德州市低碳农业发展潜力分析及对策

进入21世纪,农业节能减排逐渐引起人们的关注。运用能源碳排放计算模型,对德州市2003-2008年农业碳源、碳汇进行计算分析,结果表明:(1)目前德州市农业碳源现状为7.29TgCO2eq.a-1,其中由农业能源消费、土壤呼吸、化肥施用和牲畜饲养造成碳排放分别为2.81、2.12、0.93和1.43TgCO2eq.a-1;(2)农业碳汇现状能力为9.24TgCO2eq.a-1,包括由于土地利用变化造成的碳排放4.73TgCO2eq.a-1和通过施用有机肥和实施秸秆还田的固碳能力4.51TgCO2eq.a-1;(3)碳汇能力较碳源释碳量有所盈余,具有发展低碳农业的潜力。从减源、增汇两个方面提出德州市未来发展低碳农业的相关措施,如调整农业产业结构,改进土地利用方式、实行保护性耕作、提倡农村可再生能源利用、推广立体种养模式,发展种养结合的循环农业等。

Analysis on development potential of low-carbon agriculture in Dezhou and countermeasures

In the 21st century,the agricultural energy-saving and emission-reduction is gaining global attention.Taking Dezhou as a case,we use different calculation models of energy carbon emissions to evaluate the status of carbon sink and carbon source from 2003 to 2008.The results are as follows.(1)The current carbon emission capacity of agriculture in Dezhou is 7.29TgCO2eq.a-1,including the agricultural energy consumption carbon emissions 2.81TgCO2eq.a-1,contribution of soil respiration 2.12 TgCO2eq.a-1,chemical fertilizers 0.93 TgCO2eq.a-1,and the emissions caused by keeping livestock 1.43TgCO2eq.a-1.(2) The present status of agricultural carbon sinks capacity is 9.24 TgCO2eq.a-1,including the carbon emissions caused by land use change 4.73 TgCO2eq.a-1,and the final carbon sequestration capacity through the application of organic manure and implementing straw returning 4.51TgCO2eq.a-1.(3) The current capacity of carbon sink is more than emissions,which suggests that it will be easy to develop low-carbon agriculture in Dezhou in the near future.From two aspects of reducing source and increasing sink capacity,we build the future low-carbon agricultural development model of Dezhou and propose some measures,such as adjusting agricultural industrial structure and improving land use,implementing conservation tillage,advocating the model of stereoscopic plantation,and developing circular agriculture with planting and breeding.