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Showing 1 to 12 of 12 for “"rumen function"”.
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Effect of Forage Physical Form on Chewing Activity, Dry Matter Intake, and Rumen Function of Dairy Cows
Forage particle size (FPS) has been extensively investigated as a modifier of dry matter intake (DMI), chewing activity, and digesta passage in sheep and steers fed all forage diets, but has not been examined using dairy cows in early lactation. The purpose of this study was to determine effect of …
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The effect of supplementary maize silage on rumen function in dairy cows grazing high quality pasture : A thesis submitted in partial fulfilment of the requirements for the Degree of Bachelor of Agricultural Science with Honours at Lincoln University
… of maize silage altered the diurnal pattern of rumen pH, with the pH of maize supplemented cows being significantly higher than that of pasture-fed (control) animals for several intervals of the day. Consequently, the diurnal rumen pH curve was flatter as a result. This increase in mean rumen pH …
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Effects of Feeding Hulless Barley (Hordeum vulgare L.) and Supplementing a Fibrolytic Enzyme on Production Performance, Nutrient Digestibility, and Milk Fatty Acid Composition of Lactating Dairy Cows
… performance would be explained by an altered rumen function, which would be reflected in a reduction of the proportion of de novo fatty acids in milk fat. The inclusion of hulless barley grain as the energy source in diets for lactating dairy cows resulted in similar production performance and …
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Mathematical models of the physiological mechanisms affecting the adaptation of growing cattle during and after a period of undernutrition
… of tissues, the recycling of nitrogen to the rumen via the saliva and across the rumen wall, and the relation between intake and animal size. However, most simulation models have attempted to represent the mechanisms for above-maintenance nutritional restrictions. In this study, a simulation …
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White clover inclusion in intensive dairy production systems
… production, dairy cow production, dairy cow rumen function and overall farm gate N balance were investigated. White clover inclusion increased herbage production at fertiliser application rates of up to and including 180 kg N/ha/year in the plotbased study described in chapter 4 of this …
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Analysis of the ammonium assimilation pathways of the human colonic bacterium, bacteroides thetaiotaomicron
In ruminants, efficient rumen function and proper host metabolism is dependent on the nitrogen supply in the feed. Assimilated ammonium accounts for up to 70% of the microbial protein production, which satisfies up to 85% of the host protein requirements. Similar numbers for the human colon have …
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Reducing the impact of feedstuff transport by a better utilization of plant wastes for livestock: a way to improve meat quality?
… The first experiment examined the response of rumen function to diets rich in phenolic compounds (i.e. tannins), which are secondary metabolites prevalent in several plant by-products. Concentrate diet supplemented with 4% of two hydrolysable (chestnut and tara) and condensed (mimosa and …
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In vivo and modeling approaches to improve prediction of phosphorus availability in ruminants
… salivary P secretion at low dietary P suggested rumen function was prioritized during short-term P deficiency. Finally the data from these experiments along with four other studies were used to parameterize the P digestion and metabolism model of Hill et al. (2008) to provide a better …
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Nitrogen metabolism in meatmaster sheep fed brewers grain as a supplementary source of protein
… (TNE), and nitrogen retention (NR) in g/day, rumen fermentation and microbial parameters (allantoin concentration (mmol/L), microbial nitrogen yield (g/day), microbial true protein (MTP, g/day), digestible organic matter in the rumen (DOMR, g/day), nitrogen utilisation efficiency (Emns, g N/kg …
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Ruminal Degradation of Polyhydroxyalkanoate and Poly(butylene succinate-co-adipate)
… contain plastic foreign materials in their rumen. These materials are indigestible and accumulate for the lifetime of the animal. As these materials accumulate, they may reduce feed efficiency and production by erosion and ulceration of rumen epithelium, stunting of papillae, blockage of the …
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Nutritional constraints to lamb growth at pasture
… sheep, which permitted repeated measurement of rumen digesta content. A preliminary experiment, conducted indoors, studied the effect of lamb age and cannulation on the development of rumen function in lambs weaned at 6 weeks of age and offered clover hay ad libitum. Cannulation did not affect …