Kim Ominski
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View article: Economic and circular economy analysis of including potato waste in beef feedlot diets: a Canadian case study
Economic and circular economy analysis of including potato waste in beef feedlot diets: a Canadian case study Open
Introduction The present study investigates the combined impact of adding a common agricultural waste by-product alternative feed (cull potatoes) to the diet of feedlot cattle on both economic profitability and greenhouse gas (GHG) emissio…
View article: 84 Intercropping corn with annual forages for potential fall/winter grazing of beef cattle across the Canadian prairies
84 Intercropping corn with annual forages for potential fall/winter grazing of beef cattle across the Canadian prairies Open
The objective of this study was to determine the optimal annual forage species to intercrop with corn for potential fall/winter grazing of beef cattle across the Canadian prairies. Corn is a high energy and yielding crop for grazing beef c…
View article: 78 The impact of intercropping corn with annual forages on forage chemical composition and bred heifer performance during late fall/early winter grazing in Western Canada.
78 The impact of intercropping corn with annual forages on forage chemical composition and bred heifer performance during late fall/early winter grazing in Western Canada. Open
Extended grazing is frequently used by Canadian beef producers to reduce winter feed costs. Corn is a high-energy forage with increased biomass yield per hectare compared to other annual crops. However, corn has low CP concentration which …
View article: PSXI-23 Modelling environmental impacts associated with use of implants in pre-weaned calves.
PSXI-23 Modelling environmental impacts associated with use of implants in pre-weaned calves. Open
The performance and environmental sustainability advantages of implanting backgrounded and finished cattle have been well documented. The objective of this research is to explore the environmental sustainability of implanting pre-weaned ca…
View article: Divergent trends in structural landscape connectivity from historic and potential future grassland conversion in Alberta, Canada
Divergent trends in structural landscape connectivity from historic and potential future grassland conversion in Alberta, Canada Open
Grasslands across the Canadian prairies are crucial for maintaining biodiversity and ensuring landscape connectivity. In Alberta, a large portion of natural grasslands has been converted to agricultural cropland or other land uses, while t…
View article: 192 Environmental impacts associated with feeding bread by-products to growing and finishing feedlot cattle
192 Environmental impacts associated with feeding bread by-products to growing and finishing feedlot cattle Open
Global environmental challenges including the need to reduce food waste and greenhouse gas (GHG) emissions have led to an increasing need to improve the sustainability of our food systems. To address this need, we examined the environmenta…
View article: Impact of Feed Composition on Rumen Microbial Dynamics and Phenotypic Traits in Beef Cattle
Impact of Feed Composition on Rumen Microbial Dynamics and Phenotypic Traits in Beef Cattle Open
The rumen microbiome is central to feed digestion and host performance, making it an important target for improving ruminant productivity and sustainability. This study investigated how feed composition influences rumen microbial abundance…
View article: Ensiling of food waste for subsequent inclusion in ruminant diets
Ensiling of food waste for subsequent inclusion in ruminant diets Open
There is growing global concern about food waste, leading to increased interest in using it as livestock feed. However, since most food waste is high in moisture, it spoils quickly, making it necessary to feed it immediately or preserve it…
View article: Environmental impacts associated with the removal of productivity-enhancing technologies from three different beef steer post-weaning management systems
Environmental impacts associated with the removal of productivity-enhancing technologies from three different beef steer post-weaning management systems Open
Environmental impacts of recently weaned Angus–continental steers raised without (NAT) or with (CON) productivity-enhancing technologies (PETs) in the form of hormonal implants (Ralgro®, Revalor®-G Revalor®-S, tylosin, monensin) were inves…
View article: 72 Environmental impacts associated with the removal of productivity enhancing technologies from three different post-weaning feed management strategies in Saskatchewan: A case study
