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畜禽养殖已经成为农业活动温室气体排放的主要来源之一,蛋鸡养殖的粪便管理过程是温室气体排放的重要环节,但研究较少。试验选择典型规模化蛋鸡养殖场为对象,研究清粪、运输、处理和利用四个阶段甲烷(CH_4)和二氧化碳(CO_2)排放量的差异,分析规模化蛋鸡养殖粪便管理过程碳足迹及其温室效应。结果显示:养殖规模为60万只的蛋鸡场粪便管理过程每天向大气排放的CH_4的量为(43 022.12±656.57)L,CO_2的量为(847 695.27±993.92)L,温室气体为(1 751 159±14 756.99)L CO_2-eq;平均每只蛋鸡排放(2.92±0.02)L CO_2-eq;每生产1 kg鸡蛋粪便管理过程的碳足迹为(0.135±0.001)kg CO_2-eq;蛋鸡粪便管理四个阶段的温室气体排放量差异显著(P<0.05),其相互关系为:利用阶段>处理阶段>清粪阶段>运输阶段。本研究能为规模化蛋鸡场粪便管理过程筛选温室气体减排技术和降低碳排放强度提供科学支撑。
Livestock and poultry farming has become one of the main sources of greenhouse gas emissions from agricultural activities. The excrement management process of hen farming is an important part of greenhouse gas emissions but less studied. In this study, we selected typical scale farms to study the differences of methane (CH 4) and carbon dioxide (CO 2) emissions in four stages of manure removal, transportation, treatment and utilization, and analyzed the carbon footprint of the manure management process in large-scale laying hens Its greenhouse effect. The results showed that the daily amount of CH_4 emitted to the atmosphere during the manure management of laying farms with 600,000 farms was (43 022.12 ± 656.57) L, the amount of CO 2 was (847 695.27 ± 993.92) L, and the amount of greenhouse gases was (1 751 159 ± 14 756.99) L CO 2 -eq; (2.92 ± 0.02) L CO 2 -eq per hen; (1) The carbon footprint of manure production per 1 kg egg was (0.135 ± 0.001) kg CO 2 -eq There was significant difference (P <0.05) in greenhouse gas emissions from chicken manure management in four phases, which were as follows: utilization stage> treatment stage> cleaning stage> transportation stage. This study can provide scientific support for screening GHG emission reduction technologies and reducing carbon emission intensity in the process of excrement management in large-scale laying hens.