Pay attention to environment and ignore feed in summer high-twist and high-yield feeding techniques in summer

In summer, cow management is mainly based on the principle of preventing heat and cooling and alleviating the harm of high temperature and humidity to dairy cows, but most of them only pay attention to the regulation and control of breeding environment, ignoring the improvement of feed structure and feeding technology, affecting milk production of dairy cows.

Cow

1. Feed

In summer, dairy cows lose their appetite and feed intake, resulting in malnutrition and a decline in milk production. It was determined that the feed intake of dairy cows began to decline at 22-25 ℃ and decreased by up to 40% at 30 ℃. Therefore, during this period, we should focus on improving the appetite of dairy cows, adding some palatable and digestible feed such as alfalfa hay, carrots, shredded beet and so on, and adding some rumen fat substances such as calcium fatty acid, whole cottonseed and so on. The fat content in the diet can account for 5%-7% to meet the nutritional needs of dairy cows.

two。 Feeding method

Higher temperature is easy to make feed fermentation rancidity, so feed cows need to be fed less frequently. Cows in the peak lactation period should be fed 1 kg 1.5 kg concentrate per 100 kg body weight in summer and fed 4 times a day, and the green succulent feed can be fed to 35 kg 45 kg per day.

3. time

In terms of feeding time, the relatively low temperature of the day should be selected to increase the amount of feed at night. From 8 pm to 8 am the next day, the amount of feed can account for 60%-70% of the total diet, so as to ensure that dairy cows get enough nutrients every day to give full play to their milk production potential.

4. Drinking water

In summer, dairy cows should be guaranteed to drink clean and sufficient cool drinking water, and the frequency of drinking water should be increased accordingly. The best water temperature is 10: 15 ℃.

5. Additive.

In summer, the increase in breathing and sweating of dairy cows will lead to mineral deficiency, so minerals such as potassium, sodium, magnesium, calcium and phosphorus should be added to the diet. Potassium can be increased to 0.8%-1.3%, sodium 0.5% and magnesium 0.3%. The results showed that adding 5 mg potassium iodide to the daily diet of each cow in summer could greatly reduce the heat stress and increase the milk yield by 24%. In addition, if 0.1%-0.2% methionine is added to the feed, the milk yield of dairy cows can be increased by 15%-24%. Urea phosphate is a new type of accelerant used in ruminants such as cattle and sheep. 150 grams of urea phosphate is fed to each cow every day, the daily milk yield is increased by 1.33 kg, the daily gain is increased by 10%, and the feed conversion rate is increased by 8%.