72 Environmental impacts associated with the removal of productivity enhancing technologies from three different post-weaning feed management strategies in Saskatchewan: A case study Open
The purpose of this research was to examine the use of productivity enhancing technologies (PETs) and post-weaning management on the environmental impacts of beef steers in western Canada. The PETs considered in the current study included …
View article: 316 A 99-year journey on the use of by-product feeds in Canadian livestock production
316 A 99-year journey on the use of by-product feeds in Canadian livestock production Open
For centuries livestock have had a significant role as ‘upcyclers’, with the ability to convert inedible food into high quality protein in the form of meat, milk, or fiber. Currently, a large portion of the feed utilized in livestock produ…
View article: 69 The Holos model for estimating greenhouse gases and soil carbon: Characterizing regionalized beef farm model systems
69 The Holos model for estimating greenhouse gases and soil carbon: Characterizing regionalized beef farm model systems Open
The objective of this work is to characterize regionally representative beef farm systems that represent dominant or typical surveyed management practices for 11 beef-producing regions across Canada. This work fulfills two further purposes…
View article: PSXI-5 Transforming retailer’s food waste into silage for sustainable animal nutrition
PSXI-5 Transforming retailer’s food waste into silage for sustainable animal nutrition Open
Food waste (FW) represents a major environmental and socio-economic problem. In Canada, about 11.2 million metric tons of avoidable food waste is produced yearly. An alternative to reduce this impact would be preserving a greater proportio…
View article: Characterization of First Cut Alfalfa and Grass Silage Management Practices on Canadian Dairy Farms
Characterization of First Cut Alfalfa and Grass Silage Management Practices on Canadian Dairy Farms Open
Production practices for first cut alfalfa (ALF), alfalfa-grass (AFG) and grass silages (GRS) were surveyed on dairy farms in four Canadian regions, i.e. British Columbia (BC, n=21), Prairies (PRA, n=32), Central Canada (CEN, n=218), and A…
View article: Effect of red osier dogwood extract on in vitro gas production, dry matter digestibility, and fermentation characteristics of forage-based diet or grain-based diet
Effect of red osier dogwood extract on in vitro gas production, dry matter digestibility, and fermentation characteristics of forage-based diet or grain-based diet Open
This in vitro batch culture study investigated the effects of red osier dogwood (ROD) extract supplementation on gas production (GP), dry matter disappearance (DMD), and fermentation characteristics in high forage (HF) and high grain (HG) …
View article: Optimizing Silage Strategies for Sustainable Livestock Feed: Preserving Retail Food Waste
Optimizing Silage Strategies for Sustainable Livestock Feed: Preserving Retail Food Waste Open
In Canada, approximately 11.2 million metric tons of avoidable food waste (FW) is produced per year. Preservation of a greater proportion of this FW for use as livestock feed would have significant environmental and socioeconomic benefits.…
View article: An assessment of the environmental sustainability of beef production in Canada
An assessment of the environmental sustainability of beef production in Canada Open
This study assessed the environmental impacts of beef cattle production and their effects on the overall sustainability of Canadian beef production. Cradle to farm gate, cradle to processor’s gate, and cradle to consumer plate life cycle a…
View article: PSXIII-13 Effect of Supplementation of Red Osier Dogwood Extract on Feed Intake and Growth Performance of Newly Weaned Beef Calves
PSXIII-13 Effect of Supplementation of Red Osier Dogwood Extract on Feed Intake and Growth Performance of Newly Weaned Beef Calves Open
Red osier dogwood (ROD) is a Canadian native shrub plant that is rich in phenolic compounds with antimicrobial and antioxidant properties. The high phenolic compounds with antimicrobial and antioxidant properties would be beneficial to red…
View article: 204 Evaluation of the Chemical Composition and Animal Performance of Intermediate Wheatgrass (<i>Thinopyrum intermedium</i>) Regrowth for Potential Fall Grazing of Beef Cattle
204 Evaluation of the Chemical Composition and Animal Performance of Intermediate Wheatgrass (<i>Thinopyrum intermedium</i>) Regrowth for Potential Fall Grazing of Beef Cattle Open
This study assessed forage yield and chemical composition, feed intake, and performance of beef heifers grazing intermediate wheatgrass (IWG) regrowth post-grain harvest compared with a stockpiled grass/legume control in the late fall. Pas…
