土地开垦年限对研究土地退化的作用——以吉林省镇赉县为例

以吉林省镇赉县为例,从历史资料中获取了各个屯落的开垦年限进行分析。在ArcGIS环境下,对土地开垦年限进行插值,对比插值结果和镇赉县的DEM,并将土壤类型与插值结果进行zonal histogram分析,得出镇赉县各地的平均开垦年限,及每种土壤类型出现于每个开垦年限的可能性大小,从而分析出每种土壤类型被开垦的先后顺序是以开垦的难易程度决定的,并推出开垦顺序与土壤类型没有显著关系的结论。并根据每种土壤类型的开垦年限,得出栗钙土的土地退化程度可能较小,黑钙土、冲积土、草甸土、淡黑钙土、风沙土、碱土的土地退化程度都较大。

The Role of Land Reclamation Years to the Land Degradation

Taking Zhenlai County as the study case,and obtain reclamation years of each Tuen from the historical document and do some correlation analysis.Under the ArcGIS environment,we do the interpolation using the number of land reclamation years,and get the distribution map of the interpolation result by land reclamation years in Zhenlai.Then,we contrast the interpolation result and DEM map of Zhenlai.Later,we do zonal histogram analysis using the data of interpolation results and the soil type in Zhenlai,thus we know the average number of reclamation years of each Tuen of Zhenlai County and the statistical probability of every soil type in the each reclamation year.Thus,we obtain the conclusion that between terrain high or low and land reclamation sequence in Zhenlai,there is a clear relationship,the sequence is decided by the difficulty level of reclamation,at the same time,the reclamation sequence and soil types have no significant relationship.Based on the reclamation years of each soil type,land reclamation degree of chestnut soil is less,conversely,land reclamation degree of chernozem,atteration,meadow soil,light chernozem,aeolian sandy soil and solonetz are higher.