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文摘
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在全球气候变化背景下温室气体减排已成为当前研究热点之一。该研究通过研究含水率和C/N耦合对驴粪堆肥过程中的温室气体排放和全球增温潜势的影响,从中筛选出温室气体减排的含水率和C/N耦合模式,为实现堆肥过程中温室气体减排提供依据和参考。以驴粪堆肥为对象,采用静态箱-气相色谱法研究了不同C/N和含水率耦合,即W_1R_1(含水率:55%;C/N:25:1)、W_1R_2(含水率:55%;C/N:30:1)、W_1R_3(含水率:55%;C/N:35:1)、W_2R_1(含水率:60%; C/N:25:1)、W_2R_1(含水率:60%;C/N:30:1)、W_2R_3(含水率:60%;C/N:35:1)6种驴粪堆肥模式对温室气体排放和全球增温潜势的影响。结果表明,在堆肥过程中,堆温呈先升后降趋势,含氧量呈先降后升趋势,堆温和含氧量呈极显著负相关关系;低C/N、低含水率有利于堆温的升高。N_2O、CH_4、CO_2排放通量总体呈先升后降趋势,排放峰值分别出现在堆肥后24、8、16 d左右。6种堆肥模式下CH_4、CO_2排放通量与堆温呈极显著正相关,CH_4排放通量与含氧量呈极显著负相关。全球增温潜势大小顺序为W_2R_1>W_2R_3>W_1R_2>W_1R_1>W_2R_2>W_1R_3。各处理均以CO_2累积排放量对全球增温潜势贡献最大,达到66.30%以上,N_2O贡献为2.07%-32.45%,CH_4贡献低于1.54%。综合考虑堆温和全球增温效应,建议采用W_1R_3堆肥模式。 |
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其他语种文摘
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Greenhouse gas emission reduction has been one of the research hotspots under the context of global climate change. The effects of moisture content and C/N coupling mode on reducing greenhouse gas emission and global warming potential (GWP) were studied in this paper., so as to find the suitable moisture content and C/N coupling mode for reducing greenhouse gas emission, and provide the references or reasons for greenhouse gas emission reduction in manure composting. The six donkey manure composting treatments, such as W_1R_1(water content: 55%; C/N: 25:1), W_1R_2 (water content: 55%; C/N: 30:1), W_1R_3 (water content: 55%; C/N: 35:1), W_2R_1 (water content: 60%; C/N: 25:1), W_2R_1 (water content: 60%; C/N: 30:1) and W_2R_3 (water content: 60%; C/N: 35:1) were set to research greenhouse gas emissions and global warming potential by using the static chamber-gas chromatography. The results showed that the manure temperature increased in the early stage and decreased in the mid and later stage, but the opposite trend happened to the oxygen content, so the manure temperature and oxygen content showed a significantly negative correlationship. Lower C/N ratio and water content were conducive to the manure temperature increasing. The N_2O, CH_4, and CO_2 emission fluxes mainly increased in early period and decreased in mid and later stage, and the biggest emission fluxes of N_2O, CH_4, and CO_2 appeared around 24 d, 8 d and 16 d after manure composting, respectively. The CH_4 and CO_2 emission fluxes positively correlated with the manure temperature among the six composting modes, but the significantly negative relationship happened to CH_4 emission flux with the manure oxygen content. GWP decreased in sequence of W_2R_1>W_2R_3>W_1R_2>W_1R_1>W_2R_2>W_1R_3. The cumulative CO_2 emission amount of each treatment made the greatest contribution to GWP, the contribution proportion was more than 66.30%, N_2O contribution proportion varied from 2.07% to 32.45%, and CH_4contribution proportion was less than 1.54%. Considering the manure composting temperature and global warming effect, the W_1R_3 composting mode should be recommended. |
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来源
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生态环境学报
,2019,28(2):341-347 【核心库】
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DOI
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10.16258/j.cnki.1674-5906.2019.02.016
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关键词
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驴粪堆肥
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C/N
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含水率
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温室气体排放通量
;
全球增温潜势
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地址
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1.
聊城大学环境与规划学院, 山东, 聊城, 252059
2.
聊城大学农学院, 山东, 聊城, 252059
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1674-5906 |
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学科
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环境科学基础理论 |
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基金
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国家自然科学基金项目
;
山东省自然科学基金
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山东省高校科研计划项目
;
聊城大学科技发展计划资助项目
;
聊城大学大学生科技文化创新项目
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文献收藏号
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CSCD:6465273
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