Zhu C.,China Agricultural University |
Zhu C.,Key Laboratory of Agricultural Land Quality and Monitoring |
Zhu C.,East China Institute of Technology |
Hao J.,China Agricultural University |
And 5 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2015
In order to improve farmland quality, the basic condition of cultivated land and its social suitability must be taken into account simultaneously for high quality farmland evaluation and construction. Therefore, with these requirements and objectives, the evaluation index system and identification model of cultivated land comprehensive quality were established. The index system was from three impact factors including land fertility level, land leveling project, infrastructure in cropland. Thirteen specific indicators including surface soil texture, profile pattern, degree of salinity, soil organic matter, drainage conditions, et al. were selected and analyzed. The weight of each evaluation indicator was determined by Delphi method. With GIS spatial analysis tools, the comprehensive quality suitability for high quality farmland construction was discussed by using the attribute hierarchical model (AHM) and exploratory spatial data analysis (ESDA). On the platform of study on external environment of high quality farmland construction, the index of rural households' comprehensive willingness consisting of the willingness of farmland quality improvement, adjustment of blocks, and scale of operation was constructed. This paper explored the correction model based on the index of rural households' comprehensive willingness, and the index of cultivated land comprehensive quality was modified in terms of rural households' comprehensive willingness. According to the grades of cultivated land comprehensive quality and the data of rural households' comprehensive willingness, the patterns of "comprehensive quality-comprehensive willingness" of high farmland construction could be obtained. The comprehensive suitability for time sequence and zone partition of high quality farmland construction and the concrete project of construction were discussed by using the diagnosis model and the combination of relative limited types. At last, on the platform of the investigation on rural households' comprehensive willingness, Quzhou county was used as a case study. Conclusions from the study can be drawn as: 1) The global spatial autocorrelation of cultivated land comprehensive quality was significant at 0.05 confidence level. The spatial clustering phenomenon about cultivated land comprehensive quality appeared on the whole. Aimed at cultivated land comprehensive quality, the suitable area of high quality farmland construction was 22472.84 hm2, which accounted for 47.87 % of the studied area. There were 1298 construction blocks that were suitable for high quality farmland construction. These blocks were in three towns, Anzhai, Disituan and Baizhai; 2) The study zones were divided into three patterns, high quality-low willingness (HQ - LW), low quality-high willingness (LQ - HW), and medium quality-medium willingness(MQ-MW); 3) The recent construction of high quality farmland should be arranged in zone one and the main directions were land leveling project and land block adjustment. The area of comprehensive suitability zone one was 13714.22 hm2, accounted for about 29.22% of the studied area. The comprehensive suitability zone two was mainly located in Nanliyue and Houcun. Land fertility level and organic matter were main limiting factors. The long-term construction should focus on the comprehensive suitability zone three. Leading limitation types were infrastructure in cropland and land fertility level. ©, 2015, Chinese Society of Agricultural Engineering. All right reserved.
Xue J.,China Agricultural University |
Xue J.,Land Consolidation and Rehabilitation Center |
Xue J.,Key Laboratory of Agricultural Land Quality and Monitoring |
Yun W.,Land Consolidation and Rehabilitation Center |
And 5 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2012
The land use pattern is an overall description of the land use type in the aspect of space, which directly influences the ecological service function of the regional land and relates to the social and economic value of the regional land. There are not only modern agricultural areas (the state farm areas) with the detailed land planning design and high level of mechanization and scale, but also traditional agricultural areas (the local government areas) which are reclaimed by the peasants at random, with backward productive level and scatter management in the Fujin City of Heilongjiang Province. To provide basis for the land consolidation, the differences of the land-use landscape pattern between the state farm areas (the modern agricultural areas) and the local government areas (the traditional agricultural areas) in 2009 were analyzed in this study. Fujin City of Heilongjiang Province was taken as the research area, and the database result of the second land survey as the data source. The results showed that the agricultural infrastructures in the modern agricultural area were criss-cross and orderly with sound systems, but the forest belt, road and trench were interspersed, disorderly and unsystematic in the traditional agricultural area. In modern agricultural areas, the density of the forest network was 1.72 times of that in the traditional agricultural area, the density of the road network was 1/2 of that in the traditional agricultural area and the density of the trench network was 2.3 times of that in the traditional agricultural area. The agricultural infrastructures such as the forest belt, road and trench in the research area form the framework of the regional land use pattern, and directly influence the scale and shape of various plots. The plaque shape of the farmland in the traditional agricultural area was slightly more complex and the shape index was a little higher than that in the modern agricultural area. The garden plot, forest land, grassplot, other lands, town and village and mining land were scattered in Fujin City, whereas the farmland spreaded all over the whole research area, form the regional landscape matrix. The farmland in the modern agricultural area accounted for 72.43% of the whole area, which was lower than 81.76% of the traditional agricultural area. The dry land in the modern agricultural area accounted for 46.33% of the total farmland, the area of the paddy field accounted for 53.67%, and the irrigable land accounted for 0.01%. The dry land in the traditional agricultural area accounted for 86.77% of the total farmland, the area of the paddy field accounted for 12.86%, and the irrigable land accounted for 0.27%. The land scale managed by the relatively independent production and management entity in the modern agricultural area and in the traditional agricultural area was different, leading to the different investment, using methods and the regional land use pattern. The land consolidation should be developed in the traditional agricultural area, to promote the effective integration of the farmland with the high standard, modern farm machinery, modern agriculture and modern peasants (or agricultural enterprises), and finally promote the development of the modern agriculture. The comprehensive benefit comparison and analysis of the land use should be developed from now on to provide a reference for the reform of the rural land system in China.
Meng P.,China Agricultural University |
Meng P.,Key Laboratory of Agricultural Land Quality and Monitoring |
Hao J.,China Agricultural University |
Hao J.,Key Laboratory of Agricultural Land Quality and Monitoring |
And 4 more authors.
Journal of Food, Agriculture and Environment | Year: 2014
The purpose of this study was to provide a basis for sustainable Chinese urban development based on data analysis and empirical contrasts. Our study revised and improved the assessment of the ESV (ecosystem service value) related to whole land use types. The ESV estimation method for construction land is based on substitution cost methods, cost-prevention methods and shadow-price methods. This analysis uses a typical analysis framework to evaluate the environmental quality PSR (Pressure - State - Reason). The results demonstrated that the relationship between urbanization level and ecosystem service values per unit area presents a Kuznets inversed U Curve. The ecosystem service values per unit area for moderate urbanization are higher, whereas those of the primary and mature stages are lower. Therefore, the occupation of less farmland, the intensive use of construction land and the preservation of the environment are wise choices for new urbanization development models under reasonable environmental policies.