| The land is the most basic natural resources of human society’s development. Along with the sustainable development of human society, the demand of land resources is in growing trend. The limited China’s land resources and growing demand of the amount of land constitute a special contradiction. Meanwhile, during the process of land development and utilization, the ecological and environmental problems of land are also prominent. Blind deforestation and reclaiming land from lakes have damaged the land ecological environment and increased soil erosion, soil desertification. Blind land development will form the simple and fixed environment. This will further damage the diversity of biological resources and increase the frequency and intensity of pests, eventually leading to regional eco-environmental degradation, thereby affecting regional economic development.Therefore, it is necessary to think about the sustainable utilization of land resources in a new perspective and idea. Circular economy was internationally recognized as a preferred mode to promote sustainable development strategy. Meanwhile, the core of circular economy is efficient and recycling, the principle of circular economy is "reducing, reusing, recycling", the basic characteristics of circular economy is "low consumption, low-emission and high efficiency", so it is economic development approach of advocating the harmonious development. Obviously, the circular economy can greatly improve the resource utilization, also be able to save a lot of the earth’s resources to prepare for the development and use of next generations. At the same time, it can reduce the emissions of pollutants and pressure on the environment. Therefore, it is very important to absorb the basic concept of circular economy. It has positive significance for co-ordinate regional development, intensive land resource, strengthening ecological construction, protecting the ecological environment, and realizing sustainable development.Based on this background, this paper systematically explores the meaning of Land Resource Recycling (LRR), patterns, control and evaluation by the circular economy theory, systems theory, cybernetics and other analytical methods. Further, this paper makes empirical research taking Jiangyan City in Jiangsu Province for example, in order to reasonably guide recycling of regional land resources to provide empirical evidence. This paper consists of nine chapters, the first 3 chapters are a fundamental part of this study, including introduction,domestic and international research, the basic concepts and theory. The 4～7th chapter is the theory and methods section in this research, systematically elaborates the meaning of LRR, discuss and summing up agricultural, the industry and the urban three kind of important land type LRR model,establish the reaction control LRR three-dimensional control model based on feedforward control, process control and feedback control, and use AHP method to build LRR evaluating indicator system. The 8th chapter uses panel data of Jiangyan from 1997 to 2008, empirically analyze the development of LRR in Jiangyan, combines and concludes its LRR model, control measures and implementation of the path. The 9th chapter has carried on the summary to this paper, and proposed the future work direction.Through theoretical and empirical research, this paper draw the following conclusion:(1) Absorbing the basic concept of circular economy from utilization of land resources, this paper proposed the "Land Resource Recycling",it provides the new possibility for transformation of utilization way of land resource. Land resource recycling is a general term for socio-economic activities, this activity follows the "3R" principle of circular economy, it is based on land natural attributes, includes land management and integrated remediation. Land resource recycling may realize the best utilization of land resource from three dimensions including quantity, the time and the spatial, from four planes including land clean production, within the industry, between industries, production and consumption of the land output.(2) In order to promote the land resource circulation use, achieve the goal of land resource sustainable use, it must select the scientifically and reasonable model of land resource recycling. The LRR model organizes the development and utilization of land resources in certain region following "3R" principle of circular economy, using symbiosis, regeneration, self-theory, multi-component mutual coordination and promotion of the function principle of ecological economy, by multi-level material and energy use and transformation of multi-channel principle, in order to build land use pattern that is the rational use of natural resources, maintain ecological stability and sustainable and efficient function. Planar structure, three-dimensional structure, temporal structure and food chain structure is the basic structure of LRR, any complex land use pattern is formed with them. For agricultural, industrial and urban sites in three important types of LRR models are mainly recycling of niche development and utilization of three-dimensional model to methane as a link with agriculture, forestry, animal husbandry and fishery-based land-use model, physical energy of the food chain, the use of multi-level structural model, "Eco-garden" type of land use model, land-use model comprehensive management, industrial ecology park land-recycling model, compact urban land use model. Research suggests that a combination of different sectors and regions characterized by differences in land use to select the appropriate cycle of local conditions of LRR models, vigorously develops the circular economy and achieves the goal of sustainable use of land.(3) The key Achieving the LRR is to control. Based on the number of dimension, space dimension, time dimension of LRR and the conceptual model of land by three-dimensional control model of recycling, it is divided into three main control phases including the feedforward control, process control and feedback control. It forms the a complete control chian taking the evaluating indicator system as the control standards, the land user as the control foundation, the government department supervision as the control methods, inspects as the control safeguard,and to achieve complete control of the situation of LRR. In the process control, it carries on the analysis through the structure gambling model to demonstrate that circulates the land process control two major-domos the central authorities as the land user, effectivly modifies "the government malfunction" the question can carry on the effective correction. It proposed the recent enlightenment for the present supervision model.(4) The construction of evaluation index system of LRR is the basis of froming theory into practice. This paper build a LRR evaluation systemusing AHP method. In order to measure the development level of LRR. The author selects 25 evaluation indexes from the investment reduction of land resource, the re-use of land resource, the safety of land resource background, economic and social development to build evaluation index system using AHP method, and applies it in Jiangyan City in Jiangsu Province. The results showed that the Jiangyan LRR level from the whole looked is in the trend of escalation, and has been slightly higher than Jiangsu Province level, especially in the land resource security target superiorly in the entire province, Jiangyan is obviously based on the ecological agriculture and the environment improvement’s LRR systems control result, this has provided the experience evidence for the reasonable guidance regional LRR. |
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