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cje ›› 1987, Vol. ›› Issue (1): 14-19.

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Nutrient Circling and Energy Transformation in Agroecosystems of Salinized Farmland in Different Stages of Improvement

Li Weijiong1, Li Yimin2   

  1. 1. Beijing Agricultural University;
    2. Chinese Institute of Paddy
  • Received:1986-04-16 Online:1987-02-10

Abstract: The nutrient circling and energy transformation in the wheat-corn cropping system wasstudied in three sites with different production levels respectively in Quzhou County,Hebei Province.

Key words: Chlorophyll-a, Degradation, Superoxide dismutase