Research On Optimization Of Land Use Structure In Lanzhou

The optimizing of land-use structure in Lanzhou was studied based on the economic benefit and ecological green equivalent with linear programming method. The results show that: 1) When the scale of cultivated land is constrained, the existence solutions of the land-use structure optimization and its'rationality are decided by the grain yield per hectare and the grain objective per capita .When the grain objective of per capita is 450kg, compare with the current land use condition , to increase grain yield per hectare and to reduce cultivated land properly are practical and feasible land-use strategy in order to meet the need of the optimizing of land-use structure. 2) When the scale of cultivated land is not constrained, in order to get the target level optimization solutions of the food and clothing, comparatively well-off and well-off's per capita share of grain objective , it requires cultivated land area substantially increase, but the substantial increase the area of cultivated land is not realistic; thus, to increase grain yield per hectare and to increase cultivated land properly are practical and feasible land-use strategy in order to meet the need of the optimizing of land-use structure. 3) By increasing grain production per hectare , increasing cultivated land properly, and other means to pursue the goal of a well-off land-use optimizing structure is more reasonable. Finally ,consulting the grain yield per hectare increase, the size of cultivated land control , feasibility of the optimize program's implementation, as well as a comprehensive land-use efficiency, and other aspects of the optimization program, choose the program as the 2010 land-use Optimizing structure adjustment .This program is tally with economic benefits of Lanzhou City's social. 4)In order to increase eco-efficiency of land use, garden and woodland area should be raised in the optimization program; grassland and unused land would reduce slightly; among construction lands, except rural residential land, the other types would increase.5)Based on the two programs in forward, finally the article produced one optimal project as the optimizing of land-use structure in Lanzhou, this answer not only satisfied economic benefit mostly but also achieved the goal of ecology, it is the combination of the two.6)Because the society benefit is too difficulty to estimate, this article try to combine the economy benefit, society benefit and eco-efficiency with restrictions. From restrictions and objective function to incarnate Multi-objective optimize.7) Increasing the intensive land use, progressing the productivity of the cultivated land through land consolidation, use eco-function of grassland plenty, increasing forest coverage rate of construction land are feasible measures to achieve the comprehensive benefits of land-use-structure optimization in Lanzhou.