甘肃省农牧交错区典型样带家畜生产系统碳平衡  

Carbon Balance of Typical Transected Livestock Production System in Agro-pastoral Area of Gansu Province

作　　者：王国鸿 李薇 燕振刚[1] WANG Guohong;LI Wei;YAN Zhengang(College of Information Science and Technology,Gansu Agricultural University,Lanzhou 730070,China;College of Finance and Economics,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学信息科学技术学院,兰州730070 [2]甘肃农业大学财经学院,兰州730070

出　　处：《西南大学学报（自然科学版）》2024年第10期177-187,共11页Journal of Southwest University(Natural Science Edition)

基　　金：甘肃省重点研发计划项目(21YF5FA095);甘肃省高等学校创新基金项目(2021A-057);甘肃省财政厅项目(GSCZZ-20160909-03);国家自然科学基金项目(31660347)。

摘　　要：评估甘肃省农牧交错区典型样带的家畜碳平衡,以猪、牛、羊为研究对象,通过将家畜按月龄分为4个阶段,运用生命周期法,评估1991-2020年家畜碳排放规律和2016-2020年农牧交错区不同地区相同月龄的家畜生产系统的碳排放、碳吸收和碳平衡值,单因素方差分析不同区域家畜的碳平衡差异性.结果表明:(1)近30年碌曲县家畜的碳排放要远高于安定区和临夏县.(2)近5年来碌曲县7-12月龄家畜的平均碳排放量为1.0209×10^(5)kg/t,占碳排放总量的18.45%;安定区为5.273×10^(4)kg/t,占9.52%;临夏县为4.135×10^(4)kg/t,占7.5%.碌曲县家畜碳排放年均增长率为2.02%,临夏县为6.7%,安定区为20.57%.(3)7-18月龄家畜碳平衡值表明,碌曲县的碳源作用显著强于安定区与临夏县(p<0.05),而安定区的碳源作用与临夏县差异无统计学意义(p>0.05).综合对比碌曲县、临夏县和安定区家畜碳平衡值,得出家畜碳源能力随着海拔的升高而显著增强;7-18月龄的家畜是碳排放量贡献最大者,占家畜碳排放总量的75.6%.The carbon balance of livestock in typical transects in agro-pastoral areas in Gansu Province was assessed.Taking pigs,cattle and sheep as the research subjects,by dividing livestock into 4 stages of age in month according to their ages in months,the life cycle method was used to evaluate the carbon emissions,carbon absorption and carbon balance values of livestock production systems of the same month age in 1991-2020 and in different areas of the agro-pastoral staggered area in2016-2020,and the carbon balance differences of livestock in different regions were analyzed by one-way variance.The results show that:①In the past 30 years,the carbon emissions of livestock in Luqu County were much higher than those in Anding District and Linxia County.②In the past five years,the average carbon emissions of 7-12 months old livestock in Luqu County,Anding District and Linxia County were 1.0209×10^(5)kg/t,5.273×10^(4)kg/t and 4.135×10^(4)kg/t,accounting for 18.45%,9.52%and 7.5%of the total carbon emissions,respectively.The average annual growth rate of livestock carbon emissions in Luqu County,Linxia County and Anding District was 2.02%,6.7%and 20.57%,respectively.③The carbon balance values of livestock aged 7-18 months showed that the carbon source effect in Luqu County was significantly stronger than that in Anding District and Linxia County(p<0.05),while the difference in carbon source effect between Anding District and Linxia County was not statistically significant(p>0.05).Comprehensively comparing the carbon balance values of livestock in Luqu County,Linxia County and Anding District,it is concluded that the carbon source capacity of livestock increases significantly with the increase of altitude.Livestock aged 7-18 months are the largest contributor to carbon emissions,accounting for 75.6%of total carbon emissions.

关 键 词：农牧交错区 家畜生产 碳平衡 生命周期法 

分 类 号：X324[环境科学与工程—环境工程] S82[农业科学—畜牧学]