Research On The Ecological Carrying Capacity Of Land In Daqing City

Daqing City as an important national energy reserve base and a major grain-producing city,the changes of the land ecological carrying capacity have limited the output of resources to some degree,which in turn will be product an important impact on the regional socio-economic development,national energy and food security.In recent years,with the intensification of a series of land ecological destruction behaviors such as over-exploitation of resources,rapid expansion of the city scale,a large number of land reclamation and overgrazing,the land ecosystem of Daqing City is facing tremendous pressure,and the imbalance in supply and demand of resources is becoming increasingly serious.Based on the original intention of solving the current ecological problems in Daqing City and optimizing the regional land ecological carrying capacity,in this study,the current land ecological carrying capacity and influencing factors of the overall and various administrative regions of Daqing were studied thoroughly,and put forward some relevant countermeasures and suggestions.The present situation of land use in the study area was analyzed,and based on the production of biomass,the productive land area,energy consumption and other statistical data,the overall situation of Daqing,and Zhaoyuan County,Zhaozhou County,Lindian County,Daqing City,Dumeng County,the five administrative regions of the ecological footprint and ecological carrying capacity were estimated.By combining the calculation results of ecological footprint,ecological carrying capacity,ecological deficit / surplus,ecological pressure index and coefficient of land coordination,the land carrying capacity and various regions of Daqing was judged.The partial least square method was used to make the quantitative screening of influence factors,and the main influencing factors of the ecological carrying capacity of the land in Daqing are obtained.The specific conclusions are in the following aspects:(1)The ecological carrying pressure of land in Daqing was great.All indicators indicated that land-use of Daqing city was in an overdraft state,regardless of the total number of productive land areas consumed by production and life in Daqing city and its administrative regions.From the perspective of ecological deficit,the ecological footprint measured by the research area was far greater than the ecological carrying capacity.From the ecological pressure index and the coordination coefficient of land carrying capacity,the level of ecological pressure on most of the land in various regions was in an unsafe state,the coordination coefficient of land carrying capacity was always lower,which also confirmed the conclusions expressed by theecological deficit,the pressure of land resources in Daqing and its all regions has exceeded its carrying capacity range.(2)The ecological carrying pressure of land in Daqing city will remain an increment tendency.During the study period,the ecological pressure of land in Daqing was expanding while the coordination coefficient of land carrying capacity was decreasing.There were four main reasons for this: firstly,with the acceleration of urbanization process,the land pressure of construction land was increasing,which resulted in more and more urban land occupied by the urban area,and the bearing pressure of productive land was increasing.Secondly,due to the position of Daqing in the national grain pattern,the large outflow of its productive resources were also an important reason for the expansion of the land carrying pressure.Once again,as the disordered cutting of trees,it still taked time to make up for the overdraft of the woodland production.Finally,Daqing as a mature resource-based city,the second industry occupied a dominant position,the ecological footprint of fossil fuels has become an important contributive part of the ecological deficit.(3)The ecological bearing pressure was unbalanced in various regions of Daqing city.According to the research results,there were great differences in land carrying capacity in five areas of Daqing,which is mainly related to the productive land area and population density.Overall,Zhaozhou county,Zhaoyuan county,the city's ecological pressure index was larger,the coordination degree of the land was poor,while Lindian county and Dumeng county,although the ecological footprint of two county level was very high,but as the abundance of land resources and less population,the ecological carrying capacity was significantly higher than the other three regions,the pressure of land carrying pressure was slightly better than other areas.(4)The factors affected the ecological carrying capacity of land was various in Daqing.Through PLS analysis and verification,agricultural fixed assets investment amount,annual growth rate of GDP,the proportion of the third industry,the total retail sales of social consumer goods,the total agricultural output value,such five kinds factors was highly significant,while per capita disposable income of residents,per capita GDP,fixed assets investment,total industrial output value,traffic volume,total population,city level,the total energy consumption were significant.This included social response factors and economic factors.Thus,there are many reasons for the changes of land carrying capacity in Daqing.According to the research results,combined with the actual environment,the optimization measures and countermeasures aimed at the current land ecological carrying capacity of Daqing city were recommended,including the adjustment of industrial structure,economic transition and population contral,and the improvement of population quality,the reasonable land use planning is going according to the local conditions.