基于GIS的河南省烤烟土壤肥力适宜性研究

烟草对其生长环境条件的变化敏感。烤烟生产有着严格的地域限制。本研究在分析河南省烤烟种植区各项肥力指标的基础上,建立了烤烟土壤肥力适宜性评价指标体系。运用模糊数学和层次分析法对土壤肥力水平进行了评价、分级。采用地理信息系统软件mapGIS绘制河南省烤烟种植区土壤肥力状况图。结果表明,河南省烤烟种植区以信阳、南阳等地为最适宜,而大部分地区肥力水平处于中等,占整个种植区的78%。对烤烟地力适宜性的主要障碍因子是氯离子含量和pH过高,而有机质过低。

Comprehensive Fertility Evaluation of Soil for Tobacco Plantation in Henan Province Based on GIS

The growth of tobacco is sensitive to environment conditions.The tobacco production is strictly restricted by regional cultivated land.Based on analysis of the physical and chemical properties of soil samples collected from Henan tobacco plantation area,the index system of soil fertility adaptability of tobacco was established.The fertility level was evaluated and classified by fuzzy and analysis.And the fertility map of Henan tobacco plantation area was drawn with GIS software mapGIS.It was found that the most suitable region is Xinyang and Nanyang.In most parts of this region,the soil fertility adaptability of tobacco was medium and the area accounted for 78%.The main obstacle factors were very high Cl-contents and pH value and lower organic matter content.