Comparison of a laser methane detector with the GreenFeed and two breath analysers for on-farm measurements of methane emissions from dairy cows

Sorg, Diana; Difford, Gareth Frank; Mühlbach, Sarah; Kuhla, Björn; Swalve, Hermann H.; Lassen, Jan; Strabel, T.; Pszczoła, Marcin

doi:10.1016/j.compag.2018.08.024

Cited by 33 publications

(72 citation statements)

References 40 publications

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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%

“…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.…”

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confidence: 99%

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Reduction of Enteric Methane Emission in a Commercial Dairy Farm by a Novel Feed Supplement

Vrancken¹,

Suenkel²,

Hargreaves³

et al. 2019

OJAS

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Several in vitro fermentation studies had demonstrated the efficacy of Mootral, a patent-pending natural feed supplement, in reducing methane gas production. In order to test the supplement's application in a commercial farm, Jersey (n = 121) and Holstein-Friesian (HF, n = 275) lactating cows received 500 g of pellets containing 3% Mootral powder for 12 weeks. Their enteric methane gas production was monitored using a hand-held laser methane detector. During 7 weeks of pre-Mootral supplementation period, dry matter intake (DMI), milk yield and milk quality (fat, protein, urea, pH, bulk tank somatic cell count (BTSCC)) were monitored for both herds and continued during 12 weeks of Mootral supplementation (Mootral period), and 4 weeks after withdrawal of Mootral (post-Mootral period). Feed samples were analysed during each period, and feed efficiencies (FE) for each herd were calculated. Compared to the baseline, the methane gas produced by the Jersey and HF cows during the Mootral period were lower by 38.3% and 20.7% (p < 0.05), respectively. DMI for Jerseys were greatest during the pre-Mootral period (p < 0.05), while no difference was recorded for the HF cows. Milk yield increased significantly (p < 0.05) for both herds during Mootral supplementation. FE increased significantly for the Jersey herd during the Mootral and post-Mootral periods (p < 0.05). Statistically significant changes were detected for urea in both herds, and BTSCC for HF cows, but these did not adversely affect milk quality. Results demonstrated Mootral reduces enteric methane production in lactating cows while increasing milk yield without affecting milk quality.

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Section: Enteric Methane Emissionsmentioning

confidence: 95%

mentioning

confidence: 99%

Reduction of Enteric Methane Emission in a Commercial Dairy Farm by a Novel Feed Supplement

Vrancken¹,

Suenkel²,

Hargreaves³

et al. 2019

OJAS

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“…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%

Accuracy of methane emissions predicted from milk mid-infrared spectra and measured by laser methane detectors in Brown Swiss dairy cows

Denninger

Schwarm

Dohme‐Meier

et al. 2020

Journal of Dairy Science

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Characteristics of low methane emitting cows as categorized by midinfrared spectra and respiration chamber measurements. Denninger et al. Mid-infrared spectra (MIR) were used to identify low and high methane emitting dairy cows within the Swiss, Brown Swiss population. Thirty individuals were selected for methane measurements using respiration chambers and laser methane detectors. The MIR predictions were fairly persistent across different environments and differently developed equations. However, correlations with methane measurements were too weak to use MIR as a tool to select low emitting cows. Cows categorized as low emitters by respiration chamber data expressed distinct characteristics in digestion and efficiency.

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“…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%

Repeatability and Reproducibility of Measures of Bovine Methane Emissions Recorded using a Laser Detector

Niero

Cendron

Penasa

et al. 2020

Animals

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Methane (CH4) emissions represent a worldwide problem due to their direct involvement in atmospheric warming and climate change. Ruminants are among the major players in the global scenario of CH4 emissions, and CH4 emissions are a problem for feed efficiency since enteric CH4 is eructed to the detriment of milk and meat production. The collection of CH4 phenotypes at the population level is still hampered by costly and time-demanding techniques. In the present study, a laser methane detector was used to assess repeatability and reproducibility of CH4 phenotypes, including mean and aggregate of CH4 records, slope of the linear equation modelling the aggregate function, and mean and number of CH4 peak records. Five repeated measurements were performed in a commercial farm on three Simmental heifers, and the same protocol was repeated over a period of three days. Methane emission phenotypes expressed as parts per million per linear meter (ppm × m) were not normally distributed and, thus, they were log-transformed to reach normality. Repeatability and reproducibility were calculated as the relative standard deviation of five measurements within the same day and 15 measurements across three days, respectively. All phenotypes showed higher repeatability and reproducibility for log-transformed data compared with data expressed as ppm × m. The linear equation modelling the aggregate function highlighted a very high coefficient of determination (≥0.99), which suggests that daily CH4 emissions might be derived using this approach. The number of CH4 peaks resulted as particularly diverse across animals and therefore it is a potential candidate to discriminate between high and low emitting animals. Results of this study suggest that laser methane detector is a promising tool to measure bovine CH4 emissions in field conditions.

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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

Cited by 33 publications

References 40 publications

Reduction of Enteric Methane Emission in a Commercial Dairy Farm by a Novel Feed Supplement

Reduction of Enteric Methane Emission in a Commercial Dairy Farm by a Novel Feed Supplement

Accuracy of methane emissions predicted from milk mid-infrared spectra and measured by laser methane detectors in Brown Swiss dairy cows

Repeatability and Reproducibility of Measures of Bovine Methane Emissions Recorded using a Laser Detector

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