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cje ›› 1993, Vol. ›› Issue (6): 37-40.

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Quantintive Characteristics of Energy Flow and Nutrient Cycling of Farmland in a Farm Ecosystem in Hexi Corridor

Li Fadi   

  1. Department of Animal Husbandry Gansu Agricultural Unitversity
  • Received:1992-06-01 Online:1993-12-10

Abstract: Quantitative characteristics of energy flow and nutrient cycling of farmland subsystem in a farm ecosys-tem in Hexi Corridor were studied.The results showed that the deflree of opening,input and output were high,the ratio of output to input of subsidy energy,nitrogen and phosphorus of the farmland subsystem was 3.11,0.79 and 0.49 respectively.

Key words: big-spike wheat, yield, photosynthetic characteristics.