摘要
采用GPS定位技术,在马龙县进行大规模的植烟土壤取样,对区域内植烟土壤养分状况的总体特征、空间变异特征进行了研究,并基于地统计学方法和模糊数学原理对植烟土壤养分适宜性进行综合评价。结果表明:马龙县植烟土壤pH、有机质、有效S和水溶性Cl含量适宜,全N和碱解N含量偏高,速效P、速效K、有效Ca、有效Mg、有效Cu、有效Fe、有效Mo和有效Mn含量丰富,有效Zn含量中等,全P、全K和有效B含量偏低;区域内植烟土壤养分指标均表现为各向异性分布,其中有效Ca、pH、水溶性Cl、有效B和速效K等5项养分的空间变异主要受随机因子影响,其他养分指标的空间变异同时受结构性因素和随机性因素影响;马龙县植烟土壤适宜性空间分布图表明,土壤养分适宜性指数为优的区域占研究区域总面积的0.19%,为良的区域占19.63%,为一般的区域占59.17%,为中等的区域占21.01%,为差的区域占0%。
Based on GPS technology, 144 tobacco soil samples were collected in Malong County. Descriptive analysis characteristics and spatial variation characteristics were studied. Soil feasibility index were evaluated based on geo-statistics and fuzzy mathematical theory. The results indicated that pH, organic content, available S and water-soluble Cl were suitable, total N and available N were too high, available P, available K, available Ca, available Mg, available Cu, available Fe, available Mo and available Mn were abundant, available Zn was middle, total P, total K and available B were insufficient; Anisotropic structure of nutrient indices varied evidently, spatial variability of available Ca, pH, available B and available K were mainly caused by random factors while other nutrient indices’ spatial variability caused by structural factors and random factors; Spatial distribution map of SFI showed that the areas of good, general and moderate grades were 19.63%, 59.17% and 21.01% respectively.
出处
《土壤》
CAS
CSCD
北大核心
2011年第6期897-902,共6页
Soils
基金
国家烟草专卖局重大专项(110200902035
110200801036)
湖南省研究生创新项目(CX2010B309)资助
关键词
植烟土壤
养分
地统计学
空间变异
适宜性
Tobacco soil Nutrient Geo-statistics Spatial variability Feasibility
