Anti-stress agent
Stress refers to a stress response that dairy cows make to adverse stimuli such as transportation, prevention of immunity, high temperature, humidity, cold, calving, and lactation. High-yielding cows are sensitive to stress such as high temperatures, cold, childbirth, and lactation. Therefore, prior to the above-mentioned situation, the contents of trace elements manganese, iron, copper, zinc, iodine, and cobalt that have anti-stress effects in the diet should be increased by approximately one-fold compared with the normal level, which can effectively enhance the resistance of high-yielding dairy cows. Exciting ability. In recent years, studies have found that organic chromium (chromium pyridinecarboxylate) has a good anti-stress effect on high-yielding dairy cows, can also improve energy metabolism, improve the utilization of manganese, iron, copper, zinc, activate a variety of enzymes The activity is suitably added at a concentration of 0.2 mg chromium per kg.
Buffer
For high-yield dairy cows, the intake of concentrate feed during the whole lactation period is relatively large, so it is necessary to add proper amount of baking soda, magnesium oxide and other buffers to the diet to improve the feed intake, milk yield and milk composition of high-yielding dairy cows. Maintain the health of cows, reduce the occurrence of rumen poisoning, and regulate and improve the effect of rumen microbial fermentation.
Baking soda high-producing dairy cows are fed with baking soda during the procreative period, which has a significant effect on the prevention of metabolic diseases such as diabetes and rumen poisoning. In particular, it is better to feed silage and high concentrates all year round. Feeding method: After the calving of dairy cows, start the supplementary feeding, until the end of the lactation period, the amount of supplement is 1.5% to 2% of the concentrate amount, that is, 150 grams to 200 grams of baking soda is mixed into every 10 kilograms of the material, and do not feed .
Magnesium oxide is added at 0.2% to 0.4% of the dry matter weight of the diet or 0.3% to 0.6% of the concentrate feed. It is also possible to mix 2 to 3 parts of sodium bicarbonate with 1 part of magnesium oxide, and add it in an amount of 0.6% to 0.8% of the dry matter of the diet or 1.6% to 2.6% of the amount of the concentrate.
Ectopic acids
The addition of 1% anisotopic acid additives to the high-yield dairy cow concentrates can significantly increase milk yield, and increase milk fat percentage and feed conversion efficiency. Such substances mainly include isovaleric acid, isobutyric acid and isohexanoic acid.
Propylene glycol
The addition or direct feeding of propylene glycols such as propylene glycol, ethylene propylene glycol, and isopropylene glycol in the high-yielding dairy cow diets can effectively reduce and prevent the occurrence of ketosis.
Rare earth
The addition of 40 mg to 45 mg of rare earth to dairy cow concentrates can increase cow milk production by 11% to 15% per day. At the same time, it can increase milk fat percentage, enhance cow disease resistance, and prevent gastrointestinal diseases.
Zeolite
Zeolite is boiling when heated at high temperatures and is called zeolite. For dairy cows, zeolites can adsorb harmful gases in the gastrointestinal tract and slowly release the adsorbed ammonia ions to synthesize bacterial proteins in the rumen, increasing protein production and deposition in the carcasses. In addition, zeolites enhance the body's enzymes and increase the utilization of crude fibers by rumen microorganisms. Adding 4% to 7% of the zeolite in the concentrate of cows can increase the amount of milk by about 8%.
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