Author(s): Ru Yi, Harbin Normal University, Harbin Daowai District Centre for Disease Control and Prevention
Pages: 109-113
Year: 2015 Issue:  6
Journal: Natural Science Journal of Harbin Normal University
Keyword:  Agricultural ecosystem; Carbon source; Carbon sink; Heilongjiang Province;
Abstract: Used the relevant data of crop yields,planting area and agricultural inputs etc. in the period from 2004 to 2013,and the amounts of carbon absorption and emission of the farmland ecosystems in Heilongjiang Province were calculated. The variation characteristics and impact factors of carbon absorption and emission were analyzed. The results showed that the total amounts of carbon absorption appeared generally in increasing tendency,the carbon absorption of grain was significantly higher than economic crops and fruits- vegetables crops. The total amounts of carbon emission appeared a steady upward trend,and chemical fertilizer was the main source. The correlation analysis results showed that carbon absorption was significantly positive correlated with the crop yields of rice,wheat and corn,and significantly negative correlated with the crop yields of sunflower seeds,hemp and fruit crops. Significant positive correlations were observed between carbon emission and chemical fertilizer, agricultural energy consumption, drip irrigation and canal seepage control irrigation area,and significantly negative correlated with the low-pressure pipe irrigated area.