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Showing 1 to 20 of 181 for “"feed efficiency"”.
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Evaluation of intake and feed efficiency measures in beef cattle
… conducted to evaluate intake and measures of feed efficiency in beef cattle. In Exp. 1 and 2, measures of feed efficiency were calculated on Angus and SimAngus heifers (Exp.1; n = 623, and Exp. 2; 404); and heifers were classified as either high, medium, or low residual feed intake (RFI), …
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Improving Feed Efficiency Through Forage Strategies for Increasing Dairy Profitability and Sustainability
… study specific hypothesis in regard to improving feed efficiency through various forage utilization strategies with or without the inclusion of various supplemented products. The first study evaluated the supplementation of a cobalt-lactate product and its effects on fiber digestibility and milk …
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Effects of Certain Steroid Hormones on Growth and Feed Efficiency in Chickens
Made available in DSpace on 2014-12-05T17:47:30Z (GMT). No. of bitstreams: 1 0018130.pdf: 3603351 bytes, checksum: 2eb803fbedc78b7c6f7eff29d78682a1 (MD5) Previous issue date: 1956
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Approaches for Developing and Implementing Precision Feeding Programs to Maximize Feed Efficiency
… ration formulation may be improved by predicting feeding recommendations for individual animals, rather than groups of animals, through precision feeding. Automated feeding systems (AFS) designed to deliver individual rations must include response-based models that utilize individual cow …
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METHANE MITIGATION, FEED EFFICIENCY, AND HEAT STRESSIN REPLACEMENT HEIFERS: NUTRITIONAL ANDMANAGEMENT APPROACHES FOR SUSTAINABLE DAIRYPRODUCTION
… In particular, the research focused on improving feed efficiency, mitigating methane emissions, and alleviating the detrimental effects of heat stress in Italian Holstein dairy heifers. The first study (Chapter 3) describes an in vivo trial evaluating the inclusion of increasing doses of lysozyme …
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Effects of Nutrition and Management on Feed Efficiency, Carcass Value, and Profitability in Feedlot Cattle
… influence of sire, diet, and body composition on feed efficiency and profitability. Diet digestibility was higher for corn based finishing diets and lower for diets containing wet corn gluten feed (WCGF). Average daily gain was the lowest for the diet containing WCGF. Dry matter intake was lower …
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Feeding native rumen microbial supplements increases energy-corrected milk and feed efficiency in holstein cows
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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The effects of stocking density and housing on feed efficiency and growth performance of broiler chickens
… such as high input costs, particularly feed, and lack of domestically produced ingredients. To maximize broiler performance, producers should improve feed efficiency, which is crucial for profitability and long-term viability. Factors affecting feed efficiency include energy level of …
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PLANT SECONDARY METABOLITES AS A STRATEGY TO REDUCE METHANE EMISSIONS AND IMPROVE FEED EFFICIENCY IN RUMINANTS
… project (Tannins of willow and hemp as organic feed additives for methane reduction in dairy cows). All experiments aimed to evaluate different plant secondary metabolites (PSM), included in ruminant diets, in order to reduce rumen methanogenesis. 1 - In the first paper, originated from the …
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Genotype by environment interaction for feed efficiency in growing-finishing pigs in Brazil versus the Netherlands
… main goals of modem pig breeding 1s to improve feed efficiency of crossbred (CB) pigs across the diverse, and often challenging, environments in commercial farms. The main aim of this thesis was to investigate the existence and magnitude of genotype by environment interaction for feed efficiency …
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Identification and characterization of genetic markers and metabolic pathways controlling net feed efficiency in beef cattle.
Net feed intake or residual feed intake is the feed intake of an animal after adjustment for its average weight and weight gain while on the feed test. High net feed efficiency (NFE) animals have a low net feed intake, so the aim is to select animals that have high net feed efficiency in order to …
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Effect of energy and undegraded intake protein on growth and feed efficiency of growing Holstein heifers
… high energy, but not affected by VIP. Overall DM efficiency was not affected by VIP or energy level. Results of both trials indicate VIP may improve feed efficiency of growing Holstein heifers.
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Three Overlooked Issues: Water Quality, Forage Quality, and Forage Blends Impacting the Feed Efficiency of Dairy Cows
… of the six studies were to increase the feed efficiency in lactating dairy cows. The first study evaluated the efficacy of different water sources and treatment systems on ruminal parameters using an in vitro gas production system. Outcomes of the study suggested that the source and …
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Evaluation of feedlot feed efficiency relationships as well as genetic and phenotypic performance, carcass, and economic outcomes
Several feed efficiency values have recently been proposed including: feed conversion ratio in terms of feed:gain (FCR), residual feed intake (RFI), and residual BW gain (RG), and residual intake and BW gain (RIG). These all have production efficiency potential since they include feed intake inputs …
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Assessing the reliability of plant-wax markers to delineate diet choice and feed efficiency in beef heifers
Estimating feed efficiency in grazing environments is challenging due to difficulties in quantifying food intakes and diet choices in free-grazing animals. The plant-wax marker technique may be a useful tool to redress this problem. However, its reliability needs to be validated before its wider …
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Effects of early weaning on finishing feed efficiency, marbling development and retail product quality of beef steers
… the effects of early weaning on finishing feed efficiency, marbling development and retail product quality of beef steers. In experiment I, which included 90 Angus-sired steers from four calving seasons, early weaning followed by a short ad libitum concentrate-feeding and …
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Influence of feed efficiency ranking and maternal nutrition on gut microbiome, metabolome, and transcriptome in beef and dairy cattle
Residual feed intake (RFI) describes an animal’s feed efficiency independent of the level of growth and production performance. The RFI has become a commonly used measure for feed efficiency in beef and dairy cattle. The first experiment was to determine differences in major ruminal bacteria and …
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Copper from copper hydroxychloride in diets for growing pigs increases feed efficiency, improves energy utilization and changes intestinal microbial activity
… that Cu from Cu hydroxychloride improves gain:feed (G:F) when fed to pigs (initial body weight: 15.40 ± 2.39 kg) by increasing ATTD of AEE. Results indicated that G:F linearly increased (P < 0.05) as CWG concentration increased in diets. Supplementation of Cu hydroxychloride to diets improved …
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The Evaluation of Genetic and Phenotypic Differences Associated with Short Term Selection of Four Different Feed Efficiency Strategies in Japanese Quail
<p>The concept of feed efficiency (FE), one unit of feed required to improve one unit of desired output, is relatively simple. However multiple outputs are desired in a commercial poultry breeding program, resulting in the need for nutrients to be partitioned in a particular manner. At the broadest …
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