CH4, CO2 and N2O emissions from grasslands and bovine excreta in two intensive tropical dairy production systems

Rivera, Julián; Chará, Julián; Barahona, Rolando

doi:10.1007/s10457-018-0187-9

Cited by 23 publications

(21 citation statements)

References 48 publications

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“…There are several reports on the nutritional and productivity benefits of including L. leucocephala in the diet of grazing beef and dairy cattle (51)(52)(53)(54)(55). However, the current study is the first to report the benefits of including L. diversifolia in the diet of grazing cattle in Latin America.…”

Section: Nutrient Intake and Digestibilitymentioning

confidence: 77%

Nutritional Quality, Voluntary Intake and Enteric Methane Emissions of Diets Based on Novel Cayman Grass and Its Associations With Two Leucaena Shrub Legumes

Gaviria

Bolívar

Rosenstock³

et al. 2020

Front. Vet. Sci.

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Methane (CH 4 ) emissions from enteric fermentation in cattle are an important source of greenhouse gases, accounting for about 40% of all agricultural emissions. Diet quality plays a fundamental role in determining the magnitude of CH 4 emissions. Specifically, the inclusion of feeds with high digestibility and nutritional value have been reported to be a viable option for reducing CH 4 emissions and, simultaneously, increase animal productivity. The present study aimed to evaluate the effect of the nutritional composition and voluntary intake of diets based on tropical forages upon CH 4 emissions from zebu steers. Five treatments (diets) were evaluated: Cay1: Urochloa hybrid cv. Cayman (harvested after 65 days of regrowth: low quality); Cay2: cv. Cayman harvested after 45 days of regrowth; CayLl: cv. Cayman + Leucaena leucocephala; CayLd: cv. Cayman + Leucaena diversifolia; Hay: Dichantium aristatum hay as a comparator of common naturalized pasture. For each diet representing different levels of intensification (naturalized pasture, improved pasture, and silvopastoral systems), CH 4 emissions were measured using the polytunnel technique with four zebu steers housed in individual chambers. The CH 4 accumulated was monitored using an infrared multigas analyzer, and the voluntary forage intake of each animal was calculated. Dry matter intake (DMI, % of body weight) ranged between 0.77 and 2.94 among diets offered. Emissions of CH 4 per kg of DMI were significantly higher (P < 0.0001) in Cay1 (60.4 g), compared to other treatments. Diets that included Leucaena forage legumes had generally higher crude protein contents and higher DMI. Cay1 and Hay which had low protein content and digestibility had a higher CH 4 emission intensity (per unit live weight gain) compared to Cay2, CayLl and CayLd. Our results suggest that grass consumed after a regrowth period of 45 days results in lower CH 4 emissions intensities compared to those observed following a regrowth period of 65 days. Diets with Leucaena inclusion showed Gaviria-Uribe et al.Methane From Cattle Tropical-Forages advantages in nutrient intake that are reflected in greater live weight gains of cattle. Consequently, the intensity of the emissions generated in the legume-based systems were lower suggesting that they are a good option for achieving the emission reduction goals of sustainable tropical cattle production.

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Section: Nutrient Intake and Digestibilitymentioning

confidence: 77%

Nutritional Quality, Voluntary Intake and Enteric Methane Emissions of Diets Based on Novel Cayman Grass and Its Associations With Two Leucaena Shrub Legumes

Gaviria

Bolívar

Rosenstock³

et al. 2020

Front. Vet. Sci.

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“…The peak N 2 O emissions observed at the Casanare site (3,745 µg N 2 O-N m −2 h −1 ) (Figure 1A) were lower than those reported by Byrnes et al (2017) (25,000 µg N 2 O-N m −2 h −1 ) under similar tropical conditions. Rivera et al (2019a) reported a higher peak N 2 O emissions value (9,450 µg N 2 O-N m −2 h −1 ) for intensively managed pastures that received external N inputs through chemical fertilization in the Andean region of Colombia. According to Anger et al (2003), the activity of nitrifying and denitrifying microorganisms is much greater in soils with high N inputs compared to those where N availability is low; the latter was the case in the regions evaluated in the present study where the pastures did not receive N fertilizers prior the study.…”

Section: N 2 O Fluxes Emissionsmentioning

confidence: 98%

“…The loss of N from urine patches as NH 3 or N 2 O depends on the pasture type, which influences N uptake, the urine composition, especially the amounts of excreted N (Voglmeier et al, 2018), which depends on efficiencies in the use of dietary N (Lessa et al, 2014;Rivera et al, 2019a). Part of the dietary N is retained in milk and other part is excreted in urine and dung.…”

Section: Introductionmentioning

confidence: 99%

Apparent Nitrogen Recovery in Milk and Early Dry Season Nitrous Oxide Emission Factors for Urine Deposited by Dual-Purpose Cattle on Different Soil Types

Durango

Barahona

Bolívar

et al. 2021

Front. Sustain. Food Syst.

