陕西省农业投资活动碳排放时空变化与脱钩弹性

Temporal and spatial variation of carbon emissions of agricultural investment activities and decoupling elasticity in Shaanxi province

基于化肥、农药、农膜、翻耕、播种、农机总动力等6项主要农业投资活动碳源,测算了陕西省1990—2012年的农资碳排放量,并运用Tapio脱钩模型对陕西省农资活动碳排放与农业经济发展间的脱钩关系进行了分析。结果表明:2012年陕西省农资活动碳排放总量和碳排放强度分别为251.85万t和879.29kg/hm2,分别比1990年年均增长9.74%和13.07%;在空间上,农资碳排放总量区域差异明显,呈现陕南>陕北>关中的特征,碳排放强度则呈现关中>陕南>陕北的特征;农资碳排放总量与农业经济发展间主要呈现扩张负脱钩关系,各区域脱钩特征为:陕北以强、弱脱钩为主,关中以负、弱脱钩为主,陕南表现弱脱钩现象,且弱锐钩趋势逐渐增强。

Based on 6 categories of major carbon sources including chemical fertilizer, pesticide, agricultural film, plowing, sowing and the total power of agricultural machinery, the carbon emissions of agricultural investment activities in Shaanxi province from 1990 to 2012 were calculated, and its relation with economic development was analyze by using Tapio decoupling elastic model. Results showed that carbon emissions and carbon emission intensity of agricultural investment activities of Shaanxi province in 2012 were 2. 518 5 million tons and 879.29 kg/hm2 with the average annual growth rates of 9.7% and 13.07% over 1990, respectively. In spatial, the regional difference was distinct and the carbon emissions of the agricultural investment activities performed that southern Shaanxi province ~ northern Shaanxi province ~ central Shaanxi province, whereas, the carbon emission intensity of the agricultural investment activities showed the characteristic of central Shaanxi province 〉 southern Shaanxi province 〉 northern Shaanxi province. It appeared negative decoupling relationship between the overall carbon emissions of agricultural investment activities and the economic development of agriculture. It was strong decoupling or weak decoupling in northern Shaanxi province, and mainly negative decoupling and weak decoupling in central Shaanxi province, and weak decoupling in southern Shaanxi province with a increasing trend of weak decoupling.