The Research Of The Six Central Provinces Low-carbon Crop Farming Based On Carbon-footprint

Nowdays,the climate change is the most serious global environmental problems. Climate change brings negative effect to the economy, deeply touched the water resources,ecological security, food security, and even endanger the survival of humanity. The main cause of climate change is that human activity emits large amounts of greenhouse gases into the atmosphere.The development of low carbon economy is the effective way to reduce greenhouse gas and ease the pressure on the environment. The second and third industry is the leading industry of carbon emission,which should take up the responsibility of reduction, but the rapid development of agriculture also brings greenhouse gas emission.In the agricultural development mode of "machine+chemistry= agricultural modernization",carbon emissions caused by agriculture in the process of production and management has become increasingly prominent as the the increasing need of the fossil energy and material. Agriculture has become China's second largest source of greenhouse gases and an annual growth rate of 5%. The development of low carbon agriculture is imminent. The central region is China's major grain producing areas as the national commodity grain production base and modern agriculture base.Agriculture supports the people's life and economic development. At the same time, it also brings a lot of environmental pressure.An analysis of the central region of the agricultural carbon footprint will reveal the impact of factors to give full play to the function of carbon sequestration of agriculture.Reducing the agricultural carbon emission to realize the target of China's 2020 carbon dioxide emissions per unit of GDP decreased 40%?45% than in 2005.In this paper the farmland ecological system is the research object, based on the analysis of present situation of agricultural development in central region.Analyzing the carbon footprint calculation of carbon emissions, carbon emissions intensity, carbon sequestration, carbon absorption intensity, and carries on the analysis of temporal and spatial evolution characteristics to put forward the suggestions for the development of low carbon agriculture. Based on this, this paper is divided into three parts. The first part includes the first, the second and third chapter. The first chapter mainly introduces the background and significance,also introduce the train of thought, the structure arrangement and research methods in this paper. The second and third chapter overview the domestic and foreign literature about carbon footprints and low carbon agriculture and related theories to absorb the experience and shortcomings of the previous research at the same time. The paper combines the theory of carbon footprint and low carbon agriculture in order to lay the theoretical foundation for the paper.The second part of this paper is the focus of the full text, including the fourth and fifth chapter. First of all the research methods of carbon footprint and data sources are introduced. The datas of the six central provinces come from 1998 to 2011 including the agricultural production input and crop yield statistics to estimate the farmland ecosystem carbon sequestration, carbon emissions and carbon footprint.It also analyzes the temporal and spatial evolution characteristics. In the accounting of carbon emissions, the paper only considers five kinds of indirect pathway of carbon emission. According to the characteristics of farmland ecological system, the Kaya equation is improved to build an equation of the agricultural efficiency, the structure of agriculture and agricultural scale identities.The paper uses the logarithmic mean decomposition (LMDI) to analyse the impact factors of carbon footprint.The results show that carbon absorption, carbon emissions and total carbon footprint of the six central provinces are a growing trend. The intensity of carbon emissions grow raptly.The carbon absorption grows slowly.The carbon footprint of arable land units showed a rising trend. Carbon storage capacity of aggro ecosystem is a narrowing trend.The development of agricultural economy is the main factor to improve the carbon footprint of increasing agricultural production. Improving the utilization rate is the inhibitory factors the key to decrease the carbon footprint.The optimization of agricultural structure is in inhibition of carbon footprint in a certain extent, but the effect is not obvious.