Huang Xian-jin

Characteristics of Carbon Emission in China and Analysis on Its Cause

Abstract From the history of human economic development, it is known that there is a close relationship between economic development and environment quality. Thus, in this study a factor decomposition model of carbon emission in China is built and the contributions that economic scale, industrial structure, and carbon emission intensity make to carbon emission quantitatively from 1990 to 2005 are analyzed, in other words—scale effect, structural effect, and technical effect—using the decomposition method of average distribution cushion which is based on the environmental Kuznets curves model is studied. The result suggests that the average of the effect changes of carbon emission in China is 19.55%, the effects brought by economic scale, industrial structure, and carbon emission intensity are 15.76%, −0.86%, and 4.65%, respectively. In general, the relation between carbon emission and Chinas economy was more like an “N” curve; Economy scale is a primary drive factor and has incremental effect to carbon emission. Since otherness of different industry is getting bigger, the industrial restructure has certain decremental effect to carbon emission, but the restrictive function is not obvious, the industrial structure still need to be further optimized; the technical effect is positive and its volatility is large. From the perspective of reducing carbon emission, the current technology has not played to its advantages. This study will promote the understanding of the theory about the relationship between carbon emission and economy development and provide reference value by all means to the adjustment of industrial development.

Influencing Factors of the Levels of Intensive Use of Typical Industrial Land

Abstract The article establishes an evaluation index system of the intensive land use from the perspective of enterprises. It is based on the questionnaire survey and evaluates the levels of the intensive use of the land in the electrical machinery and equipment manufacturing industry in Changzhou, Nantong, and Yancheng of Jiangsu Province. The evaluation result shows that there is obvious difference in the levels of the intensive use of the land in this industry in the three cities. The present article makes a detailed analysis on the causes of the difference. The analysis shows difference in results of the socio-economic and urban development stage, industrial features, population density, and technological progress. Finally, it proposes some suggestions to improve the efficiency of the industrial land use.

Urban Land-banking Planning: A New Instrument to Regulate Urban Land Supply-demand of Nanjing City

Abstract It is the major purpose of the paper to present the urban land-banking planning and its functions of promoting the urban land-banking system and land use administration. The urban land-banking system has the potential attribute of acting as an irreplaceable role in urban land administration, but its unexpected function-deviation has impacted its implementation effect in China. A few city governments are attempting to deal with the problem by the urban land-banking planning which is expected to contribute to the extension of urban function, optimization of urban patterns, promotion of urban core competitiveness and overall construction of the urban value chain. In this paper, we primarily discuss the necessity, functions, purposes and main contents of the urban land-banking planning. Subsequently, the implementing situation of the urban land-banking system in Nanjing is analyzed, including its integrated mode, spatio-temporal quantitative distribution and main characteristics. Finally, the background and targets including total, compositions, space, and regulation points are gradually introduced to present the Nanjing land-banking planning version 2.

A Review of Farmland Fragmentation in China

Abstract: Here, we describe research on farmland fragmentation using the summary and comparison analysis approaches. The definition of farmland fragmentation, main research fields and measurement methods are reviewed. The connotation of farmland fragmentation is clear and has been widely recognized, but methods for determining fragmentation require further work. Farmland fragmentation research in China mainly focuses on the causes and its effect on agricultural production, particularly the negative impacts. The relationship between farmland fragmentation and land consolidation has received increasing attention; the relationship between farmland fragmentation and land transfer less so. Research in this area mainly draws on economic research methods, and geographical spatial analyses are absent. Several suggestions are made, including additional comparative studies across different areas based on different economic and social backgrounds; strengthening research on the relationship between farmland fragmentation and the comprehensive regulation of rural land; and adoption of RS and GIS methods.

Comprehensive Assessment of Regional Circular Economy Development Based on Efficiency of Resource & Environment: A Case Study of Jiangsu Province

Abstract In the first, the paper gave a retrospective analysis on the comprehensive assessment of circular economic development. According to the requirement of improving resource & environment efficiency, the paper designed an analytical framework for a comprehensive assessment of regional circular economic growth, which consists of the goal, object and technical line of the comprehensive assessment of regional circular economic development. Given that, the paper discussed the criterion for choosing the assessment index, the approaches of indexs weighing determination, the means of data standardization, and the reference system of assessment index value and so on. According to the framework of regional circular economic development evaluation, the paper made a comprehensive evaluation of Jiangsu Provinces circular economic development. The result shows that from temporal change, Jiangsu Provinces circular economic development had different stages; from the spatial comparison, there is variance among different regions, which could be divided into different types according to the spatial variance and the relation between the development of circular economy and the aggregative index number. There was a remarkable correlation between circular economic development level and GDP or the 2nd industry GDP. Finally, the paper gives some suggestions on how to promote the development of circular economy in Jiangsu Province.

