Carbon footprint of spring maize production system on state-operated farm in Northeast China Plain

摘要

In order to calculate the carbon footprint of agricultural production on farm, this paper, based on the investigation data of the farmer's production, applying carbon footprint model, evaluated the carbon footprint (CF) of spring maize production systems (SMPS) on farm and its production teams in Northeast China Plain. The results were as follows: the CF of SMPS was 863.14.42±104.17 kg CO_2e ha~(-1), in which chemical fertilizer accounted for 44.60%, mechanical operation accounted for 42.96%, seed accounted for 9.96%, and pesticides accounted for about 2.48%, respectively. The CF of SMPS in different production teams were significantly different (P＜0.01), 18th production teams was the highest (958.37±81.73 kg CO_2e ha~(-1)) and 19th team was the lowest (767.84±45.98 kg CO_2e ha~(-1)). The differences of the CF of SMPSR among production teams almost was resulted from nitrous fertilizer using. Therefore, it had the potentiality of emission reduction in the production teams with higher CF. Using a fertilizer-saving way to build a low-carbon agricultural cropping pattern, that is an important way to realize agricultural energy saving and emission reduction of farm in the Northeast China Plain.