和气候生产潜力组合最好的区域。86.5%的新增人造地表为最适宜耕作的耕地,说明新增人造地表主要以牺牲优良的耕地为代价。气候变化、气候生产潜力变化与LUCC过程密切相关,LUCC过程中流向耕地多为气候生产潜力增加区,而耕地转为林地等土地类型则属于气候生产潜力下降区,指示气候变化在驱动不同类型土地相互转变中的作用。上述结果可望为湖南省土地规划整治及山地资源开发等提供决策参考。
Quantitative analysis on the dynamic features of land cultivation stability, climatic potential productivity and Land-use and Land-Cover Change (LUCC) is the foundation for scientific planning of land use and effective protection of cultivated land resources. Data including climate, land cover and Digital Elevation Model (DEM) with resolution pixel of 300m were used in this paper to acquire the change tvend of climatic potential productivity in 2000-2017 and relationships between land cultivation suitability, climatic potential productivity and LUCC process in Hunan province. The calculation results suggested that the climatic potential production was about 19 530-40 375 kg/ha , which was higher in southeast and lower in northwest. The optimum cultivated land was mainly distributed in the northern plain, basin and hilly region in central and the south area of Hunan province. The basin and hilly region in central and south area on the south of 28°N, were the region that owned the best combination of land cultivation suitability and climatic potential production. Additionally, 86.5% of the new artificial land surface were the most suitable cultivated land, which indicates that the artificial land surface mainly increased at the cost of cultivated land loss. Climate change and climatic potential production were closely correlated with LUCC progress, which faithfully indicated that climate change was a notable driver in mutual transformation of different types of land, as a result that climatic potential productivity decreased where cultivation land coverted to other land type such as forests, and it increased on the contrary. Above all, we expect that above-mentioned achievements could be a valuable reference for land planning and management and mountain resources development in Hunan province.
作者
王继人
钟昌标
王玲玲
莫宏伟
WANG Jiren;ZHONG Changbiao;WANG Lingling;MO Hongwei(School of Urban and Environment,Yunnan University of Finance and Economics,Kunming 650221,China;School of Resource Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《山地学报》
CSCD
北大核心
2019年第2期252-262,共11页
Mountain Research
基金
国家自然科学基金项目(71673182)
湖南省自然科学基金(2018JJ2115)~~
关键词
土地耕作适宜性
LUCC
气候生产潜力
湖南省
suitability of land cultivation
LUCC
climatic potential productivity
Hunan province