SPATIAL DIFFERENTIATION OF LAND TRANSFER——Case Study of Shanghai, Nanjing and Taizhou in Changjiang River Delta

The policy of land transfer has greatly influenced the macro economy of China with the commencement of another innovation of land use system. Therefore, it is urgent to put forward some rational and feasible suggestions for local government to manage the market of land transfer. Moreover, it is important in the field of study on agricultural land use change to analyze the spatial differentiation and structural specification of land transfer, which are caused by rural households’ behavior. This paper selected 11 factors covering four aspects of rural households’ family structure, family location, family income structure and the natural quality of land resources, all of which influence the behavior differentiation of rural households, to establish the index model indicating spatial differentiation of land transfer. Results show that the spatial differentiation of land transfer can be divided into four degrees and three categories through analyzing rural households’ questionnaires from Shanghai, Nanjing and Taizhou in the Changjiang (Yangtze) River Delta. Since up to 80% of rural households belong to middle degrees, it can be concluded that the rural land market develops evenly in the study areas. And it is also indicated that the natural quality of land resources and the maximum income of rural land are most important factors influencing the spatial differentiation of land transaction. Considering different factors, the countermeasures can be carried out to enhance the spatial differentiation of land transfer so as to promote economic development and social security of rural China. All in all, both microfactors and macro-factors influencing rural households’ behavior of rural land transfer should be taken into account in order to make spatial differentiation and structural specification of rural land transfer notable.

Institutions policies and soil degradation:theoretical examinations and case studies in Southeast China

Abstract Southeast China is one of the severe soil degradation areas in China. This paper theoretically examines the impact of some important institutional arrangements and policies, like land management pattern, the rural off-farm employment, land property change and changes in prices of agricultural products, on soil degradation in this area. It further conducts some case studies to confirm the potential relationship between the institutions & policies and soil degradation, applying the surveyed and the second hand data. The paper at last makes some conclusions and proposes some suggestions on how to promote soil conservation by improving the ways of policy decision-making and the effects of policies on land use.

Land use change and analysis of environment impact of the buffer zone around Taihu Lake in Jiangsu Province

By interpretation of TM images respectively in 1990, 2000 and 2005, the map of current land use of the 5 km buffer zone around Taihu Lake in Jiangsu Province was compiled. Through overlaying, spatial analysis and statistic analysis supported by ArcGIS 9.2 software, the map of land use change rule and land cover in this area were showed, and the environmental impacts caused by the change of land use types were analyzed. It was shown that the change could bring a series of environmental issues, such as watershed soil erosion, industrial waste and pollutants flowing into the lake increase.

Differentiation of resources allocative efficiency in farmland conversion in China

The purpose of the paper is to study the resources allocative efficiency and dynamic variation characteristics of farmland conversion for nonagricultural use in China from 2000 to 2008, and analyze regional differences in resources utilization efficiency, in order to provide references for optimizing land resources allocation. Methods of DEA model and Malmquist TFP index were employed. The results indicate that: from 2000 to 2008, the comprehensive efficiency of farmland conversion of eastern and northeast China has decreased, while that of central and western China has increased, with significant rise in western regions; the rise of Chinas comprehensive efficiency of farmland conversion is mainly due to the contribution of pure technical efficiency, and the improvement of production efficiency benefits from technological progress. The study found that: although the comprehensive efficiency of farmland conversion in central and western regions has increased significantly, whether it could be used as the evidence for increasing farmland conversion quota is still under debate; at present the main task should be to further improve land use efficiency.

Research on scale and spatial distribution of regional virtual land retirement

Based on the analysis of current situation of cultivated land utilization in China and the research findings on land retirement from abroad, this paper suggests that land retirement could be an alternative for future cultivated land protection in China. Land retirement as a way of sustainable land use, can improve the quality of cultivated land and regional ecological environment, and ensure national long-term grain productive capacity and food security. Virtual research on land retirement of Tongzhou City of Jiangsu Province was carried out under different development scenarios. The results show that the practical scales of land retirement in Tongzhou City ranged from 661 hm2 to 6410 hm2 under different scenarios; the land retirement areas were mainly distributed in Shigang Town, Qian Town and Chuanjiang Town, etc. The virtual research provides useful references for future land retirement policy making in China.