TROPICAL GEOGRAPHY ›› 1995, Vol. 15 ›› Issue (3): 235-243.

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ANALYSIS AND EVALUATION OF THE AGRICULTURAL ECOSYSTEM IN KARST REGIONS OF GUANGXI

Lan Fushen, Mo Quanhui   

  1. Guangxi Institute of Bolony, Guilin 541006
  • Received:1995-02-01 Online:1995-07-30 Published:1995-07-30

Abstract:

Karst areas make up about 37.8% of the total area of Guangxi,which are characterized by their deteriorated ecological environments with poor and thin soils,sparse vegetation,unevenly ditributed rainfall and short water resources.Meanwhile,the interior structure of agricultural ecosystem is unreasonable,the input of nutrition and energy is less than the output,and the irra.tional exploitation of natural resources results in further deteriorahon of ecological environmonts,the dislocation of ecological balance,the increase of natural dialers,and the decrease of the sta bility and continuity of agricultural ecosystem.Those have affected the development of agricultural production and national economy,and people's life and existance in Karst regions.It is neces sary to regulate reasonablly the structure of agricultural production,to develop forestry in line with local conditions,to enhance environmental protection and harnessing,to incrase the input of nutrition and energy in agricultUral ecosystem.The authors consider that the development of agriculture in the regions should presuppose the solution of food and clothing problems for the lo cal people and the coordination with market economy,and should follow the direction of eco-agri culture and stereo-agriculture in order to achieve both long term and short term benefits.

Key words: Agricultural ecosystem, Karst region, Guangxi