View article: Quality and safety of hemp meal as a protein supplement for nonlactating dairy cows
Quality and safety of hemp meal as a protein supplement for nonlactating dairy cows Open
Hemp seed meal may be a suitable protein supplement for dairy cows, but its quality and safety as a dairy cow feed has not yet been fully investigated. As a result, dry matter intake (DMI), rumen fermentation, blood metabolites, total-trac…
View article: Comparing dehulled hemp meal and canola meal as a protein supplement for lactating dairy cows
Comparing dehulled hemp meal and canola meal as a protein supplement for lactating dairy cows Open
Effects of replacing canola meal with dehulled hemp meal in the diet of lactating dairy cows on the dry matter intake (DMI), milk production, milk fatty acid profile, blood metabolites, total-tract nutrient digestibility, and transfer of c…
View article: Regionalized life cycle inventory data collection and calculation for perennial forage production in Canada: methodological best practices and limitations
Regionalized life cycle inventory data collection and calculation for perennial forage production in Canada: methodological best practices and limitations Open
Purpose In Canada, 95–99% of produced forages are consumed domestically each year, mainly by beef cattle. Despite their importance, their contribution to the Canadian livestock industry and associated ecosystem services has not been invest…
View article: Modelling environmental impacts associated with the removal of productivity-enhancing technologies from Canadian feedlots: a case study
Modelling environmental impacts associated with the removal of productivity-enhancing technologies from Canadian feedlots: a case study Open
Greenhouse gas (GHG) and ammonia (NH 3 ) emissions, land and water use associated with feedlot cattle ( n = 40 hd treatment −1 trial −1 ) treated with or without productivity-enhancing technologies were modelled for a multiyear study ( n =…
View article: PSXVI-6 Ruminal dry Matter Disappearance, Methane Production and Fermentation Parameters as Affected by fat and Protein Concentration in by-Product Supplemented Grass hay-Based Diets
PSXVI-6 Ruminal dry Matter Disappearance, Methane Production and Fermentation Parameters as Affected by fat and Protein Concentration in by-Product Supplemented Grass hay-Based Diets Open
This batch culture study evaluated the effects of crude protein (CP) and fat concentration on ruminal dry matter disappearance (DMD), methane (CH4) production, and ruminal fermentation in grass hay-based diets supplemented with by-product …
View article: 65 The Role of Livestock as up-Cyclers of Food by-Products and Waste
65 The Role of Livestock as up-Cyclers of Food by-Products and Waste Open
Food waste is a global dilemma with environmental, social and economic consequences. Environmental impacts of wasted food are substantial as it comprises the single largest category of organic matter in municipal landfills. Therefore, redi…
View article: PSXII-14 Impact of Nitrogen Application and Intercrop Forage Species on Chemical Composition and Yield of Standing Corn and Intercropped Forages
PSXII-14 Impact of Nitrogen Application and Intercrop Forage Species on Chemical Composition and Yield of Standing Corn and Intercropped Forages Open
This study evaluated the impact of nitrogen (N) application rate and forage species of intercropped corn for potential grazing of beef cattle in late fall/early winter. A split plot design (4 replicates/treatment) was used at 2 experimenta…
View article: Environmental performance of commercial beef production systems utilizing conventional productivity-enhancing technologies
Environmental performance of commercial beef production systems utilizing conventional productivity-enhancing technologies Open
The objective of this study was to evaluate the effects of using conventional productivity-enhancing technologies (PETs) with or without other natural PETs on the growth performance, carcass traits, and environmental impacts of feedlot cat…
View article: Evaluation of biochar products at two inclusion levels on ruminal in vitro methane production and fermentation parameters in a Timothy hay-based diet
Evaluation of biochar products at two inclusion levels on ruminal in vitro methane production and fermentation parameters in a Timothy hay-based diet Open
This study evaluated the effects of seven biochar products at two levels of inclusion [2.25% or 4.50% diet dry matter (DM)] on DM disappearance (DMD), cumulative gas and methane (CH 4 ) production, ammonia-nitrogen, and volatile fatty acid…