Analysis of Spatial and Temporal Evolution Factors of Carbon Sources/Sinks in Farmland Ecosystems—Taking Heilongjiang Province as an Example
Based on the data on agricultural inputs and crop sowing areas in Heilongjiang Province,the article used the LMDI decomposition model to measure the carbon sources/sinks of farmland ecosystems in the province from 2008 to 2021.The results showed that:①Carbon emissions from farmland ecosystems in Heilongjiang Province showed a rapid increase followed by a slow decrease,with CH4 produced by rice cultivation accounting for the highest proportion of carbon emissions at 59.66%.Carbon sequestration generally increased with an average annual growth rate of 3.85%,in which corn and rice increased greatly.②In terms of spatial change,carbon emissions per unit of the sown area showed a higher distribution pattern in the central and eastern parts of the country than in other regions,and carbon sequestration per unit of the sown area showed a higher distribution pattern in the east,south and west than in the north.③The analysis of carbon source/sink influencing factors shows that improving agro-ecological efficiency,optimizing agricultural production structure and controlling the scale of labour can effectively reduce carbon emissions.The carbon sink coefficient and the level of carbon sink technology have a promoting effect on carbon absorption,and in the future,we can strengthen precise management,improve the efficiency of intelligent agriculture,and enhance the capacity of carbon sinks.
farmland ecosystemcarbon source/sinkinfluencing factorsHeilongjiang province
国家科技期刊平台
NSTL
万方数据
