For a long time, most of the hay fed to dairy cows in our province is dry corn stalks, which has low nutritional value. Increasing the amount of concentrate feed as a supplement will increase the cost of milk production on the one hand, and disrupt the normal physiology of dairy cows on the other hand. The incidence of metabolic diseases remains high. After investigation in the province, four kinds of high-quality hay were used for dairy cows to produce better results.
Leymus chinensis Leymus chinensis L. has abundant leaves, rich nutrition, and good palatability. Dairy cows like to eat. L. chinensis contains 49.5-85.87 mg of carotene per kilogram of dry matter. Feeding trials showed that each cow fed 15 to 20 kg of Leymus chinensis on a daily basis, in the case of reducing the supply of concentrate feed, milk protein content can still reach 3.2%, milk fat rate was 3.9%, dry matter 12.5% ​​or more. Not only that, but also the incidence of cow diseases such as true gastric transposition and indigestion is greatly reduced. It is generally fed with other forages and has good results. At present, our province's dairy farms purchase the grass of Leymus chinensis. The crude protein content is about 10%, and the price is 1450 yuan/ton.
苜蓿 Hay 1 can increase dry matter intake of dairy cows. The addition of alfalfa hay can increase the dry matter content of the diet by more than 50% without reducing the nutrient content per kilogram of dry matter, thereby effectively increasing the dry matter intake of the cow. 2 can increase the level of crude protein in dairy cows. Cows fed high-quality alfalfa hay with a crude protein content of more than 18% can still achieve a crude protein content of 18% in dairy cows with reduced concentrates. It can not only ensure the protein level required for high-yield dairy cows, but also can reduce the cost increase and induce chronic acidosis caused by too much concentrate input. 3 can improve the structure of dietary fiber and increase milk fat percentage. The neutral detergent fiber content of high-quality alfalfa hay is about 40% of dry matter and 60% lower than that of dry corn straw. Moreover, the level of neutral detergent fiber content matches the needs of dairy cows. Feeding dairy cows with alfalfa hay can significantly increase milk fat percentage. At present, the domestically produced alfalfa hay purchased by dairy farms in our province has a crude protein content of about 18% at a price of 1,800 yuan per ton; imported alfalfa hay has a crude protein content of about 21% at a price of 2,500 yuan per ton.
Peanuts Our province produces 20 million tons of fresh flower oysters and more than 4 million tons of dried peanuts each year. Dried peanuts have crude protein content of 12.2%, calcium content of 2.8%, phosphorus content of 0.1%, lysine content of 0.4%, sulfur-containing amino acid content of 0.27%, crude fiber content of 21.8%, 1 kg of dried peanuts containing digestible protein 70 Grams around. Among them, the crude protein content of peanut pods was 12.9%, crude fat content was 2%, carbohydrate content was 46.8%, and crude leaf protein content was as high as 20%. Peanut pods are not only rich in nutrients, but also soft in texture. Dairy cows like to eat. The superior quality of peanuts and oysters is higher than that of Leymus chinensis, which is slightly inferior to that of sorghum. However, the price is far lower than that of Leymus chinensis and sorghum. Currently, the price of dried peanut pods in our province is RMB 500 per ton.
The land of Guaigua Our province produces 4 million tons of fresh sweet potatoes and 600,000 tons of dried fruits every year. The results showed that the content of crude protein in dry sweet potato was 9.6%, and about 1 kg of dry sweet potato quail contained about 82 grams of digestible protein, 4% of crude fat, 43.6% of carbohydrates, and 8.5% of minerals. The crude protein content is as high as 24%. Dry land melon quail is not only nutritious, but also soft in texture. Dairy cows like to eat. The superior nutritional value of the sweet potato is close to that of the Leymus chinensis, and its price is relatively low. At present, the price of dried quails in our province is 450 yuan/ton.
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