In the daily feeding and management of dairy cows, such as the lack of chloride ions in the diet, the body's metabolism will be disturbed, causing the cow's physiological function to lose balance, resulting in the cows' mineral imbalance, low dry matter digestibility and loss of appetite. A series of problems such as weight loss and decreased milk production have caused huge losses to dairy farmers. According to the New Zealand pasture survey results, the lack of salt (sodium) is the main reason for the reduction of milk production in most farms. Dr. Clive Philipss and Dr. Paul Chiy, of the Department of Clinical Veterinary Medicine at the University of Cambridge in the United Kingdom, have demonstrated that salt supplementation can increase milk production compared to other nutrient supplements.
Adding salt to your diet has two major implications:
(1) Improve rumen digestibility: The increased sodium content in the diet can adjust the pH of the stomach, increasing cellulose and acetic acid bacteria to aid digestion. Therefore, these are prerequisites for increasing milk production.
(2) To increase the level of water-soluble carbohydrates, the presence of salt can be beneficial to the digestion of forage grass and can absorb more beneficial bacteria in the stomach. This means that the more forage grasses the cow digests, the more beneficial the salt intake is and the higher the utilization rate.
Therefore, in order to guarantee the health of dairy cows during production, dairy cows need to produce more milk, in addition to feeding high-protein concentrates, they should also add a certain amount (1.8% to 2.4% of the dry weight of feed) to the feed. The salt, to meet the cow's body's need for chloride ions, wells can increase milk production by about 15%.
However, if blindly raising the level of salt in feed, animals will be in danger of excessive salt intake, so the free choice of salt source is very important. The relevant data shows that when animals take too much salt, the content of salt in feed increases by 1%-2%, which will lead to increased drinking water and urine output will increase by 23%. Due to the differences in individual animals, even if the salt content is accurately calculated, it will not be able to make up for the lack of animal salt intake. This is also the importance and necessity of adding individual salt to the daily feed.
At the same time, it is necessary to ensure that the cows have sufficient drinking water. Otherwise, the cows will reduce their appetite, slow digestion, and affect milk production. Insufficient long-term drinking water will also lead to metabolic disorders of dairy cows, reduced resistance to diseases, and death in severe cases. Water is not only an indispensable important substance in the metabolism of dairy cows, but also has the effect of regulating body temperature. Drinking water can be supplied at 3-5 times the daily milk production, even more in the summer, and the drinking water should be kept fresh and clean. In winter, it is best to drink warm water close to body temperature.
As a freely selectable salt source, the following conditions must be met: strong environmental resistance; always easy to feed; do not use any flavor enhancer and flavor attractant; the highest quality mineral (GMP+); %-20% of average need. Only by adopting correct and reasonable methods to compensate for insufficient salt intake in daily feed can we better improve the milk production of dairy cows.
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