Methane emissions from sheep grazing pearl millet (Penissetum americanum (L.) Leeke) swards fertilized with increasing nitrogen levels

Amaral, Guilherme Pires; David, Diego Bitencourt de; Gere, José Ignacio; Savian, Jean Víctor; Kohmann, Marta M.; Nadin, Laura; Chopa, F. Sánchez; Bayer, Cimélio; Carvalho, P. C. F.

doi:10.1016/j.smallrumres.2016.07.011

Cited by 12 publications

(3 citation statements)

References 27 publications

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“…The literature reports average values for Ym of 5.4% of gross energy intake (GEI) for grazing sheep [45]. For growing lambs, Savian et al [46] reported an average value of 7.3% (grazing ryegrass), and Amaral et al [47] reported an average value of 5% (grazing pearl millet). The summary report of Congio et al [11] showed values from 4.4% to 11.6%, with a mean value of 7%.…”

Section: Discussionmentioning

confidence: 99%

Enteric Methane Emission from Sheep Fed with Rhodes Grass Hay (Chloris gayana) Alone or Supplemented with Dried Distillers’ Grains with Solubles

Gere

Frasson

Wawrzkiewicz

et al. 2022

Methane

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Livestock systems based on subtropical and tropical pastures are characterized by the low productivity of livestock due to the poor nutritional value of the forage (low nitrogen concentration and digestibility, and high fiber and lignin concentrations). These conditions lead to low productivity and, consequently, high absolute emissions of methane (CH4) per unit of product. Dry distilled grains with solubles (DDGS) are the main by-product resulting from ethanol production, and they are characterized by their high-energy fibrous and protein content, thus becoming an option for the supplementation of low-quality forage. This research investigated the effects of dietary DDGS inclusion on dry matter digestibility (DMD) and enteric CH4 emission. Eight adult sheep of 64 ± 8 kg live weight were used. The duration of the study was 54 days, divided into two periods (changeover design), which comprised a 17-day pre-experimental period and 10 days for experimental data collection. Animals were allocated to one of two treatments used: hay (H) as a control treatment, where animals were fed with Rhodes grass hay alone; and H + DDGS, where animals were fed with H supplemented with DDGS. CH4 emissions were estimated using the sulfur hexafluoride (SF6) tracer technique. Diets containing DDGS increased DMI by 22% (p < 0.05) and reduced daily CH4 emissions by 24% (g/d), the CH4 yield by 35% (g/kg DMI), and the average value of CH4 energy per gross energy intake (Ym) by 44%, compared to the control treatment (p < 0.05). The experiment demonstrated that supplementation with DDGS in low-quality roughage reduced daily CH4 emissions, yields, and Ym.

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Section: Discussionmentioning

confidence: 99%

Enteric Methane Emission from Sheep Fed with Rhodes Grass Hay (Chloris gayana) Alone or Supplemented with Dried Distillers’ Grains with Solubles

Gere

Frasson

Wawrzkiewicz

et al. 2022

Methane

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“…For example, Rira et al (2016) reported more abundant total ruminal bacteria and methanogens in animals kept in tropical environments than in temperate environments. Nevertheless, much lower CH 4 yields were reported from other studies with sheep (Amaral et al, 2016;Lima et al, 2019;Correâ et al, 2021;Fernandes et al, 2022). For example, the study of Amaral et al (2016) reported CH 4 yield of 13 g/kg DMI from sheep fed on high quality (N fertilized) C4 annual grasses.…”

Section: Effects Of Gin Infection and Breed On Daily Methane Emission...mentioning

confidence: 87%

“…Nevertheless, much lower CH 4 yields were reported from other studies with sheep (Amaral et al, 2016;Lima et al, 2019;Correâ et al, 2021;Fernandes et al, 2022). For example, the study of Amaral et al (2016) reported CH 4 yield of 13 g/kg DMI from sheep fed on high quality (N fertilized) C4 annual grasses. In the present study, the lambs were fed on a lowquality tropical grass with high fibre but low crude protein contents.…”

Section: Effects Of Gin Infection and Breed On Daily Methane Emission...mentioning

confidence: 87%

Impact of Haemonchus contortus infection on feed intake, digestion, liveweight gain, and enteric methane emission from Red Maasai and Dorper sheep

Mwangi¹,

Eckard²,

Gluecks³

et al. 2023

Front. Anim. Sci.

