摘要
为揭示移民迁建对三峡库区中部土壤养分的长期影响,本研究在库区中部不同地貌类型移民安置区选择3种(耕地、果园和林地)典型土地利用方式,通过主成分分析和内梅罗指数法,揭示1998~2015年各区域的土壤养分特征及年际变化规律。结果表明,库区中部移民安置区的土壤养分总体水平较低;不同地貌类型区及土地利用方式土壤养分特征及变化存在差异性,整体呈现降低-增加-降低的趋势;2008年、2012年是土壤养分综合指数的最低和最高点,条状低山区土壤养分指数最高,浅丘区次之,单斜深丘区最低,但变化幅度较大;耕地土壤养分指数变化较显著,而林地、果园较为稳定。
In order to reveal the long-term influence of immigrant construction on soil nutrients, the changes in soil nutrient characteristics and soil quality were studied through principal component analysis and Nemerow index in different landform resettlement regions in the middle part of Three Gorges Reservoir from 1998 to 2015. There were three typical land use patterns of forest land, orchard and cultivated land. The results showed that soil nutrients in resettlement region were relatively low. There were differences in soil nutrient characteristics and its variation between landform areas and land use types. They showed the decrease - increase - decrease trends in the whole. Compared with before impoundment, soil nutrient index increased in resettlement region in the middle part of Three Gorges Reservoir in 2015. The minimum of soil nutrient index was showed in 2008 and the maximum in 2012. Soil nutrients integrated index was the highest hills. The change of soil nutrient at the low mountainous area, followed at the hilly area and then at the monoclinic index in cultivated land was significant, but that in forest land and orchard changed slightly.
出处
《土壤通报》
CAS
北大核心
2017年第3期656-661,共6页
Chinese Journal of Soil Science
基金
国家自然科学基金面上项目(41371539)资助
关键词
三峡库区
移民安置
土地利用
土壤养分
There Gorges Reservoir area
Resettlement
Land use pattern
Soil nutrient
