【作者】 高春雨； 邱建军； 李虎； 王亚静； 王立刚；

【Author】 GAO Chun-yu,QIU Jian-jun * ,LI Hu,WANG Ya-jing, WANG Li-gang (Institute of Agricultural Resources and Regional Planning, Chinese Academy Agricultural Science, Beijing 100081, China)

【机构】 中国农业科学院农业资源与农业区划研究所；

【摘要】 过量施肥是我国农业生产集约区农田管理中存在的普遍问题,实施测土配方施肥可有效地减少农田温室气体排放。该文在对桓台县7个乡镇217户小麦-玉米轮作系统种植户施肥量调查的基础上,运用IPCC排放因子法估算了桓台县小麦-玉米轮作系统由施肥引起的N2O的排放量,结合化肥生产企业耗能调查,估算了化肥生产温室气体排放,最后根据推荐的测土配方施肥量,估算了桓台县小麦-玉米轮作系统实施测土配方施肥的减排潜力。结果表明,2008年桓台县小麦-玉米轮作系统平均施肥量为:氮肥525.1kgN·hm-2、磷290.8kgK2O·hm-2、钾143.4kgP2O5·hm-2,施肥引起的温室气体排放总量9.13万tCO2,其中土壤排放2.73万吨CO2,占29.91%,肥料生产排放6.40万tCO2,占70.01%,肥料生产排放中氮肥排放量占91.46%。通过实施测土配方施肥,桓台县小麦-玉米轮作系统可减少温室气体排放2.31万tCO2,其中减少农田温室气体排放7028.15tCO2,减少化肥生产耗能1.61万tCO2,具备实施农田测土配方施肥减排碳贸易项目的基本条件。更多还原

【Abstract】 Excessive fertilization was common in agricultural intensive production area and greenhouse gas(GHG) emissions could be reduced effectively by implementing soil testing and fertilizer formulas. Based on the fertilization investigation from 217 farmers of 7 rural towns in Huantai county who cultivated wheat-corn rotation system, the N2O emissions was estimated from corn-wheat rotation system in Huantai county. Considering the consumption of the chemical fertilizer production and the recommended fertilizer amount, this paper estimated the mitigaton potential of the corn-wheat rotation system in Hunatai county by emission factor method. The results showed that the nitrogen fertilizer application rate of unit sown area for wheat-corn system reached 525.1 kg N·hm -2 , phosphorus fertilizer 290.8 kg N·hm -2 and potassium fertilizer 143.4 kg N·hm -2 . GHG emission from applying fertilizer was 91.8 thousand t CO2 in which 27.3 thousand t CO2 was from soil taking up 29.75 percent and 64.5 thousand t CO2 was from fertilizer production taking up 70.25 percent and the emission from nitrogen fertilizer took up 90.75 percent in fertilizer production. It can be reduced 22.6 thousand t CO2 by implementing soil testing and fertilizer formulas in which 7028 t CO2 was reduced form cropland and 15.5 thousand t CO2 was from fertilizer production. And it was feasible to carry out CDM(Clean Development Mechanism) project for mitigation by implementing soil testing and fertilizer formulas in wheat-corn system in Huantai county.更多还原