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A study was conducted with Red Maasai and Dorper lambs to evaluate the effects of infection with the gastrointestinal nematode (GIN) Haemonchus contortus on feed intake, liveweight gain (LWG), feed energy and nitrogen partitioning, and enteric methane (CH4) emissions. Six- to seven-month-old Red Maasai (n=12) and Dorper (n=12) lambs were randomly allocated to three treatments (n=8, four lambs per breed) in a 2×3 factorial cross-over study over two periods (P1 and P2) of 36 days each. The treatments consisted of three combinations of GIN infection and feeding level: Infected + ad libitum feeding (I-adlib), uninfected + ad libitum feeding (Un-adlib), and uninfected + restricted feeding (Un-restd), across the two breeds. Lambs in the I-adlib group were trickle-infected daily with 1,000 L3 stage larvae of H. contortus for four consecutive days (Days 1–4), whereas lambs in the other experimental treatments were kept GIN free. The feed intake was measured daily. Liveweight (LW), faecal egg counts (FEC), and packed cell volume (PCV) were measured on Day 1 and weekly thereafter. On Days 29–33 total faecal and urine outputs were determined in metabolic crates. The lambs were then housed in respiration chambers for three consecutive days (Days 34–36). There was a washout period of 21 days before P2 started. Uninfected lambs (Un-adlib and Un-restd) had undetectable FEC throughout the study. On Day 36, FEC did not differ between the breeds (P>0.05). Infected lambs (I-adlib) had lower PCV than uninfected (Un-adlib and Un-restd) lambs on day 36. Neither breed nor infection influenced feed and nutrient intake, but as expected, restricted-fed lambs had a lower intake (P<0.05). The LWG of Un-adlib lambs was significantly higher than that of I-adlib and Un-restd lambs (P<0.05), whereas there was no breed difference (P>0.05). Neither breed nor infection affected feed digestibility, nitrogen retention or energy metabolisability (P>0.05). However, feed restriction decreased feed intake, LWG and N retention, whereas feed digestibility and energy metabolisability were unaffected. Neither daily CH4 emissions nor yield (per unit of feed intake) were affected by experimental infection, but Un-restd lambs had lower CH4 emissions per day. Red Maasai lambs had consistently lower daily CH4 emissions and yields than Dorper (P<0.01). This study confirmed the relative resistance of indigenous sheep (Red Maasai) to H. contortus infection, but the increased CH4 emission and yield due to GIN observed in other studies was not confirmed. Further investigations are needed to test whether in environments with multiple stress factors, local or indigenous breeds or their crossbreeds with exotic breeds may be better equipped to sustain production and simultaneously have a reduced carbon footprint than purebred exotic breeds.

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Feed intake, methane yield, and efficiency of utilization of energy and nitrogen by sheep fed tropical grasses

Azevedo

Savian

Amaral³

et al. 2021

Trop Anim Health Prod

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Methane emissions from sheep grazing pearl millet (Penissetum americanum (L.) Leeke) swards fertilized with increasing nitrogen levels

Cited by 12 publications

References 27 publications

Enteric Methane Emission from Sheep Fed with Rhodes Grass Hay (Chloris gayana) Alone or Supplemented with Dried Distillers’ Grains with Solubles

Enteric Methane Emission from Sheep Fed with Rhodes Grass Hay (Chloris gayana) Alone or Supplemented with Dried Distillers’ Grains with Solubles

Impact of Haemonchus contortus infection on feed intake, digestion, liveweight gain, and enteric methane emission from Red Maasai and Dorper sheep

Feed intake, methane yield, and efficiency of utilization of energy and nitrogen by sheep fed tropical grasses

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