coursera week 5 DAIRY PRODUCTION AND MANAGEMENT
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: coursera week 5 DAIRY PRODUCTION AND MANAGEMENT
coursera week 5 DAIRY PRODUCTION AND MANAGEMENT
Weaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT s - Transferred from the dam these are large proteins found in colostrum that are important in providing immunity from diseasesMilk replacer - Dry feed that contains similar nutrients found in milkFirst calf heifer - Heifer that is calving for the first timeHello, this is Gabriella Varga.And today w coursera week 5 DAIRY PRODUCTION AND MANAGEMENT e will talk about calf nutrition management from the time the calf is born to being weaned off of milk.Calf health, growth, and productivity rely heavcoursera week 5 DAIRY PRODUCTION AND MANAGEMENT
ily on nutrition and management practices.Every heifer calf born on a dairy farm represents an opportunity to maintain or increase herd size, to improWeaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT d minimizing health problems.In this video, we will discuss the development of the calf’s digestive system, learn how important colostrum is for the immune system, and the nutrients the calf needs to be healthy and grow well. From birth to about two weeks of age, the calf is a monogastric, or a simp coursera week 5 DAIRY PRODUCTION AND MANAGEMENT le-stomached animal.The abomasum is the only stomach compartment actively involved in digestion, and milk or milk replacer provides the main nutrientscoursera week 5 DAIRY PRODUCTION AND MANAGEMENT
for the calf. Let's first get acquainted with the calf's anatomy.At birth,the calf's stomach contains the same four compartments found in adult ruminWeaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT an stomach.The objective of calf nutrition is to promote rumen development early in life so that the calf becomes efficient in the absorption of nutrients and has a much smoother transition at weaning.So let’s start at the beginning of the the calf's life, andtalk about how the calf can digest nutri coursera week 5 DAIRY PRODUCTION AND MANAGEMENT ents, such as those that are in milk.At birth, the rumen has little tissue development and lacks a population of microorganisms.The calf depends mainlcoursera week 5 DAIRY PRODUCTION AND MANAGEMENT
y on its digestive enzymes, released primarily from the abomasum and small intestine, that help bring down the fats, non-fiber carbohydrates and proteWeaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT ostrum, their mother's first milk after calving, for about three days after birth. Within ten minutes, a liquid forms a clot in the abomasum due to enzymes and hydrochloric acid acting on casein and fat in the milk.Clotting binds much of the casein and fat into a clump, or a curd, to be digested slo coursera week 5 DAIRY PRODUCTION AND MANAGEMENT wly by stomach enzymes over a period of 12 to 18 hours. Curd development allows for limited meal feeding of calves, compared to other continuous nursicoursera week 5 DAIRY PRODUCTION AND MANAGEMENT
ng species.The fraction of milk that does not form a curd is called whey. Whey is composed of water, minerals, lactose, and other proteins, specificalWeaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT estine, immunoglobulins can be absorbed into the calfs bloodstream. We will discuss the importance of immunoglobulins for the calf in more detail later.The lining of the rumen wall in an adult cow has very pronounced covering of papillae.These papillae are finger-like projections that greatly increa coursera week 5 DAIRY PRODUCTION AND MANAGEMENT se the rumen surface area, the area through which nutrients can be absorbed. Within a few days of binh, the calf's rumen becomes populated with microbcoursera week 5 DAIRY PRODUCTION AND MANAGEMENT
es from feed, the environment in a cow.The papillae development is stimulated by the end products of microbial fermentation.Specifically butyric acid Weaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT ks of age, if the calf is fed only milk, or milk replacer, the rumen will be quite small.As milk, or milk replacer, is fed in increasing amounts, the abomasum grows in size, but the rumen remains proportionally small and grows only moderately. The longer a calf is fed large amounts of liquid feed, t coursera week 5 DAIRY PRODUCTION AND MANAGEMENT he greater the restriction on rumen growth relative to the size of the calf.Lack of lumen development causes a slump in growth rates after weaning. Thcoursera week 5 DAIRY PRODUCTION AND MANAGEMENT
e second aspect of rumen development is the elongation of those rumen papillae and the thickening of rumen walls.Feeding management can drastically afWeaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulins coursera week 5 DAIRY PRODUCTION AND MANAGEMENT ularized rumen wall. Now, compare a third calf fed milk and good quality hay from three days of age. Despite eating moderate amounts of hay, the papillae are not developed at all and the rumen wall is quite thin.This is because the digestion end-products of hay include more acetic acid, which rumen coursera week 5 DAIRY PRODUCTION AND MANAGEMENT walls do not use for papillae growth and development.Calves with access to large amounts of roughage will haveđ considerable increase on rumen size.Weaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulinsWeaning - Removal of milk from the calfRumen Papillae - Projections from the lining of the rumen that allow for absorption of nutrientsImmunoglobulinsGọi ngay
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