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Dairy cattle ruminal performance
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This is an interesting forum from our Spanish community, generated by Francisco Piedrahita from Colombia:
I would like to know some theoretical curve representing the behavior of a cows milk production during lactation 305. My interest is in comparing the actual production curves of my cattle with curves and optimal production 2000msnm heights, cold temperatures and high rainfall.
Was it good to derive from the performance curve of milk production per unit of time, as in the...
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Introduction Over millennia, grazing ruminants have, for the most part, evolved on the great grasslands of the world, ranging from the savanna and tropical grasslands of the equatorial regions to the temperate grasslands at slightly higher latitudes. Less extensive are the high-altitude alpine pasture and marginal tundra biomes, in which many unique distinctive breeds and species of livestock have evolved, which, although...
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As the demand for animal protein continue to increase, global animal production faces several challenges in order to meet these demands because of environmental challenges (global warming and climate change). Furthermore, the intensification of animal production systems might compromise animal health and welfare and consequently increase the incidence of the metabolic diseases. Ruminant health and production is crucial for a sustainable animal production system,...
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Sub-acute ruminal acidosis (SARA), also known as chronic or sub-clinical acidosis, is a well-recognized digestive disorder that is an increasing health problem in most dairy herds. Results from field studies indicate a high prevalence of SARA in high-producing dairy herds as producers respond to the demands for increased milk production with higher grain, lower fibre diets that maximize energy intake during early lactation. Dairy herds experiencing SARA will have a decreased efficiency of milk...
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Please I have several producers that have problems with their cows related to repetitive tympanism, ie cows present abdominal pain daily. I have checked the grass they eat and I must say that in many cases the grass alfalfa is not tender, might this be a cause? I would appreciate any suggestion/idea, thanks.... ...
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INTRODUCTION In ruminant animals, rumen microbes utilize different fractions of protein, non-fiber carbohydrate and structural carbohydrate (CHO) at different rates. When rate of protein degradation exceeds the rate of CHO fermentation, large quantity of N is lost as NH 3 . On the other hand, when rate of CHO fermentation exceeds protein degradation rate, there is inefficient microbial protein production....
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Rumen acidosis results from an excessive acid load in the rumen not neutralized by salivary or feed buffers. Changes in physiology, metabolism, and behavior of heat-stressed cows increase their susceptibility to both sub-acute (SARA) and acute acidosis. Mishra et al. (1970) observed lower rumen pH when cows were fed 65% forage diets under warm, humid conditions (pH 6.1; 84.9F; 85% RH) compared to cooler, drier conditions (pH 6.4; 64.9F; 50 % RH). When forage in...
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International Journal of Phytopharmacy Research Article Vol. 4 (2), pp.67-69, Mar-Apr 2014 ISSN: 2277-2928 (Online) Journal DOI:10.7439/ijpp ©Scholar Science Journals www.ssjournals.com Abstract Productivity of dairy animals depends not only on good nutritional diet but also on its proper digestion and assimilation. A...
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Bill Braman, Vice President of Chr. Hansen's cattle business, speaks about problems with starch digestion, processing effects on starch digestability solutions to increase lower gut digestion , etc, during the VII Congress of Forage´s conservation and Nutrition...
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Heat stress could cost the dairy producer up to 400 €/cow/year ( Saint Pierre et al., 2003 ). Around 80% of these losses are associated with drop of productivity, and 20% with health issues: impaired reproduction and immunity, which translate into increased mortality and mastitis frequency etc. In 2011, Prof. Burgos Zimbelman and Collier, from University of Arizona revised the heat stress scale and revealed that the severity of heat stress was largely...
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From the developing bud to the industrial bug...
Being considered as the oldest and best understood microorganism, the yeast Saccharomyces cerevisiae still remains valuable to mankind's future. Since ages, Egyptians followed by Romans, used yeast to leaven bread and to produce alcoholic beverages. This clever bug has definitely a marvellous habit of evolving to suit its environment and has been the business vault of many industries....
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As producers, nutritionists and veterinarians we are used to seeing molds on the farm. Molds are ubiquitous in the environment and it has been well documented that some of these molds have the ability to produce poisons known as mycotoxins. Because of their ability to survive many environmental conditions, different species of molds have the ability to grow on the crop in the field pre-harvest, during harvest and also post harvest. It has also been documented that mycotoxin...
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Rumen pH is one of the most critical determinants of rumen function particularly for the cellulolytic rumen bacteria which fail to grow at pH 6.0 and below. Rumen pH falls as a result of enhanced fermentation due to increasing concentrate in the diet, this fall inhibits degradation of the fibrous components of the diet and is the cause, in part at least, of the negative associative effects between forages and concen- trates. It has been suggested that feed additives based on...
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Rumen microbiology
The rumen is the first stomach of cattle, sheep and goats. All digestion in this organ is carried out by a microbial population which consists of ciliate protozoa, anaerobic bacteria and anaerobic fungi. The bacteria are genetically very diverse, deriving from many different origins, whereas the protozoa are monophyletic, thought to have evolved from a symbiotic protozoan which established in the rumen...
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Reducing potential can be defined as the tendency of a system to gain or donate electrons, and it is a derivation of the Gibbs free energy change equation applied to redox reactions. Redox reactions are those in which chemical species change their oxidation numbers and, generally, electrons are transferred between them. The Gibbs free energy change equation is derived from the First and Second Laws of classical thermodynamics and allows calculating whether or not...
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The dairy cow is a magnificent producer of food. In approximately 10 months, a good cow can produce 496 pounds of protein, 784 pounds of energy in the form of the sugar lactose, 560 pounds of fat, and 112 pounds of minerals all in 16,000 pounds of milk. This is enough protein to supply the needs of a man for nearly 10 years, enough energy for 5 years, and enough calcium for 30 years. The supply of high quality feedstuffs to the cow's highly complex digestive system helps accomplish this...
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Our thanks to the author and Conference Organisers, a Committee consisting of both University and Industry colleagues. The full paper appears in the Conference Proceedings ('Recent Advances in Animal Nutrition - 2007', edited by Phil Garnsworthy and Julian Wiseman) published by Nottingham University Press in 2007 www.nup.com ...
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TO OPTMISE RUMINANTS PERFORMANCE AND HEALTH, BIO REGULATON, A NEW CONCEPT, TARGETS EVERY STEP OF THE WHOLE NUTRTIONAL EXPERIENCE, FROM SENSORIAL STIMULATON AND APPETENCE TO DIGESTION EFFICACY AND DIGESTIVE HEALTH. VIRGINIE NOIROT EXPLAINS THE BENEFITS IN RUMINANTS. Based on the idea that the health, nutrition and behaviour (stress, well-being etc.) of farm animals should be considered as a whole, Phodé R&D department...
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Keeping cows in their thermoneutral zone – 41 and 68 degrees – can minimize the impact of seasonal changes on milk production, reproduction, feed efficiency and income-over-feed cost, said John Smith, a dairy science Extension specialist in the Department of Animal Sciences and Industry at Kansas State University. Speaking at the Cornell Fall Dairy Conference last year, Smith pointed out the negative and well-documented impacts of heat stress to a...
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As dairy consultants and managers use computer-based rumen models to fine-tune feeding programs, questions are raised. How effective are these programs? What information do they provide? Do software programs provide similar results? This study evaluated protein relationships and results. Material and Methods A standard ration was balanced using a university software program (Spartan II, Michigan State University) that did not have a rumen modeling software. The...
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