Research On The Calculation And Distribution Of Carbon Sinks Of Upland Ecosystem In Heilongjiang Province

The climate problem caused by global warming is becoming more and more serious.The global ecological environment crisis brought by global warming,from natural disasters to the disruption of biological chain,is gradually threatening human life.The main factor of climate warming is the excessive exploitation and utilization of energy and natural resources by a large number of human activities,which leads to a large amount of greenhouse gas emissions.Therefore,developing a low-carbon economy and strictly controlling greenhouse gas emissions is a strategic choice to deal with climate change.Dry farmland ecosystem are both carbon sources and sinks,soil carbon reserves are large but agricultural activities are an important source of greenhouse gas emissions.Based on the scientific research on the dynamic change trend and influencing factors of carbon emission and soil carbon sequestration in dry farmland,it is of great significance to reduce to reduce emissions and increase sinks,which is helpful to the green and healthy development of dry farmland agriculture.The main research work and results are as follows:1)the carbon sink methodology of dry farmland ecosystem is constructed.According to the technical standard of"monitored,reportable and verifiable",based on the existing conservation tillage emission reduction enhancement projects methodology,this paper studies the greenhouse gas emission reduction and sink increase in upland ecosystem methodology,studies the applicability of the calculation method,analyses the calculation method of N₂O and CO₂ from each agricultural input,analyses the calculation method of soil carbon sequestration,and based on this method,this study proposes a general estimation method to estimate the carbon sequestration.2)the spatial and temporal characteristics and influencing factors of carbon emissions in upland ecosystem in Heilongjiang Province are analyzed.According to the carbon sink methodology of upland ecosystem and the estimated results of agricultural inputs such as nitrogen fertilizer,straw mulching,diesel oil,agricultural film and pesticide in Heilongjiang Province from 2000 to 2017,The change law of carbon emission in dry farmland is analyzed at provincial and municipal levels.By using Arc Gis software to map and analyze the carbon emission differences among cities and districts in Heilongjiang Province,the main causes of carbon emission are analyzed by using LMDI model.3)the spatial characteristics and influencing factors of soil organic matter content and soil carbon sequestration in dry farmland ecosystem of Heilongjiang Province are analyzed.The organic matter content and soil carbon sequestration in dry farmland of Heilongjiang Province during the second soil survey and soil formula fertilization project are analyzed.The spatial characteristics of organic matter content and soil carbon sequestration in each county and region of Heilongjiang Province are analyzed by using Arc Gis software,and the main influencing factors of organic matter content and soil carbon sequestration in each county and region of Heilongjiang Province are obtained based on correlation and regression analysis.4)the spatial and temporal characteristics of net carbon sink in upland ecosystem in Heilongjiang Province are analyzed.The net carbon sink of dry farmland in Heilongjiang Province during the period of soil measurement formula fertilization project is analyzed,and the spatial differences of net carbon sink of cities and districts in Heilongjiang Province are analyzed by using Arc Gis software.The advantages and disadvantages of carbon sequestration in dry farmland of Heilongjiang Province are analyzed,and the countermeasures and Suggestions for carbon sequestration in dry farmland of Heilongjiang Province are put forward.Based on the study on the variation of carbon emission and soil carbon sequestration in dry farmland ecosystem and the analysis of influencing factors,this paper puts forward five suggestions to promoting low-carbon agricultural production,improving agricultural production efficiency,promoting agricultural labor transfer,optimizing agricultural production structure and improving agricultural carbon emission supervision system,which will help the dry farmland ecosystem of Heilongjiang Province to reduce greenhouse gas emissions.As well as measures to improve soil properties,improve soil organic carbon content,and protect cultivated land resources,such as increasing the intensity of straw returning to the field,rational allocation of organic fertilizer,precise dry farmland irrigation,etc.,the dry farmland ecosystem of Heilongjiang Province can improve the ability of reducing emissions and increasing foreign exchange,and promote the development of low-carbon agriculture in Heilongjiang Province.