Effects of increasing concentrations of wet distillers grains with solubles in steam-flaked, corn-based diets on energy metabolism, carbon-nitrogen balance, and methane emissions of cattle1

Hales, Kristin E; Cole, N. A.; MacDonald, James C.

doi:10.2527/jas.2012-5418

Cited by 53 publications

(65 citation statements)

References 25 publications

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“…McGinn et al (2008) found Y m values of 4.5% (sorghum‐based diet) and 5.1% (barley‐based diet) at feedlots in Australia and Canada, respectively. Hales et al (2013) found that Y m increased linearly from 2.4 to 3.7% as the fraction of corn WDGS in SFC‐based diets increased. In another study, Hales et al (2012) reported that a dry‐rolled corn diet yielded a greater Y m (3.04%) compared with a SFC diet (2.47%).…”

mentioning

confidence: 97%

Methane Emissions from a Beef Cattle Feedyard during Winter and Summer on the Southern High Plains of Texas

Todd

Altman²,

Cole

et al. 2014

J. Environ. Qual.

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Methane (CH) emissions from enteric fermentation by livestock account for about 2.1% of U.S. greenhouse gas emissions, with beef and dairy cattle being the most significant sources. A better understanding of CH emissions from beef cattle feedyards can help build more accurate emission inventories, improve predictive models, and meet potential regulatory requirements. Our objective was to quantify CH emissions during winter and summer at a typical beef cattle feedyard on the southern High Plains in Texas. Methane emissions were quantified over 32 d in winter and 44 d in summer using open-path lasers and inverse dispersion analysis. Methane per capita emission rate (PCER) ranged from 71 to 118 g animal d in winter and from 70 to 130 g animal d in summer. Mean CH PCER was similar in January, February, and May (average, 85.0 ± 0.95 g animal d) and increased to 93.4 g animal d during the June-July period. This increase coincided with increased dietary fiber. Methane loss ranged from 9.2 to 11.4 g CH kg dry matter intake, with lower values during winter. Gross energy intake (GEI) ranged from 135.2 to 164.5 MJ animal d, and CH energy loss ranged from 4.5 to 4.9 MJ animal d. Fraction of GEI lost as CH (Y) averaged 2.8% in winter, 3.2% in summer, and 3.0% overall. These values confirm the Y value currently recommended by the Intergovernmental Panel on Climate Change for Tier 2 estimates of enteric CH from feedlot fed cattle.

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mentioning

confidence: 97%

Methane Emissions from a Beef Cattle Feedyard during Winter and Summer on the Southern High Plains of Texas

Todd

Altman²,

Cole

et al. 2014

J. Environ. Qual.

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“…To investigate the consistency of these estimates, the F CO2 from cattle was also estimated based on the metabolizable energy using the approach suggested by Madsen et al (2010), which has animal and feed characteristics as input variables (Table 1 in Madsen et al, 2010). The F CO2 estimate provided by this model was 6.9 kg animal −1 d −1 , assuming metabolizable energy of 112 MJ d −1 , cattle gain weight of 1.3 kg d −1 , and that the cattle weight gain corresponds to 30 MJ (Hales et al, 2013). The average values of F CO2 were 8.9 ± 0.2 kg animal −1 d −1 from August to October 2013 and 8.1 ± 0.2 kg animal −1 d −1 from November 2013 to May 2014 (Fig.…”

Section: Resultsmentioning

confidence: 99%

Estimating Herd‐Scale Methane Emissions from Cattle in a Feedlot Using Eddy Covariance Measurements and the Carbon Dioxide Tracer Method

Prajapati

Santos

2019

J of Env Quality

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Measurements of methane (CH4) emissions from ruminants could provide invaluable data to reduce uncertainties in the global CH4 budget and to evaluate mitigation strategies to lower greenhouse gas emissions. The main objective of this study was to evaluate a new CO2 tracer (CO2T) approach that combined CH4 and CO2 atmospheric concentrations with eddy covariance (EC) CO2 flux measurements to estimate CH4 emissions from cattle in a feedlot. A closed‐path EC system was used to measure CH4 and CO2 fluxes from a feedlot in Kansas. The EC flux measurements were scaled from landscape to animal scale using footprint analyses. Emissions of CH4 from the cattle were also estimated using the CO2T approach and measured CO2 and CH4 concentration, and scaled EC CO2 fluxes. The CH4 and CO2 concentration ratios showed a distinct diel trend with greater values during the daytime. Average monthly CH4 emission estimates using the CO2T approach ranged from 72 to 127 g animal−1 d−1, which was consistent with the values reported in other studies that had similar animal characteristics. The CO2T method CH4 emission estimates showed good agreement with scaled CH4 EC fluxes (slope = 0.9 and R2 = 0.8) for cold and dry months. However, the agreement between the two techniques was significantly reduced (slope = 1.5 and R2 = 0.6) during wet and warm months. On average, the CO2T method CH4 emission estimates were 3% greater than the EC CH4 emissions. Overall, our results suggest that the CO2T method can be used to estimate enteric feedlot CH4 emissions. Core Ideas The CO2 tracer method (CO2T) was used to estimate enteric CH4 emissions in a feedlot. The CO2T method estimates were in good agreement with eddy covariance (EC) measurements. The agreement between CO2T and EC method was reduced during the wet and warm months.

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“…The importance of cattle diet on N excretion was recently reviewed by Waldrip et al (2015a). Hales et al (2013) reported that inclusion of 45% WDGS in cattle diets increased total N excretion by 47%. Both total N intake and diet composition are important considerations when assessing the N sustainability of cattle operations.…”

Section: Increasing Cattle Productivity and Reducing Dietary Protein mentioning

confidence: 99%

Nitrous Oxide Emissions from Open‐Lot Cattle Feedyards: A Review

et al. 2016

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Nitrous oxide (N 2 O) emissions from concentrated animal feeding operations, including cattle feedyards, have become an important research topic. However, there are limitations to current measurement techniques, uncertainty in the magnitude of feedyard N 2 O fluxes, and a lack of effective mitigation methods. The objective of this review was to assess N 2 O emission from cattle feedyards, including comparison of measured and modeled emission rates, discussion of measurement methods, and evaluation of mitigation options. ). This variation was due to inconsistency in measurement techniques as well as irregularity in N 2 O production and emission attributable to management, animal diet, and environmental conditions. Based on this review, it is clear that the magnitude and dynamics of N 2 O emissions from open-lot cattle systems are not well understood. Further research is required to quantify feedyard N 2 O fluxes and develop costeffective mitigation methods.

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Effects of increasing concentrations of wet distillers grains with solubles in steam-flaked, corn-based diets on energy metabolism, carbon-nitrogen balance, and methane emissions of cattle1

Cited by 53 publications

References 25 publications

Methane Emissions from a Beef Cattle Feedyard during Winter and Summer on the Southern High Plains of Texas

Methane Emissions from a Beef Cattle Feedyard during Winter and Summer on the Southern High Plains of Texas

Estimating Herd‐Scale Methane Emissions from Cattle in a Feedlot Using Eddy Covariance Measurements and the Carbon Dioxide Tracer Method

Nitrous Oxide Emissions from Open‐Lot Cattle Feedyards: A Review

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