重庆紫色土养分的模糊综合评判  

Fuzzy Synthetic Evaluation of Purple Soil Fertility in Chongqing City

作　　者：李忠意[1] 程永毅[1] 宋伟[1] 陈洪[1] 邓睿[1] 杨剑虹[1] 

机构地区：[1]西南大学资源环境学院,重庆400716

出　　处：《中国农学通报》2011年第23期238-247,共10页Chinese Agricultural Science Bulletin

基　　金：国家支撑计划项目"高效施肥关键技术研究与示范--土壤养分高效测试关键技术研究课题"(2008BADA4B01)

摘　　要：采用模糊(Fuzzy)综合评判法对重庆市中生代侏罗纪时期发育的4种紫色土进行土壤的养分等级评价。结果表明:重庆主要类型紫色土土壤整体养分等级为中等水平,其中属于中等偏上的占22.6%、中等水平占58.5%、中等偏下水平的占18.9%。土壤有机质、全N、有效N、有效Mn含量较低;全P、有效P、速效K、有效Zn、CEC含量适宜;全K、缓效K、有效Cu含量丰富;有效B严重缺乏。影响土壤肥力的主要因素是有效N、有机质、全N、有效P、速效K,且各主要养分元素对土壤肥力的贡献率为有效N>有机质>全N>有效P>速效K。The present experiment was conducted to study soil nutrient status of four kinds of purple soil that developed in Jurassic period Mesozoic era in Chongqing City by fuzzy synthetic estimation.The results showed that：the soil fertility in Chongqing City was at secondary level,among which 22.6% was better,58.5% was middling and 18.9% was worse.The content of organic matter,total nitrogen,available nitrogen and available manganese are low.Total phosphor,available phosphor,available potassium,available zinc and cation exchange capacity were at intermediate level.Total potassium,slowly release potassium,available cuprum were at rich level.And it was severely short of available boron.The main factors that decide the soil fertility were available nitrogen,organic matter,total nitrogen,available phosphor and available potassium.And the contribution rate of main factors were available nitrogen organic matter total nitrogen available phosphor available potassium.

关 键 词：重庆市 紫色土 土壤养分 综合评价 

分 类 号：S158.2[农业科学—土壤学]