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cje ›› 2005, Vol. ›› Issue (3): 335-338.

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Dynamic simulation of phosphorus nutrient in crop-soil system

ZHUANG Hengyang1,2, CAO Weixing1, LIU Chuansong 1   

  1. 1. Key Laboratory of Crop Growth Regulation, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China;
    2. College of Agriculture, Yangzhou University, Yangzhou 225009, China
  • Received:2003-08-26 Revised:2003-11-03 Online:2005-03-10

Abstract: The dynamic simulation models of phosphorus nutrient in crop-soil system were developed in this paper.In the models of phosphorus dynamics,maximum phosphorus absorption capacities were estimated with the concentrations of metal oxides in acid soils and with the clay percentages in other types of soils.The relationship between total available phosphorus and the equilibrium solution phosphorus concentrations in soil was described with the Langmuir function.The functional relations of above-ground critical phosphorus concentrations to PDT were established.The models were tested by phosphorus concentrations in wheat plants,indicating satisfactory agreements to the experimental data.

Key words: CO2 concentration, Changbai Mountains, Broad-leaved Korean pine forest, CO2 exchange

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