Increasing the concentration of linolenic acid in diets fed to Jersey cows in late lactation does not affect methane production

J. V. Judy, G. C. Bachman, T. M. Brown-Brandl, S. C. Fernando, K. E. Hales, Kevin John Harvatine, P. S. Miller, P. J. Kononoff

Research output: Contribution to journalArticle

Abstract

Although the inclusion of fat has reduced methane production in ruminants, relatively little research has been conducted comparing the effects of source and profile of fatty acids on methane production in lactating dairy cows. A study using 8 multiparous (325 ± 17 DIM; mean ± SD) lactating Jersey cows was conducted to determine effects of feeding canola meal and lard versus extruded byproduct containing flaxseed as a high-C18:3 fat source on methane production and diet digestibility in late-lactation dairy cows. A crossover design with 32-d periods (28-d adaptation and 4-d collections) was used to compare 2 different fat sources. Diets contained approximately 50% forage mixture of corn silage, alfalfa hay, and brome hay; the concentrate mixture changed between diets to include either (1) a conventional diet of corn, soybean meal, and canola meal with lard (control) or (2) a conventional diet of corn and soybean meal with an extruded byproduct containing flaxseed (EXF) as the fat source. Diets were balanced to decrease corn, lard, and canola meal and replace them with soybean mean and EXF to increase the concentration of C18:3 (0.14 vs. 1.20% of DM). Methane production was measured using headbox-style indirect calorimeters. Cattle were restricted to 95% ad libitum feed intake during collections. Milk production (17.4 ± 1.04 kg/d) and dry matter intake (15.4 ± 0.71 kg/d) were similar among treatments. Milk fat (5.88 ± 0.25%) and protein (4.08 ± 0.14%) were not affected by treatment. For methane production, no difference was observed for total production (352.0 vs. 349.8 ± 16.43 L/d for control vs. EXF, respectively). Methane production per unit of dry matter intake was not affected and averaged 23.1 ± 0.57 L/kg. Similarly, methane production per unit of energy-corrected milk was not affected by fat source and averaged 15.5 ± 0.68 L/kg. Heat production was similar, averaging 21.1 ± 1.02 Mcal/d. Digestibility of organic matter, neutral detergent fiber, and crude protein was not affected by diet and averaged 69.9, 53.6, and 73.3%, respectively. Results indicated that increasing C18:3 may not affect methane production or digestibility of the diet in lactating dairy cows.

Original languageEnglish (US)
Pages (from-to)2085-2093
Number of pages9
JournalJournal of dairy science
Volume102
Issue number3
DOIs
StatePublished - Mar 1 2019

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alpha-Linolenic Acid
late lactation
Methane
Jersey
methane production
linolenic acid
Lactation
Diet
cows
Fats
Meals
diet
canola meal
Zea mays
lard
Soybeans
lipids
Flax
Milk
dairy cows

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Judy, J. V. ; Bachman, G. C. ; Brown-Brandl, T. M. ; Fernando, S. C. ; Hales, K. E. ; Harvatine, Kevin John ; Miller, P. S. ; Kononoff, P. J. / Increasing the concentration of linolenic acid in diets fed to Jersey cows in late lactation does not affect methane production. In: Journal of dairy science. 2019 ; Vol. 102, No. 3. pp. 2085-2093.
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abstract = "Although the inclusion of fat has reduced methane production in ruminants, relatively little research has been conducted comparing the effects of source and profile of fatty acids on methane production in lactating dairy cows. A study using 8 multiparous (325 ± 17 DIM; mean ± SD) lactating Jersey cows was conducted to determine effects of feeding canola meal and lard versus extruded byproduct containing flaxseed as a high-C18:3 fat source on methane production and diet digestibility in late-lactation dairy cows. A crossover design with 32-d periods (28-d adaptation and 4-d collections) was used to compare 2 different fat sources. Diets contained approximately 50{\%} forage mixture of corn silage, alfalfa hay, and brome hay; the concentrate mixture changed between diets to include either (1) a conventional diet of corn, soybean meal, and canola meal with lard (control) or (2) a conventional diet of corn and soybean meal with an extruded byproduct containing flaxseed (EXF) as the fat source. Diets were balanced to decrease corn, lard, and canola meal and replace them with soybean mean and EXF to increase the concentration of C18:3 (0.14 vs. 1.20{\%} of DM). Methane production was measured using headbox-style indirect calorimeters. Cattle were restricted to 95{\%} ad libitum feed intake during collections. Milk production (17.4 ± 1.04 kg/d) and dry matter intake (15.4 ± 0.71 kg/d) were similar among treatments. Milk fat (5.88 ± 0.25{\%}) and protein (4.08 ± 0.14{\%}) were not affected by treatment. For methane production, no difference was observed for total production (352.0 vs. 349.8 ± 16.43 L/d for control vs. EXF, respectively). Methane production per unit of dry matter intake was not affected and averaged 23.1 ± 0.57 L/kg. Similarly, methane production per unit of energy-corrected milk was not affected by fat source and averaged 15.5 ± 0.68 L/kg. Heat production was similar, averaging 21.1 ± 1.02 Mcal/d. Digestibility of organic matter, neutral detergent fiber, and crude protein was not affected by diet and averaged 69.9, 53.6, and 73.3{\%}, respectively. Results indicated that increasing C18:3 may not affect methane production or digestibility of the diet in lactating dairy cows.",
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Judy, JV, Bachman, GC, Brown-Brandl, TM, Fernando, SC, Hales, KE, Harvatine, KJ, Miller, PS & Kononoff, PJ 2019, 'Increasing the concentration of linolenic acid in diets fed to Jersey cows in late lactation does not affect methane production', Journal of dairy science, vol. 102, no. 3, pp. 2085-2093. https://doi.org/10.3168/jds.2018-14608

