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Fuzzy Synthetic Evaluation of Soil Quality in Coastal Reclamation Region of North Jiangsu Province
Authors
余世鹏
姚荣江
+3 more
李晓明
杨劲松
陈小兵
Publication date
31 December 2008
Publisher
Abstract
[目的]系统掌握苏北海涂围垦区的土壤质量现状及其空间分布特征,获取实现土壤培肥抑盐与质量提升的调控措施.[方法]采用模糊综合评价与GIS相结合的方法,对土壤质量进行模糊综合评价与分级,获取区域土壤质量综合评价分级图.[结果]研究区土壤质量状况总体较低,土壤有机质和氮素亏缺较为严重,尤其是碱解氮;除容重为弱变异强度外,其余各评价指标均呈中等变异强度;有机质是重要的土壤质量评价因子,土壤盐分和地下水矿化度是土壤质量的主要限制因子.研究区不同部位土壤质量状况具有明显差异性,其空间分布规律与有机质较为相似,与土壤盐分相反,总体上棉花种植区的土壤质量状况要优于水稻种植区;研究区土壤质量中等的区域面积最大,其次是低质量区,高质量区面积最小.[结论]土壤质量分级囹可用于研究区中低产地改造、盐碱地综合治理和合理施肥,土壤质量较低区域应完善田间排灌设施,质量中等区域宜加强农业生物改良
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Last time updated on 18/09/2018