Effects of replacing soybean meal with canola meal or treated canola meal on ruminal digestion, omasal nutrient flow, and performance in lactating dairy cows

The objectives of the present study were to evaluate the nutritive value of expeller linseed meal (ELM) and solvent linseed meal (SLM) as protein supplements for lactating dairy cows utilizing analytical and in situ procedures, and determine the in vivo nutritive value of the most promising linseed meal in diets containing either barley or corn-based concentrate. Canola meal (CM) and soybean meal (SBM) were included in the evaluative stage for comparative purposes. Linseed meals contained 37.8 and 35.4% crude protein (CP); 22.6 and 25.9% neutral detergent fibre (NDF); and 12.9 and 7.1% crude fat for ELM and SLM, respectively. Rate and extent of dry matter, NDF, and CP digestion, as determined by the rumen in situ technique, indicated that ruminal digestibility of SLM was similar to that observed for CM, but ruminal escape of ELM protein was higher than for CM. The proportion of ruminal escape protein was similar for SLM, CM and SBM. Total tract CP digestibilities of SLM and CM were similar to and lower than those observed for ELM and SBM. Soybean meal had the highest total tract CP digestibility. Based on results of the analytical and in situ procedures, SLM was selected for evaluation in the in vivo experiment. Results indicated that SLM did not have any deleterious effect on digestion of other components of the diet, and parameters of rumen fermentation indicated similar digestion patterns for cows fed SLM and CM. Overall, results indicate that SLM has potential as a replacement for CM or SBM in diets of dairy cattle. It was also concluded that replacement of barley with corn does not influence the nutritive value of SLM for dairy cows. Key words: Linseed meal, canola meal, dairy cattle

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Effects of soybean meal or canola meal on milk production and methane emissions in lactating dairy cows fed grass silage-based diets

Journal of Dairy Science ◽

10.3168/jds.2015-9757 ◽

2015 ◽

Vol 98 (11) ◽

pp. 8093-8106 ◽

Cited By ~ 21

Author(s):

H. Gidlund ◽

M. Hetta ◽

S.J. Krizsan ◽

S. Lemosquet ◽

P. Huhtanen

Keyword(s):

Dairy Cows ◽

Milk Production ◽

Soybean Meal ◽

Methane Emissions ◽

Canola Meal ◽

Grass Silage ◽

Lactating Dairy Cows

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Production and nitrogen metabolism in lactating dairy cows fed finely ground field pea plus soybean meal or canola meal with or without rumen-protected methionine supplementation

Journal of Dairy Science ◽

10.3168/jds.2019-17186 ◽

2020 ◽

Vol 103 (4) ◽

pp. 3161-3176

Author(s):

A.B.D. Pereira ◽

D.C. Moura ◽

N.L. Whitehouse ◽

A.F. Brito

Keyword(s):

Dairy Cows ◽

Nitrogen Metabolism ◽

Soybean Meal ◽

Field Pea ◽

Canola Meal ◽

Ground Field ◽

Lactating Dairy Cows ◽

Methionine Supplementation

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Canola Meal versus Soybean Meal as Protein Supplements in the Diets of Lactating Dairy Cows Affects the Greenhouse Gas Intensity of Milk

Animals ◽

10.3390/ani11061636 ◽

2021 ◽

Vol 11 (6) ◽

pp. 1636

Author(s):

Lucia Holtshausen ◽

Chaouki Benchaar ◽

Roland Kröbel ◽

Karen A. Beauchemin

Keyword(s):

Dairy Cows ◽

Soybean Meal ◽

Dairy Cow ◽

Ghg Emissions ◽

Mitigation Strategy ◽

Canola Meal ◽

Ghg Mitigation ◽

Protein Supplements ◽

Lactating Dairy Cows ◽

Enteric Methane

Soybean meal (SBM) and canola meal (CM) are protein supplements used in lactating dairy cow diets and, recently, an enteric methane-mitigating effect (i.e., lower Ym value) was reported for CM. Before recommending CM as a greenhouse gas (GHG) mitigation strategy, it is necessary to examine the net impact on total GHG emissions from milk production. The objective was to determine whether using CM rather than SBM in lactating dairy cow diets decreases GHG per kilogram of fat and protein corrected milk (FPCM), and whether the decrease depends upon where the meals are produced. Cradle to farm-gate life cycle assessments were conducted for a simulated dairy farm in eastern (Quebec) and western (Alberta) Canada. Scenarios examined the source of protein meal, location where meals were produced, and the methane-mitigating effect of CM. The Holos model was used to estimate GHG emissions from animals, manure, crop production, imported feeds, and energy use. GHG intensities (CO2e/kg FPCM) were 0.85–1.02 in the east and 1.07–1.11 in the west for the various scenarios, with enteric methane comprising 34 to 40% of total emissions. CM produced in western Canada with a low up-stream emission factor and low Ym value reduced CO2e/kg FPCM by 3% (western farm) to 6.6% (eastern farm) compared with SBM. We conclude that using CM rather than SBM in the diet of lactating dairy cows can be a GHG mitigation strategy depending upon where it is produced and whether it decreases enteric methane emissions.

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