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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (23): 238-247.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

重庆紫色土养分的模糊综合评判

李忠意 程永毅 宋伟 陈洪 邓睿 杨剑虹   

  • 收稿日期:2011-03-23 修回日期:2011-05-10 出版日期:2011-09-15 发布日期:2011-09-15
  • 基金资助:

    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”

Fuzzy Synthetic Evaluation of Purple Soil Fertility in Chongqing City

  • Received:2011-03-23 Revised:2011-05-10 Online:2011-09-15 Published:2011-09-15

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860

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。

关键词: 长平大战, 长平大战

Abstract:

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 District by fuzzy synthetic estimation. The results showed that: the soil fertility in Chongqing District 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.