基于GIS的典型白浆土区八五三农场耕地地力的定量评价

以黑龙江省典型白浆土区的853农场为例,采集农田耕层(0～20cm)样品1695个,以土地利用现状图的耕地图斑为评价单元,选取10个指标,利用特尔菲法和层次分析法,结合GIS技术,对853农场耕地地力进行了定量化的分析和评价.评价结果表明八五三农场耕地地力整体水平为:三级地占总耕地面积的35.47％,其次为二级和四级,分别占27.53％和20.86％,比例最小的是一级和五级地,分别占6.83％和9.30％.分级结果较好的体现了地区特点,同时明确了不同等级耕地的面积、空间分布格局,为探讨制定科学的培肥政策、提高作物产量和土壤基础地力,保护生态环境提供了定量化的分析依据.

Quantitative evaluation of cultivated land productivity based on GIS for typical Albic bleached soil region in the 853 farm

The quantitative analysis and evaluation was conducted based on GIS,combined with Delphi model and AHP(Analytical Hierarchy Progress) for typical Albic bleached soil region in the 853 farm in Heilongjiang Province.In the study,1295 soil samples with 0~20cm layer were collected from the field,evaluation unit was extracted from land use actuality map,and ten essential factors were selected as evaluation indices.The results showed that the percentage of the third grade reached maximum,was 35.47%,then the second and fourth grade which were 27.53% and 20.86%,the minimum were the first and fifth with 6.83% and 9.30%,respectively.The research results could reflect regional characteristic,and has verified the area of cultivated land of different level and the space distributing pattern.So this research can provide scientific and quantification foundation for making scientific fertilizer policy,improving crop production and the soil fundamental fertility,and protecting ecological environment.