Effects of feeding unprocessed oilseeds on methane emission, nitrogen utilization efficiency and milk fatty acid profile of lactating dairy cows

Muñoz, Camila; Sánchez, Ramón Arias; Peralta, Alejandra María Teresa; Espíndola, Susana Mabel; Yan, Tianhai; Morales, Rogelio Alejandro Alonso; Ungerfeld, Emilio M.

doi:10.1016/j.anifeedsci.2019.01.015

Cited by 22 publications

(20 citation statements)

References 49 publications

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“…The oil supplementation to both low-and high-starch diets resulted in lower CH 4 production compared with non-supplemented diets (475 vs. 552 g/d, on average). This is in line with the findings of the experiments that used oilseeds [29,46,47], or fish oil [30] to supplement dairy cow diets. In the current experiment, enteric CH 4 emission (g/d) reduced by on average 4.7% for each 10 g/kg DM unsaturated oil in the diet.…”

Section: Methane Production and Rumen Fermentationsupporting

confidence: 90%

Effects of Starch Level and a Mixture of Sunflower and Fish Oils on Nutrient Intake and Digestibility, Rumen Fermentation, and Ruminal Methane Emissions in Dairy Cows

Darabighane

Tapio

Ventto

et al. 2021

Animals

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Four multiparous dairy cows were used in a 4 × 4 Latin square to examine how starch level and oil mixture impact dry matter (DM) intake and digestibility, milk yield and composition, rumen fermentation, ruminal methane (CH4) emissions, and microbial diversity. Experimental treatments comprised high (HS) or low (LS) levels of starch containing 0 or 30 g of a mixture of sunflower and fish oils (2:1 w/w) per kg diet DM (LSO and HSO, respectively). Intake of DM did not differ between cows fed LS and HS diets while oil supplementation reduced DM intake. Dietary treatments did not affect milk and energy corrected milk yields. There was a tendency to have a lower milk fat concentration due to HSO compared with other treatments. Both high starch level and oil supplementation increased digestibility of gross energy. Cows receiving HS diets had higher levels of total rumen VFA while acetate was lower than LS without any differences in rumen pH, or ruminal CH4 emissions. Although dietary oil supplementation had no impact on rumen fermentation, decreased CH4 emissions (g/day and g/kg milk) were observed with a concomitant increase in Anoplodinium-Diplodinium sp. and Epidinium sp. but a decrease in Christensenellaceae, Ruminococcus sp., Methanobrevibacter ruminantium and Mbb. gottschalkii clades.

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Section: Methane Production and Rumen Fermentationsupporting

confidence: 90%

Effects of Starch Level and a Mixture of Sunflower and Fish Oils on Nutrient Intake and Digestibility, Rumen Fermentation, and Ruminal Methane Emissions in Dairy Cows

Darabighane

Tapio

Ventto

et al. 2021

Animals

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“…These emissions contribute to environmental pollution mainly through the leaching to surface and ground water resources 53,54 . There are, however, contrasting results showing that with some oils the beneficial effect decreasing methane may be traded-off with an increased N excretion 55,56 .…”

Section: Discussionmentioning

confidence: 98%

Dietary supplemental plant oils reduce methanogenesis from anaerobic microbial fermentation in the rumen

Vargas

Andrés

López-Ferreras

et al. 2020

Sci Rep

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Ruminants contribute to the emissions of greenhouse gases, in particular methane, due to the microbial anaerobic fermentation of feed in the rumen. The rumen simulation technique was used to investigate the effects of the addition of different supplemental plant oils to a high concentrate diet on ruminal fermentation and microbial community composition. The control (CTR) diet was a high-concentrate total mixed ration with no supplemental oil. The other experimental diets were supplemented with olive (OLV), sunflower (SFL) or linseed (LNS) oils at 6%. Rumen digesta was used to inoculate the fermenters, and four fermentation units were used per treatment. Fermentation end-products, extent of feed degradation and composition of the microbial community (qPCR) in digesta were determined. Compared with the CTR diet, the addition of plant oils had no significant (P > 0.05) effect on ruminal pH, substrate degradation, total volatile fatty acids or microbial protein synthesis. Gas production from the fermentation of starch or cellulose were decreased by oil supplementation. Methane production was reduced by 21-28% (P < 0.001), propionate production was increased (P < 0.01), and butyrate and ammonia outputs and the acetate to propionate ratio were decreased (P < 0.001) with oilsupplemented diets. Addition of 6% OLV and LNS reduced (P < 0.05) copy numbers of total bacteria relative to the control. In conclusion, the supplementation of ruminant diets with plant oils, in particular from sunflower or linseed, causes some favorable effects on the fermentation processes. The addition of vegetable oils to ruminant mixed rations will reduce methane production increasing the formation of propionic acid without affecting the digestion of feed in the rumen. Adding vegetable fats to ruminant diets seems to be a suitable approach to decrease methane emissions, a relevant cleaner effect that may contribute to alleviate the environmental impact of ruminant production. Ruminant herbivory is characterized by foregut microbial anaerobic fermentation of structural carbohydrates from fibrous plant-based feedstuffs providing nutrients for the animal 1. Moreover, ruminal microbes break down all components of the diet, with characteristic pathways involved in the degradation of fiber and non-structural carbohydrates, proteins and lipids 2,3. Ruminal fermentation can be considered beneficial in many aspects, but has also impacts on the environment. One of the global environmental impacts of livestock agriculture is the release of greenhouse gases (GHG) into the atmosphere 4,5 , in particular methane, a gas responsible for 20% of the global warming produced by all GHG 6,7. It is estimated that raising farm animals accounts for about 16% of anthropogenic GHG emissions, with two-thirds of the total livestock GHG emissions produced by ruminants. Methane (CH 4

