舍饲绵羊甲烷和二氧化碳的日排放动态
Diurnal dynamics of methane and carbon dioxide released from indoor-fed sheep
查看参考文献20篇
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文摘
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运用密闭呼吸代谢箱系统,对3只舍饲绵羊24h（有间断）甲烷（CH_4）和二氧化碳（CO_2）日排放特征进行了研究。供试3只甘肃细毛羊体况相近（平均体重为（25±5）kg）,其基础日粮为燕麦干草和玉米精料,粗精比为6∶4。结果表明：供试绵羊CH_4和CO_2的平均排放量分别为11g/d和147g/d,CH_4排放的峰值分别出现在17：00和22：00左右,达0.4217g/h和0.8082g/h,直到0：00降至最小为0.2993g/h;之后趋于平稳,次日8：00左右再次达到排放高峰,排放量为0.6587 g/h。而CO_2在各个测定时间段内差异不显著（p〉0.05）。因此,舍饲条件下绵羊CH_4和CO_2排放量动态（g/m in）变化不同步。由此,推算出舍饲绵羊（25±5）kg年排放CH_4和CO_2总量分别约为4.38 kg和53.66 kg。 |
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其他语种文摘
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Diurnal dynamics of methane （CH_4 ） and carbon dioxide （CO_2）emissions were measured on three wether crossbred sheep （average weight （25 ±5） kg）. The animals were fed ground corn and hay （at a ratio of 6：4） in amounts that fulfilled their calculated requirements of metabolizable protein and energy. During measurements, each animal was maintained in a respiration chamber and methane and carbon dioxide outputs were recorded at regular intervals over 24 hours. The sheep were adapted to the chamber prior to measurements by being placed in the chamber for 3 -4 hours followed by an hour break continually over a one week period. During measurements, inside and outside chamber temperatures and inside chamber humidity were recorded every 5 minutes. Emission of methane and carbon dioxide averaged 11 g/d and 147g/d, equivalent to 4.38 kg/a and 53.66 kg/a respectively. Peak methane output occurred at 22：00 （0. 808 g/day）, while lowest output occurred at 0：00 （0. 299 g/h）. In contrast to methane output, the output of carbon dioxide concentration was relatively stable, which suggested that the dynamic output patterns of methane and carbon dioxide were not similar. |
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来源
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生态学报
,2008,28(2):877-882 【核心库】
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关键词
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舍饲绵羊
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甲烷
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二氧化碳
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呼吸代谢箱
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地址
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1.
甘肃农业大学草业学院, 甘肃, 兰州, 730070
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中国科学院西北高原生物研究所, 青海, 西宁, 810008
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兰州大学草地农业科技学院, 甘肃, 兰州, 730020
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语种
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中文 |
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文献类型
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简报 |
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ISSN
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1000-0933 |
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学科
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普通生物学;昆虫学 |
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基金
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国际原子能机构（IAEA）资助项目（126666/R0）
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国家自然科学基金
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文献收藏号
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CSCD:3225152
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