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Dairy cattle nutrition
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Summary Residual feed intake (RFI) is a measure of feed efficiency. It is the difference between the amount of feed eaten by an animal over a test period and the amount of feed predicted or expected to have been eaten by the animal based on its size and level of production. By this measure of efficiency, animals that eat less than expected have a negative RFI and are considered more efficient. The trait is heritable in beef cattle and it is...
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Introduction: Developing and verification of an in vitro methodology is a critical first step for the evaluation of a rumen bypass lysine source. Due to the variation in technologies of rumen bypass lysine, results of the different methods need to be evaluated. Once you have the in vitro method developed, understanding passage rate of product is critical. Most products are screened only using the Sterns 3 step method (Stern, 1995), which was...
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Managing Dairy Cows in an Extreme Warm Environment – an Israeli's Perspective. Real Science Lecture
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Introduction There are two main objectives of dairy farming. First objective is to get optimum milk production and second is to achieve maximum reproductive potential (i.e. calf a year) from dairy animals. Understanding the partitioning of nutrients in dairy animals during different phases of lactation cycle, and thereby the need of nutrients according to stage of lactation is important to achieve maximum genetic...
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ABSTRACT This experiment was conducted to study the effect of supplemental chromium on performance and blood serum biochemistry of dairy cows. Thus twenty multiparous Holstein cows (parity 2 or 3) were equally divided into two groups. Group one, control, which received no chromium supplementation and group two, treatment group, received 5mg/day chromium methionine from week 5 prior to parturition until 12 weeks thereafter. Milk production and...
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Introduction
The occurrence of resistance of bacteria strains to related families of in-feed antibiotics, and consequent loss of efficacy of these drugs, as well as legislation restricting nitrogen and methane levels in the environment, have prompted the search for alternatives to conventional growth promoters deemed `natural´ yet efficacious.
A...
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Hi, I'm a student of Master of Science ruminant nutrition. What would be the nutritional causes of stillbirth in heifers and dairy cows (parity 1). ...
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We are sciencing the global food challenge - Because it's all about life | Evonik
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Dr. Alejandro Castillo, Specialist in animal nutrition and farm adviser from the University of California-Davis, Cooperative Extension, USA, was present at the 3rd Congress of Animal Nutrition (CAENA) in Buenos Aires Argentina and gave a lecture about the use of minerals in dairy diets. ...
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ABSTRACT During this study, forty-five cows from Holstein Friesian were selected among the forty five, Fifteen cows were in early fifteen were in mid while fifteen were from late lactation stage. During this study the dietary plan was kept uniform for all the cows in the experiment. The protein contents were measured by spectrophotometer which revealed that the protein contents in the early lactation stages were higher in...
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Managing Dairy Cows in an Extreme Warm Environment – an Israeli's Perspective. Real Science Lecture
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Until recently there has not been a significant push to supplement B vitamins in dairy cow diets since they are known to be synthesized in large amounts in a cow's rumen.
It has been recognized for many years that B vitamins are essential for various aspects of a cow's metabolism, her overall health and milk production.
As milk production per cow has increased over the years, it may very...
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X-Zelit® contains synthetic zeolite, which binds calcium in the contents of the gastrointestinal tract. The addition of zeolite reduces the quantity of available calcium in feed, thus stimulating the cow's own hormone system to uptake calcium from its bones. This boosts the cow's blood calcium content at the start of milk production just after calving and it strengthens the cow's ability to utilise the...
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NOREL recently organized a pair of technical conferences on ruminant feeding that took place on April 6 at the School of Agronomy, University of Lerida and on April 7 at the School of Agriculture of the Polytechnic University of Madrid. Over 150 people attended.
The topics were current indicators and nutritional tools in the feeding of beef and dairy cattle; in addition, current production parameters were reviewed as were...
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Dear Users, This is an interesting forum from our Spanish community, generated by Joaquin A. Paulino from República Dominicana: Feeding and management of high producing dairy cows is a challenge in any area of the world regardless of the type of food or facilities available. The high producing cows can vary their milk production from one area to another. Some breeds produce more milk than others and in each breed animals are more productive than others. A high...
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We are sciencing the global food challenge - Because it's all about life | Evonik
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Dear all
As we all know about thereats of FMD to the dairy animals and its impact on dairy balance sheet and as dairy industry is turned towards new achievements including automizations and dairy softwares.but still there is a feeling of question mark regarding FMD.my question arises that can we erradicate it worldwide?or what are those preventive measures that can be beneficial for a dairy farm or that can cover a large area?
Waiting for your expert opinion.
Dr.Durgesh...
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What is the best feeding alternative for dry cows? What we can do in transition period to prevent acidosis, ketosis and fatty liver syndrome of milking cows in early lactation period? ...
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Managing Dairy Cows in an Extreme Warm Environment – an Israeli's Perspective. Real Science Lecture
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Dear Seniors please guid me what type of water required to get maximum yeild of milk from cattle (Cross bred). Can some body guide me that what should be the PH, EC, chloride,calcium,magnessium,carbonates etc for a cattle drinking water to get maximum result. ...
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What is the ideal RDP and RUP ratio in high yield lactating cows? can we increase dry matter intake and milk yield by increasing RUP ratio in TMR? ...
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how we improve the milk production of local cross fresion cows? how we formulate their feed? ...
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In ruminants, live yeast has positive effects: it increases cellulolytic bacteria growth (improves ruminal degradation of dry matter), reduces acidosis incidence by keeping ruminal pH stable and improves the use of feed (starch and cellulose). This improves growing conditions for lambs, increasing nutrient availability in milk. It also improves nitrogen fixation as bacterial protein and essential amino acids by stimulating microbial synthesis. In a trial carried...
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We are sciencing the global food challenge - Because it's all about life | Evonik
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Dear All can you please guide me how to formulate ecomincal feed ration for milking cows b using corn silage. Average Wieght of cows 475kg Average lacation Secondl Cross breed ( Holstin+Sahiwal ) Prduction Goal 20 litres regard ...
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Introduction Previous studies (Busquet et al., 2005; Calsamiglia et al., 2007) have shown that garlic oil (GO) supplementation to in vitro cultures of ruminal micro-organisms leads to reduced methane production and acetate:propionate ratios, but the effects are related to the dose. Our hypothesis was that GO effects might depend on the rumen microbial populations, and thus on both the incubated substrate and the type of diet fed to donor animals. The aim of this study was...
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