Increasing the concentration of linolenic acid in diets fed to Jersey cows in late lactation does not affect methane production. / Judy, J. V.; Bachman, G. C.; Brown-Brandl, T. M.; Fernando, S. C.; Hales, K. E.; Harvatine, Kevin John; Miller, P. S.; Kononoff, P. J.

In: Journal of dairy science, Vol. 102, No. 3, 01.03.2019, p. 2085-2093.

Research output: Contribution to journalArticle

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T1 - Increasing the concentration of linolenic acid in diets fed to Jersey cows in late lactation does not affect methane production

AU - Judy, J. V.

AU - Bachman, G. C.

AU - Brown-Brandl, T. M.

AU - Fernando, S. C.

AU - Hales, K. E.

AU - Harvatine, Kevin John

AU - Miller, P. S.

AU - Kononoff, P. J.

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Y1 - 2019/3/1

N2 - Although the inclusion of fat has reduced methane production in ruminants, relatively little research has been conducted comparing the effects of source and profile of fatty acids on methane production in lactating dairy cows. A study using 8 multiparous (325 ± 17 DIM; mean ± SD) lactating Jersey cows was conducted to determine effects of feeding canola meal and lard versus extruded byproduct containing flaxseed as a high-C18:3 fat source on methane production and diet digestibility in late-lactation dairy cows. A crossover design with 32-d periods (28-d adaptation and 4-d collections) was used to compare 2 different fat sources. Diets contained approximately 50% forage mixture of corn silage, alfalfa hay, and brome hay; the concentrate mixture changed between diets to include either (1) a conventional diet of corn, soybean meal, and canola meal with lard (control) or (2) a conventional diet of corn and soybean meal with an extruded byproduct containing flaxseed (EXF) as the fat source. Diets were balanced to decrease corn, lard, and canola meal and replace them with soybean mean and EXF to increase the concentration of C18:3 (0.14 vs. 1.20% of DM). Methane production was measured using headbox-style indirect calorimeters. Cattle were restricted to 95% ad libitum feed intake during collections. Milk production (17.4 ± 1.04 kg/d) and dry matter intake (15.4 ± 0.71 kg/d) were similar among treatments. Milk fat (5.88 ± 0.25%) and protein (4.08 ± 0.14%) were not affected by treatment. For methane production, no difference was observed for total production (352.0 vs. 349.8 ± 16.43 L/d for control vs. EXF, respectively). Methane production per unit of dry matter intake was not affected and averaged 23.1 ± 0.57 L/kg. Similarly, methane production per unit of energy-corrected milk was not affected by fat source and averaged 15.5 ± 0.68 L/kg. Heat production was similar, averaging 21.1 ± 1.02 Mcal/d. Digestibility of organic matter, neutral detergent fiber, and crude protein was not affected by diet and averaged 69.9, 53.6, and 73.3%, respectively. Results indicated that increasing C18:3 may not affect methane production or digestibility of the diet in lactating dairy cows.

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