西安地区农作物生产过程中碳排放估算

Carbon emission calculation in crop production in Xi'an

为了解西安地区农作物种植过程中投入方面所产生的碳量的时间变化和空间差异,为发展低碳农业提供科学依据,从化肥、农膜、农药和农业机械的使用4个方面对西安1989年、1990年以及1995到2011年农作物生产过程中碳排放量以及碳排放强度进行了估算,修正了碳排放强度计算方法,提出了发展低碳农业的措施.结果表明:从1989年到2011年,西安地区农作物生产过程中碳排放总量成增加趋势,碳排放强度也成增加趋势,化肥的使用是西安农作物生产过程中碳的最主要来源,2011年西安碳排放总量及碳排放强度空间差异明显.

In order to understand the temporal change and spatial difference of carbon release in crop production at the plantation stage in Xi＇an, and to provide scientific basis for low-carbon agriculture, the carbon emissions and their intensities in crop production in Xi＇an during the period 1989 to 2011 were calculated from utilization of chemical fertilizer, agricultural plastic films, pesticide and agricultural machinery. The calculation method of carbon emission intensity was revised. Measures for low carbon agriculture were put forward. The conclusions are drawn as follows： The carbon emissions increase on the whole from 1989 to 2011; The carbon emission intensity also increased; Fertilizer is the main source of carbon emission in Xi＇an; The spatial differences of carbon emission and its intensity are obvious in 2011.