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cje ›› 2004, Vol. ›› Issue (5): 228-231.

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Effect of organic manure application on the fixation of potassium in brown soil & meadow soil

YANG Chunlu1,3, LIANG Chenghua2, SUN Tiehang1, CHEN Xinzhi2, DU Liyu2   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2. Department of Soil and Environment, Shenyang Agricultural University, Shenyang 110161, China;
    3. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2004-02-12 Revised:2004-04-23 Online:2004-10-10

Abstract: The characteristic of K-fixation on farming brown soil & meadow soil in Shenyang area and the effect of organic manure application on K-fixation was studied with constant moisture at water holding capacity and wetting-drying incubation experiments.In all studies,483.72 mg K·kg-1 soil was applied before monitoring of K fixation.Results indicated that the process of fixation to extra-K was rapid in both of the two soils,and the fixation reaction reached equilibrium within 1day on field capacity incubation. The K-fixation capacity can be increased by 26.80%~33.27% with wetting-drying incubation compared to constant field capacity incubation.The power of K-fixation can be decreased by organic manure application with both kinds of incubation.The capacity of K-fixation decreased 25.71% and 36.62% on brown soil and meadow soil respectively after 15 days of wetting-drying incubation with 6% organic manure applied.

Key words: Cucumber, Rhizosphere, Pathogen, Antagonistic bacteria, Population number

CLC Number: