干旱区地理2011，Vol.34Issue(2)：325-330,6.
基于GIS的典型黑土区海伦市耕地地力评价研究
Assessment of cropland productivity based on GIS for typical blacksoil region at Hailun County
摘要
Abstract
The assessment ofcropland productivity was conducted based on GIS, combined with fuzzy mathematics and soil sciences in Hailun County in black soil region, northeast China. In the study, the 577 soil samples with 0 - 20 cm layer were collected from the field in all the Hailun County, and the geostatistics and Kriging method were used in the study in order to analysis the spatial heterogeneity of soil nutrients and built a soil nutrients map. Other maps such as the soil map, land-use map and regional map with village boundary also were collected and treated using ArcGIS. The database was established by the collecting data, and prepared for the analysis. Then the assessment unit was created by overlay the maps of landuse actuality map, soil map and regional map. The 12 essential factors, which were decided from the aspects of the soil nutrients, soil physic-chemistry character, site condition and land management, including Som ( soil organic matter); Ap ( available phosphors); Ak ( available potassium );soil texture; pH; ≥ 10 ℃ accumulated temperature; landforms; gradient; slope aspect; plough layer thickness;type of soil obstacle and position of soil obstacle were selected as evaluation indices by using Delphi model. Linking with the AHP(Analytical Hierarchy Progress), and with GIS fiatform, the cropland productivity was evaluated. Finally the evaluation results were obtained by counting and analyzing the assessment outcomes: The results indicat that the area of 1at ,2nd ,3rd grade cultivated land are 98 839 hm2, 159 817.9 hm2 ,49 093.4 hm2, which constitute the rates of 32.1％ ,52.9％ ,16.1％ of the total area of the cultivated land respectively. The research has achieved quantitative evaluation on cropland productivity level in Hailun County, 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.关键词
耕地地力/黑土区/海伦市/GISKey words
cropland productivity/ blacksoil region/ Hailun County/ GIS分类
农业科技引用本文复制引用
谢叶伟,赵军,李勇,阎凤学,张久明..基于GIS的典型黑土区海伦市耕地地力评价研究[J].干旱区地理,2011,34(2):325-330,6.基金项目
黑龙江省自然科学基金重点项目:ZD200813-01,国家科技支撑项目:2009BADB3BD4 （）
