| 张丽萍,孙国峰,盛 婧,陈留根,郑建初.养猪舍不同发酵床垫料碳素流向及二氧化碳与甲烷排放初探[J].农业环境科学学报,2014,33(6):1247-1253. |
| 养猪舍不同发酵床垫料碳素流向及二氧化碳与甲烷排放初探 |
| Emissions of Carbon Dioxide and Methane in Different Pig Biobeds |
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| DOI：10.11654/jaes.2014.06.028 |
| 中文关键词: 发酵床 物质流分析 碳素转化 二氧化碳排放 甲烷排放 |
| 英文关键词: biobed material flow analysis carbon transformation carbon dioxide emission methane emission |
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| 中文摘要: |
| 为了探明发酵床养猪过程碳素流向及二氧化碳与甲烷排放特征，分别选取3种不同原料的发酵床：稻壳+锯木屑（FD）、稻壳+菌糠（FJ）、稻壳+酒糟（FW）作为研究对象，通过垫料采集和静态箱法收集气体，对一个养殖周期内的碳素变化和二氧化碳、甲烷排放量进行测定。结果表明，一个养殖周期结束后，3种发酵床二氧化碳与甲烷的排放总量占碳素总损失的比例分别为41.21%（FJ）、54.12%（FD）、48.27%（FW），是碳素转化的主要形式。3种垫料的二氧化碳排放特点呈现一定的相似性，均在养殖前期与后期各出现1个排放高峰期，后期排放量大于前期；其二氧化碳排放总量具有显著性差异，FD在整个养殖周期内二氧化碳排放量最大，其次是FJ。FJ与FW的甲烷排放特点与二氧化碳相似，均在养殖前期与后期出现两个排放高峰期且排放量大小相近，而FD的甲烷排放集中在前期，后期仅有微弱回升；3种发酵床的甲烷排放总量同样具有显著性差异，一个饲养周期内FW的甲烷排放总量最大，其次是FJ。通过相关性分析发现，3种发酵床二氧化碳与甲烷的排放呈负相关关系，初步表明发酵床存在甲烷氧化成二氧化碳的生物途径。 |
| 英文摘要: |
| Biobed for pig raising is an eco-pig raising system with less wastes discharged into the environment. However, there is little information available about its impacts on greenhouse gas emission. In this study, we hypothesized that biobed materials with different compositions may have different effects on carbon dioxide and methane emissions. An experiment of multivariable completed block design with repeated measure and three replicates was conducted. Treatments consisted of three different bedding materials：rice husk+sawdust（FD）, rice husk+mushroom bran（FJ）, and rice husk+vinasse（FW）. Gases were sampled by static box method at different stages during one production cycle（150 days）. The total emissions of CO2 and CH4 accounted for 41.21%, 54.21% FD, and 48.27% of total carbon losses in FJ, FD, and FW, respectively. The pattern of CO2 emissions showed similarity among three bedding materials, which appeared emission peaks both at earlier and later stages of pig growth, with greater emissions at later than at earlier stage. The total amount of CO2 emitted was highest in FD, followed by FJ. The pattern of CH4 emission in FJ and FW was similar to that of CO2, but the amounts of CH4 emitted were similar at two peaks. However, the emission of CH4 in FD mainly concentrated at the earlier stage. The total amount of CH4 emission was largest in FW, followed by FJ. Correlation analysis showed that there was a negative correlation between CO2 and CH4 in the three biobeds, implying biological oxidation of CH4 into CO2. |
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