摘要
基于甘肃省庆阳市华池县五蛟镇197户农户调查数据,采用生命周期评价法定量核算冬小麦、马铃薯、饲用玉米和饲用高粱生产的碳足迹,探究“粮改饲”政策实施后,陇东黄土高原主要粮食作物和饲草种植生产对碳排放的影响。结果表明:饲用玉米、马铃薯、冬小麦和饲用高粱单位面积碳足迹分别为4816.34kg CO_(2)-eq/hm^(2)、2893.44kg CO_(2)-eq/hm^(2)、2188.33kg CO_(2)-eq/hm^(2)、1888.00kg CO_(2)-eq/hm^(2),冬小麦、饲用玉米、马铃薯和饲用高粱单位产量碳足迹分别为1.03kg CO_(2)-eq/kg、0.77kg CO_(2)-eq/kg、0.34kg CO_(2)-eq/kg、0.22kg CO_(2)-eq/kg。冬小麦、马铃薯和饲用高粱生产的最大碳排放来源是氮肥,贡献率分别占64.20%、55.05%和60.86%;农膜是饲用玉米的最大碳排放来源,贡献率占43.57%。建议推广种植饲用高粱,以发挥饲草的生态优势;推广精准施肥和可降解农膜,以减少农业生产的资源消耗与环境污染。
In order to explore the impact of planting and production of main grain crops and forage crops on carbon footprint in the Loess Plateau of eastern Gansu after the implementation of the“Grain for Feed”policy,the survey data of 197 households in Wujiao town,Huachi county,Qingyang city,Gansu province was collected,and the carbon footprint of winter wheat,potato,forage corn and forage sorghum production was quantitatively calculated by the using life cycle assessment method.The results showed that the carbon footprint per unit area of forage maize,potato,winter wheat and forage sorghum were 4816.34,2893.44,2188.33 and 1888.00 kg CO_(2)-eq/hm^(2),respectively.The carbon footprint per unit yield of winter wheat,forage maize,potato and forage sorghum were 1.03,0.77,0.34 and 0.22 kg CO_(2)-eq/kg.Nitrogen fertilizer was the largest source of carbon emission from the production of winter wheat,potato and forage sorghum,accounting for 64.20%,55.05%and 60.86%respectively.Plastic film was the largest carbon emission source of forage maize,accounting for 43.57%.It is suggested to promote forage planting such as forage sorghum and make full use of forage’s ecological advantages,promote precision fertilization and biodegradable film,and reduce the resource consumption and environmental pollution in agricultural production.
作者
周舒怡
杨潇
冯盼盼
于应文
沈禹颖
ZHOU Shu-yi;YANG Xiao;FENG Pan-pan;YU Ying-wen;SHEN Yu-ying(College of Pastoral Agriculture Science and Technology/State Key Laboratory of Grassland Agro-ecosystems,Lanzhou University,Lanzhou 730020,China)
出处
《中国草地学报》
CSCD
北大核心
2022年第6期11-17,共7页
Chinese Journal of Grassland
基金
财政部、农业农村部国家牧草产业技术体系(CARS-34)
甘肃省委组织部2019年重点人才项目。
关键词
生命周期评价法
农户行为
生产投入
农业碳排放
饲草生态效益
Life cycle assessment
Farmer behavior
Production input
Agricultural carbon emission
Ecological benefits of forage
