The Studies On The Function Analyzing Of Agricultural Ecosystem And The Structure Adjusting Of Agricultural Production In Gonglama Country

In this paper we analyzed and compared the flow of energy, material and value of the farmland's ecosystem between the plain and the mound region from 1998 to 2002 in Gonglama country of Huhhot Helingeer County Inner Mongolia using the method of input-output analysis. We analyzed and estimated the function of the agricultural ecosystem by analyzing the coefficient of the agricultural ecosystem function of two regions. Making use of the method of linear programming, with the controlled condition of the labors, fund, lands and the other agricultural production factors, we established the optimum model and the adjusting strategy of the agricultural production structure in Gonglama country. As followed studied results:1. Plain region: Total input and output energy and the ratio of output to input energy allappeared increasing trends in farmland ecosystem, which indicated that the efficiency of the system energy has been increasing gradually. The nitrogen circulation is positive equilibrium, the phosphorus and potassium circulation are all negative equilibrium and becoming worse in farmland material circulation. Total fund of input and output in farmland and the ratio of output to input all appeared increasing trends, which indicated that the economic income has been increasing.2. Mound region: Total energy of input and output in farmland ecosystem all appeared increasing trends, therefore, the ratio of output to input energy is decreasing trend in farmland ecosystem, which indicated that the efficiency of the system energy has been decreasing gradually. The nitrogen phosphorus and potassium circulation are all negative equilibrium and becoming worse in farmland material circulation. Total fund of input in farmland is decreasing but output increasing, which indicated that the increasing of economic income is to give up the benefits of ecosystem environment.3. The function coefficient analyzing indicated that the economic v ecological and social efficiency has been all increasing obviously in plain and mound agricultural ecosystem, which has made the whole system function strengthened, and that of plain region is more obviously than mound region.4. The adjusting strategy: The farmers in plain region should increase to breed milch-cow and decrease to breed oxen, and increase to plant food-breed maize , maize for silage and alfalfa. The farmers in mound region should increase to plant economic crops and miscellaneous crops and beans guaranteeing to plant food crops concurrently, and plant breeding-crops adequately in order to satisfy the breeding requires; take advantage of the crop-stems and by-products efficiently to develop sheep breeding.