耕地土壤外部环境影响因子初探——以闽侯县为例

Analysis of Environment Factors of Cultivated Soils --Taking Minhou County as an Example

耕地土壤性质与气候、地形、母质等自然环境和人类活动存在错综复杂的内在联系 .选取闽侯县367个代表性样区耕地土壤样品的分析数据 ,以有机质等 2 0个指标做为分析因子 ,试用主成分分析与灰色关联度分析两种方法相结合进行分析 ,揭示土壤性质与外部环境因子的关系 .结果表明 :目前该县社会经济因子对土壤属性的影响小于自然环境因子的影响 ;水土流失对耕地土壤的影响尚不十分突出 ,但仍是影响耕地资源可持续利用的隐患 ;加大中低产田改造力度 ,对区域农业可持续发展具有积极意义 .

There are complicated inherent connections between the soil properties of cultivated land and human activities as well as natural environmental factors such as climate, topography, parent material and so on. In this project, analytical data of 20 items from 367 of cultivated soil samples in Minhou county were selected, and principle component and gray relation analysis methods were used for revealing the relationship between soil properties and environmental factors. The results suggested:presently, the impacts of social-economic factors on soil properties is less than that of natural environment factors in the county; the soil and water loss in the research region is not grievous, but could be a hidden dangerous factor to the sustainable use of land resources; to intensify improving the middle and low productive soils could be of significance to the sustainable development of regional agriculture.