feed. In summer, the appetite of dairy cows decreased, and the feed intake decreased, resulting in a decrease in milk production. The feed intake of dairy cows began to decrease at 22-25Â°C, and decreased by 40% at 30Â°C. Therefore, summer should be focused on improving the appetite of dairy cows, and feeding feeds such as hay, carrots, and beets must be fed with good palatability and digestibility. Fatty acid calcium can be added to the feed, and whole-grain cottonseeds, etc., can pass through the rumen fat, and the fat content in the diet can reach 5% to 7%. The summer diet should be small and high in concentration.
Hello method. Higher temperatures can easily lead to rancidity and deterioration of the feed, and less feeding should be added to the feeding method. Dairy cows during the lactation period eat 1 kg to 1.5 kg of fine material per 100 kg of body weight in the summer and 4 times per day. The green and blue succulent feeds are fed from 35 kg to 45 kg per day.
time. You should choose to increase the amount of feed at night when the temperature is lower. From 20:00 pm to 8:00 the next day, the amount of feed can account for 60% to 70% of the daily diet.
Drinking water. In the summer, it is necessary to ensure that the cows drink clean and adequate drinking water and increase the number of drinking water. The water temperature is best at 10-15Â°C.
additive. In summer, due to increased breathing and perspiration, mineral intake is often insufficient. Therefore, potassium, calcium, sodium, magnesium, phosphorus, and other minerals should be added to the diet. Potassium can be increased to account for 0.8% to 1.3% of dietary dry matter, sodium 0.5%, and magnesium 0.3%. Tests have shown that each cow feeds 5 mg of potassium iodide each day during the summer, which can greatly reduce the impact of heat stress on dairy cows and increase milk production by 24%. In addition, if 0.1% to 0.2% methionine is added to the diet, milk production can be increased by 15% to 24%, and the feed conversion ratio can be increased by more than 100%, ie, 1 kg to 2 kg of methionine per ton of feed can be saved, saving 100%. Kilo with feed. Urea phosphate is a new prolonging agent for domestic ruminants such as cattle and sheep. For example, supplementing 150 g per cow per day increases daily milk production by 1.33 kg, and increases daily gain and feed conversion by 10% and 8%, respectively.
Author: Wangzhuang Town, Chengcheng County, Shaanxi Province Mink Aquaculture Association
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