该研究运用生命周期评价方法对规模化生猪农场系统的生猪养殖、粪污处理和水稻种植等过程的碳氮足迹进行特征分析(基准情景S0),并对比了低蛋白 日粮(S1)、粪尿酸化(S2)、沼气利用(S3)、水稻侧深施肥(S4)、有机无机配施(S5)以及综合技术(S6)等减排措施对农场系统环境排放的影响.结果表明:规模化生猪农场系统碳足迹为332.9 kg CO2-eq·FU-1,氮足迹为4.55 kg Nr·FU-1.其中,粪便储存环节碳氮足迹的贡献最高,分别占29％和50％.各环节单项技术(S1～S5)应用能够减少碳排放6.44％～11.25％,氮排放6.51％～30.37％;低蛋白 日粮技术(S1)和粪尿酸化技术(S2)对农场系统碳、氮足迹的减排效果最佳,分别为11.25％和30.37％;综合技术(S6)能够实现系统碳氮足迹减排35.39％和51.66％.因此,生猪养殖场应重点关注饲料营养和粪尿管理过程,以减少农场系统碳氮排放,实现绿色发展.
Analysis of Carbon and Nitrogen Emission Characteristics and Reduction Potential of Industrial Pig Farms
In this study,the carbon and nitrogen footprints of pig farming,manure treatment and rice cultivation processes in a large-scale pig farm system were analysed for the characteristics using the life cy-cle assessment method(baseline scenario S0),and emission reduction measures such as low protein diets(S1),manure and urine acidification(S2),biogas utilization(S3),side-deep fertilization of rice(S4),or-ganic-inorganic application in combination(S5)and integrated technologies(S6)were compared to study their effects on environmental emissions of farm systems.The results showed that the carbon footprint of the industrial pig farm system was 332.9 kg CO2-eq·FU-1 and the nitrogen footprint was 4.55 kg Nr·FU-1.Among them,the manure storage segment had the highest contribution of carbon and nitrogen foot-prints,accounting for 29％and 50％,respectively.The application of individual technologies(S1 to S5)in each link was able to reduce carbon emissions by 6.44％to 11.25％and nitrogen emissions by 6.51％to 30.37％;the low protein diet technology(S1)and manure and urine acidification technology(S2)were the most effective in reducing the carbon and nitrogen footprints of the farm system,at 11.25％and 30.37％,respectively;the integrated technology(S6)was able to reduce the carbon and nitrogen footprint by 35.39％and 51.66％,respectively.In conclusion,pig farms should focus on feed nutrition and manure and urine management processes so as to reduce carbon and nitrogen emissions of the farm system and achieve green development.
carbon and nitrogen footprintlife cycle assessmentcarbon and nitrogen reductionsce-nario analysis
万方数据
维普
