Measurement of Methane and Carbon Dioxide Emissions from Ruminants Based on the NDIR Technique
DING Xue-zhi1, LONG Rui-jun2, 3*，MI Jian-dui4，GUO Xu-sheng4
1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China 2. International Centre for Tibetan Plateau Ecosystem Management, Lanzhou University, Lanzhou 730020, China 3. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China 4. School of Life Science, Lanzhou University, Lanzhou 730020, China
Abstract：Methane (CH4) production in the rumen represents a loss of energy for the host animal; in addition, methane eructated by ruminants may contribute to a greenhouse effect or global warming. The dinumal CH4 and carbon dioxide (CO2) emissions from sheep were continuously recorded using the flow-through chamber method. A type new type of non-disperse infrared (NDIR) gas sensors based on pulse IR source was introduced, and by using the high performance pyroelectric IR sensor with built in interference filter and the “single light and two wavelengths” technology, CH4 and CO2 measurement from ruminants was achieved. Animals were given dry oat hay as the basic diet and supplemented concentrate with the ratio of 7∶3. The results showed that the recovery was 96.7% and 96.2% for CH4 and CO2, respectively. Methane and carbon dioxide output from sheep respectively averaged 15.6 g per day and 184.7 g per day, equivalent to 6.8 and 71.1 kg per animal. Diurnal fluctuations in hourly rates of CH4 and CO2 production in hourly of methane increased during day light to reach a peak at or near sunset and then declined towards sunrise, and consideration was given to the dry matter intake of the animals used in these studies and its possible effects on CH4 production.
Key words：NDIR gas analyser;Ruminant;Methane;Carbon dioxide
丁学智1，龙瑞军2，3*，米见对4，郭旭升4 . 非分光红外(NDIR)技术测定反刍动物甲烷和二氧化碳研究 [J]. 光谱学与光谱分析, 2010, 30(06): 1503-1506.
DING Xue-zhi1, LONG Rui-jun2, 3*，MI Jian-dui4，GUO Xu-sheng4 . Measurement of Methane and Carbon Dioxide Emissions from Ruminants Based on the NDIR Technique . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(06): 1503-1506.
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