Scientia Agricultura Sinica ›› 2009, Vol. 42 ›› Issue (11): 3933-3939 .doi: 10.3864/j.issn.0578-1752.2009.11.021

• SOIL & FERTILIZER·WATER-SAVING IRRIGATION·AGROECOLOGY & ENVIRONMENT • Previous Articles     Next Articles

Response of Typical Soil Phosphorus Evolution to Long-term Single Nitrogen Fertilization

QU Jun-feng, LI Ju-mei, XU Ming-gang, DAI Jian-jun, GAO Jing
   

  1. （中国农业科学院农业资源与农业区划研究所/农业部作物营养与施肥重点开放实验室）
  • Received:2008-10-06 Revised:2009-02-24 Online:2009-11-10 Published:2009-11-10
  • Contact: XU Ming-gang

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Abstract:

【Objective】 The influence of long term single nitrogen fertilization on the total P and Olsen-P of several typical soils in China was studied. 【Method】 The phosphorus changes of 6 typical soils under different cropping systems and climates were studied based on a 15-year long-term fertilization experiment in China. 【Result】 Results showed that total P and Olsen-P of all tested soils decreased, and the range of total P decrease was from 2.7% to 25.0%. The content of the total P with single nitrogen fertilization decreased more than that of non-fertilizer. The Olsen-P decreased to a value of about 4 mg?kg-1, and its decreased ratio was a few times higher than that of the total P. 【Conclusion】 Therefore, single nitrogen fertilization accelerated the decrease of the total P and Olsen-P, and the soils with low total P decreased much more.

Key words: long-term fertilization, single N fertilization, soil total phosphorus, Olsen-P

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