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“…The dried pasture samples (from herbage mass measurement) were milled through a 1 mm sieve and composited every 2 weeks, prior to chemical composition analysis. The chemical composition of feedstuffs was conducted as previously reported [10] by methods outlined by the AOAC International [15] and included ash, crude protein (CP), EE, starch (only in the concentrates), acid detergent fiber (ADF), neutral detergent fiber (NDF), and gross energy (GE) contents.…”

Section: Grazing and Feed Management And Measurementsmentioning

confidence: 99%

“…Dietary inclusion of oilseeds in dairy cow diets through its effects on rumen fermentation can also affect milk fatty acid composition [9,10], and there is interest in shifting saturated milk FA towards unsaturated, milk FA as these are perceived as healthier for human consumption [11].…”

Section: Introductionmentioning

confidence: 99%

“…There is a lack of studies that conduct direct comparisons between oilseeds on methane emissions [4,9]. Our previous study comparing different oilseeds sources available in southern Chile revealed that whole cottonseed was the most potent oilseed in decreasing CH 4 emissions [10], although in that study we had hypothesized that the more unsaturated lipid source (linseed) would have a greater effect mitigating CH 4 than cottonseed or rapeseed, as the effect of FA on methane mitigation appear largely dependent on their level of saturation [4,12].…”

Section: Introductionmentioning

confidence: 99%

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Long-Term and Carryover Effects of Supplementation with Whole Oilseeds on Methane Emission, Milk Production and Milk Fatty Acid Profile of Grazing Dairy Cows

Muñoz

Villalobos

Peralta

et al. 2021

Animals

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Research is ongoing to find nutritional methane (CH4) mitigation strategies with persistent effects that can be applied to grazing ruminants. Lipid addition to dairy cow diets has shown potential as means to decrease CH4 emissions. This study evaluated the effects of oilseeds on CH4 emission and production performance of grazing lactating dairy cows. Sixty Holstein Friesian cows grazing pasture were randomly allocated to 1 of 4 treatments (n = 15): supplemented with concentrate without oilseeds (CON), with whole cottonseed (CTS), rapeseed (RPS) or linseed (LNS). Oilseeds were supplemented during weeks 1–16 (spring period) and 17–22 (summer period), and the autumn period (wk 23–27) was used to evaluate treatment carryover effects. Cows fed CTS decreased CH4 yield by 14% compared to CON in spring, but these effects did not persist after 19 weeks of supplementation (summer). Compared to CON, RPS decreased milk yield and CTS increased milk fat concentration in both spring and summer. In summer, CTS also increased milk protein concentration but decreased milk yield, compared to CON. In spring, compared to CON, CTS decreased most milk medium-chain fatty acids (FA; 8:0, 12:0, 14:0 and 15:0) and increased stearic, linoleic and rumenic FA, and LNS increased CLA FA. There were no carry-over effects into the autumn period. In conclusion, supplementation of grazing dairy cows with whole oilseeds resulted in mild effects on methane emissions and animal performance. In particular, supplementing with CTS can decrease CH4 yield without affecting milk production, albeit with a mild and transient CH4 decrease effect. Long term studies conducted under grazing conditions are important to provide a comprehensive overview of how proposed nutritional CH4 mitigation strategies affect productivity, sustainability and consumer health aspects.

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Effects of feeding unprocessed oilseeds on methane emission, nitrogen utilization efficiency and milk fatty acid profile of lactating dairy cows

Cited by 22 publications

References 49 publications

Effects of Starch Level and a Mixture of Sunflower and Fish Oils on Nutrient Intake and Digestibility, Rumen Fermentation, and Ruminal Methane Emissions in Dairy Cows

Effects of Starch Level and a Mixture of Sunflower and Fish Oils on Nutrient Intake and Digestibility, Rumen Fermentation, and Ruminal Methane Emissions in Dairy Cows

Dietary supplemental plant oils reduce methanogenesis from anaerobic microbial fermentation in the rumen

Long-Term and Carryover Effects of Supplementation with Whole Oilseeds on Methane Emission, Milk Production and Milk Fatty Acid Profile of Grazing Dairy Cows

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