Sustainable Utilization Evaluation On Cultivated Land Resources In Zhejiang Province

Recent years, global change research has mushroomed. As an important part of the research, the land-use change-driven and sustainable evaluation have won more and more emphasis. Cultivated land resources is productive resources, which is basic resources of agricultural production and sustainable development of the national economy. Evaluating the sustainability of cultivated land resources is basis for the using and protection of cultivated land resources.Zhejiang is one of the most developed provinces of China, whose regional land use structure is changing significantly in time and space with the development of industrialization and urbanization. The most obvious change is the reduction of cultivated land and the increase of construction land. Therefore, based on land redistributed data and socio-economic data, this article analyzed the temporal and spatial changes in land use, the change of cultivated land use and the driver factors in Zhejiang Province, established indices system, and evaluated the cultivated land sustainable utilization of Zhejiang was. The main obtained conclusions are as follows:1. Present land-use characteristics: total land resources of Zhejiang is less, land resources per capita is only 0.23 ha / person, less than 1/3 of the national average in 2006. The per capita area of land distribution is imbalances in space, and the most is 0.69 ha / person in Lishui, while the least is only 0.12 ha / person in Jiaxing.2. Land-use change: during the period of 1996-2004, the time and space change of land use in Zhejiang Province mainly embodied in land-use types decreasing year by year, including agricultural cultivated land, garden, other agricultural land and unused land and other land use types etc. Zhejiang land-use changed largely in space structure, and presented obvious geographical differences. The greatest change lies in Ningbo, followed by Jiaxing and Huzhou. The land-use composite index of whole province was 232.13 in 1996 and 234.18 in 2004. During the study period, the change rate R of land-use extent in Zhejiang was above aero, showing that the land use of Zhejiang Province is in under development.3. The change and status of cultivated use: the cultivated land area of Zhejiang Province was 1594.43kha in 2006, occupying 1.23 percent of the country's total cultivated land area. But the per capita cultivated land is small, only 0.034 ha, less than 1/4 of the national per capita cultivated land area. The largest area of cultivated land in Jiaxing city was 212.31kha, account for 13.32 percent of the cultivated land of the whole province, as the smallest in Zhoushan city was 16.61kha, account for 1.04 percent of the cultivated land of whole province. From year 1978 to 2006, the cultivated land of Zhejiang province once showed downtrend, with a net decrease of 228.6 kha. The change of cultivated land can be divided into two stages: the change was fast from 1978 to 1996 and the change alleviated from 1996 to 2006.4. Analysis of change-driven factors for the sustainable use of cultivated land resources: the indices system was established according to the relevant principles, and studied by correlation analysis and principal component analysis with SPSS13.0 statistical analysis software. According to principal component loads, the 18 factors selected can be classified as four categories: the population growth, economic development, urbanization and industrialization, agricultural development, etc. It can be drawn through the above analysis that the four factors are the dominant socio-economic factors of the land-use change in Zhejiang Province.5. Sustainable evaluation of cultivated land use: sustainable evaluation system for land use in Zhejiang Province was builded with the 37 first grade indexes selected from five criteria composed of the production, stability, protection, economic viability and social stability. With the method of AHP, targeting weight of all levels, the integrated level of sustainable cultivated land use was calculated as 61.77 in 1996 and 77.88 in 2006, which indicated realized transition from the preparatory phase to the initial phase of the sustainable use. The results should be gratified, but there is still a certain distance and a larger space for development, compared with achieve sustainable stage above 90.