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Pasture conditions influence the nutrients use efficiency and nitrogen (N) losses from deposited excreta. Part of the N is lost as nitrous oxide (N2O), a potent greenhouse gas. The objective of this study was to characterize apparent N recovery in milk of dual-purpose cattle and to quantify N2O emissions from the urine they deposit following grazing on Megathyrsus maximus cv. Mombasa. The N content in the grass and the milk produced by the cattle and the milk urea N (MUN) content were quantified in two contrasting regions of Colombia (Casanare and Atlántico). Dry matter intake (DMI) by the cattle was estimated using the Cornell Net Carbohydrate and Protein System. We used a closed static chamber technique to measure N2O emissions from soils in areas with and without urine patches (21 days in Atlántico and 35 Days in Casanare). Estimated DMI values were 11.5 and 11.6 kg DM day−1, milk production was 6.5 and 5.9 L day−1, apparent N recovery in milk was 24 and 23%, and the MUN content was 4.4 and 17.2 mg N dl−1 in Casanare and Atlántico, respectively. N applied to soil in the form of urine corresponded at rates of 20 and 64 g N m−2 and net cumulative N2O emissions were 350 and 20 mg N2O-N m−2 in Casanare and Atlántico, respectively. Despite low digestibility of offered diet, N recovery in milk was above the values reported at dairy cattle in tropical conditions. High urine-N inputs at Atlántico site did not result in high N2O emissions suggesting that the default Tier 1 emission factor (EF) which is based on N inputs would have overestimated urine-based N2O emissions in Atlántico. Comparing previous studies conducted in Colombia, we observed inter-regional differences by urine-based N2O emissions. This observation suggests that to increase certainty in estimating urine-based N2O emissions, Colombia needs to move toward more region-specific Tier 2 EF and reduce its dependence on the default IPCC Tier 1 EF. In addition, the adoption of Tier 2 EF in the cattle sector will facilitate accounting for the effect of animal diets on N2O inventories.

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“…Recent studies have shown that silvopastoral systems have reduced CO 2 emissions compared with pasture monocultures (Landholm et al, 2019;Rivera et al, 2019). Singh et al (2020) found that cattle grazing grass-dominated cover crops reduced CO 2 efflux compared with grazing legume-dominated cover crops, and overall, grazing compared with nongrazing did not affect cumulative CO 2 emissions.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have shown that silvopastoral systems have reduced CO 2 emissions compared with pasture monocultures (Landholm et al., 2019; Rivera et al., 2019). Singh et al.…”

Section: Introductionmentioning

confidence: 99%

Soil CO₂ evolution is driven by forage species, soil moisture, grazing pressure, poultry litter fertilization, and seasonality in silvopastures

Adams

Ashworth

Sauer

2021

Agrosystems Geosci & Env

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Carbon cycling is a highly complex yet critical process, especially in silvopastures, which have multiple pools with the ability to store large amounts of C. However, it is largely unknown how site-specific variables, including edaphic factors, vegetation type, topography, and management, affect soil CO 2 flux in silvopastures. Therefore, this study aimed to evaluate CO 2 fluxes in a silvopastoral system as affected by soil moisture (udic and aquic), forage species (C 4 ; native grass mix and orchardgrass [C 3 ; Dactylis glomerata L.]), fertilization (poultry litter and a control), and grazing pressure (grazed and ungrazed). Temperature and volumetric water content (VWC) were measured simultaneous with flux measurements during summer grazing in 2018 and 2019. Averaged across years, fluxes were at least 20% greater (P ≤ .05) in the native mix fertilized with poultry litter than in the unfertilized native mix and fertilized or unfertilized orchardgrass, likely owing to increased microbial diversity activity in the rhizosphere of poultry litter-amended native grass species. Across years, CO 2 flux was 7% greater (P ≤ .05) in the fertilized ungrazed areas and 7% lower (P ≤ .05) in the unfertilized ungrazed areas, respectively, compared with both fertilized grazed and unfertilized grazed areas. Carbon dioxide flux was correlated (P ≤ .05) with sampling date, soil temperature, and VWC. Study results improve the understanding of C dynamics in complex silvopasture systems and may assist producers in their selection of forage species and nutrient sources when designing silvopastoral systems for enhanced regional sustainability.

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CH4, CO2 and N2O emissions from grasslands and bovine excreta in two intensive tropical dairy production systems

Cited by 23 publications

References 48 publications

Nutritional Quality, Voluntary Intake and Enteric Methane Emissions of Diets Based on Novel Cayman Grass and Its Associations With Two Leucaena Shrub Legumes

Nutritional Quality, Voluntary Intake and Enteric Methane Emissions of Diets Based on Novel Cayman Grass and Its Associations With Two Leucaena Shrub Legumes

Apparent Nitrogen Recovery in Milk and Early Dry Season Nitrous Oxide Emission Factors for Urine Deposited by Dual-Purpose Cattle on Different Soil Types

Soil CO₂ evolution is driven by forage species, soil moisture, grazing pressure, poultry litter fertilization, and seasonality in silvopastures

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CH4, CO2 and N2O emissions from grasslands and bovine excreta in two intensive tropical dairy production systems

Cited by 23 publications

References 48 publications

Nutritional Quality, Voluntary Intake and Enteric Methane Emissions of Diets Based on Novel Cayman Grass and Its Associations With Two Leucaena Shrub Legumes

Nutritional Quality, Voluntary Intake and Enteric Methane Emissions of Diets Based on Novel Cayman Grass and Its Associations With Two Leucaena Shrub Legumes

Apparent Nitrogen Recovery in Milk and Early Dry Season Nitrous Oxide Emission Factors for Urine Deposited by Dual-Purpose Cattle on Different Soil Types

Soil CO2 evolution is driven by forage species, soil moisture, grazing pressure, poultry litter fertilization, and seasonality in silvopastures

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Soil CO₂ evolution is driven by forage species, soil moisture, grazing pressure, poultry litter fertilization, and seasonality in silvopastures