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应用生态学报 ›› 2005, Vol. 16 ›› Issue (5): 875-878.

• 研究论文 • 上一篇    下一篇

长期施肥条件下潮土不同组分有机质的动态研究

尹云锋, 蔡祖聪, 钦绳武   

  1. 中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 南京 210008
  • 收稿日期:2004-04-19 修回日期:2004-06-28 出版日期:2005-05-15 发布日期:2005-05-15
  • 通讯作者: 尹云锋,男,1975年1月生,博士生,主要从事农田土壤有机碳平衡方面的研究,发表论文4篇.E-mail:yfyin@issas.ac.cn
  • 基金资助:
    国家杰出青年科学基金项目(40125004)和中国科学院知识创新工程重大资助项目(KZCX1-SW-01-05).

Dynamics of fluvo-aquic soil organic matter fractions under long-term fertilization

  1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing 210008, China
  • Received:2004-04-19 Revised:2004-06-28 Online:2005-05-15 Published:2005-05-15

摘要: 采用相对密度分组法对潮土有机质进行分组分析,研究长期施肥条件下不同施肥处理的土壤有机质、轻组有机质和重组有机质的动态变化.结果表明,在现有的施肥条件下,不施肥处理的土壤有机质、轻组有机质和重组有机质含量基本保持不变,而NPK(化肥)和有机肥处理的土壤有机质、轻组有机质和重组有机质含量均随施肥年限呈增加趋势,但前者年际间波动较大,增加幅度也远不如后者.回归分析发现,NPK处理的土壤有机质、轻组有机质和重组有机质均与施肥年限呈线性相关,而有机肥处理的土壤有机质、轻组有机质和重组有机质则随施肥年限呈对数函数变化规律.

关键词: 长期施肥, 有机质, 密度分组, 潮土

Abstract: By the method of relative density fractionation,this paper studied the dynamics of organic matter and its light and heavy fractions in a fluvo-aquic soil under long-term fertilization.The results indicated under current fertilization system,the contents of soil organic matter and its light and heavy fractions were basically unchanged within 13 successive years of no fertilization,but had an increasing trend with the duration of chemical fertilizer NPK and organic manure applications,with a larger fluctuation among years and a less increment in treatment NPK.Regression analysis showed that soil organic matter and its light and heavy fractions had a linear correlation with the duration of fertilization in treatment NPK,and had a logarithm correlation in treatment organic manure.

Key words: Long-term fertilization, Soil organic matter, Density fraction, Fluvo-aquic soil

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