2018
DOI: 10.1016/j.compag.2018.08.024
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Comparison of a laser methane detector with the GreenFeed and two breath analysers for on-farm measurements of methane emissions from dairy cows

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Cited by 39 publications
(81 citation statements)
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“…However, the LMD measurements were taken in a sheltered area with no noticeable effect of wind movements. When compared with other methods of methane measurements, the LMD still ranked intensity of methane similarly [13]. weeks after Mootral supplementation stopped (Table 2).…”
Section: Enteric Methane Emissionsmentioning
confidence: 95%
See 1 more Smart Citation
“…However, the LMD measurements were taken in a sheltered area with no noticeable effect of wind movements. When compared with other methods of methane measurements, the LMD still ranked intensity of methane similarly [13]. weeks after Mootral supplementation stopped (Table 2).…”
Section: Enteric Methane Emissionsmentioning
confidence: 95%
“…The same schedule was applied to both Jersey and HF herds.Measurements were taken individually from 15 Jersey and 15 Holstein-Friesian cows as they returned from the milking parlour in the morning from approximately 06:15 hours. Measurements procedure was similar to the work of Sorg et al[13]. The cows were held in either a crush or artificial insemination stall and the handheld LMD was pointed at the cow's nostrils for 4 minutes at a distance of 1 m. LMD measurements were taken on Week 12 of the Mootral period with baseline measurements taken on week 16(Table 1) from the same cows as identified by their unique ear tag numbers.…”
mentioning
confidence: 99%
“…Two LMD units (Mini-Green Lmm-g; Tokyo Gas Engineering Solutions, Tokyo, Japan) were used. Measurement principle (tunable diode laser absorption spectroscopy) and operation of the devices was described in detail by Chagunda et al (2013) and Sorg et al (2018). The duration of single measurements was set to 6 min/cow, and the distance between the LMD device and the cow's nostril was set to 1 m. The measurements were conducted on each cow during the last 3 d of the 8-d sampling period, and this before and after each feeding event while the animals were standing.…”
Section: Estimation Of Daily Ch4 Emissions Using Laser Methane Detectorsmentioning
confidence: 99%
“…With respect to the need for individual animal data sets, the well-established techniques to measure CH4 from cows, respiration chambers (RC) and sulfur hexafluoride (SF6), are not fast and cheap enough. The laser CH4 detector (LMD) has been used to make measurements of CH4 concentrations in cow's breath over a short time period to estimate daily CH4 emissions, and it has been suggested it might be used to allow a quick ranking of animals by CH4 emission on farm (Chagunda et al, 2013;Sorg et al, 2018). Like RC, the LMD technique can be applied for all ruminant species and production purposes.…”
Section: Introductionmentioning
confidence: 99%
“…Laser methane detector (LMD) has been proposed as an alternative instrument to directly measure CH 4 emissions. The sensitivity and accuracy of LMD have been assessed in controlled conditions, by comparing data acquired through LMD with those measured through the respiration chamber (coefficient of determination, R 2 from 0.64 to 0.97) [9,10] and GreenFeed (R 2 = 0.64) [11]. However, it is still unclear if LMD may be appropriate in terms of repeatability and reproducibility to accurately measure CH 4 emissions in field conditions.…”
Section: Introductionmentioning
confidence: 99%