In cattle feed, the concentrate mixture made by mixing concentrated feed and energy feed in a certain proportion is a half-day feed, and cattle and other ruminants cannot rely on pure feed to meet their normal growth. The production needs must also be fed with a certain amount of green fodder, green, succulent feed, and roughage, etc., to constitute a ruminant full-day food-type compound feed in order to complete its normal growth and production. Therefore, on the one hand, the requirements for nutrient requirements such as animal species and breeds, physiological stages of animals, and animal weight should be taken into account when making concentrates. At the same time, green feed, roughage, and greens commonly used in different seasons and different feeding conditions must be mastered. The average value of nutrient content in succulent feed, etc. is based on the preparation of full-day food, with a good mix of concentrates.

According to the growth law of beef cattle, the whole growth process is divided into two periods, namely the growth period and the fattening period. The nutrition of beef cattle is different at different periods.

During the growing period, beef cattle grow rapidly, and protein metabolism is high. There are many protein, moisture, and mineral deposits in the body, but less deposited fat. During the growing season, due to high nutritional levels and rapid development of various organs, adequate supply of nutrients should be ensured, especially protein, minerals and vitamins. In general, the crude protein content of the diet during this period is 14% to 19%, the total digestible nutrients 68% to 70%, the feed intake of the concentrate is controlled at 1.2% to 1.5% of the body weight of the cattle, and the roughage feeds freely, and the daily gain is 0.7. ~ 0.8 kg. Corn silage is a good feed for growing calves.苜蓿 It is beneficial to the formation of beef marble meat.

During the fattening period, the nutritional characteristics are low protein and high energy to meet the needs of the deposition of muscle fat and the formation of marble meat. In the early period of fattening, the restrictions on rearing led to the maximum growth of the muscles. The fine material was controlled at 1.7%-1.8% of the body weight, the roughage was free to eat, generally accounted for 57%-49% of the total food intake, and the silage accounted for the daily intake 28 %-24%, so that beef cattle gain up to 1 kg. During the fattening period, when the beef cattle diet contains 30% green straw, it has no effect on production. For example, when the straw content exceeds 45%, the production performance is reduced, the slaughtering period is prolonged, and the slaughter performance is reduced. In the late period of fattening, all feeds are free to feed, and special feeds should be added. In this period, fine feed intake generally accounts for about 1.8% of the weight of cattle, and roughage feed intake accounts for 34.6%-31% of daily feed intake. The beef cattle gain 0.7-0.8 kilograms a day for the purpose of improving muscles and marbles, improving beef quality, and producing high-grade beef.

Beef cattle grow fast during this period, and it needs more nutrition. The nutrition of minerals, vitamins and trace elements is very important for beef cattle. Such as trace elements, although the requirement is extremely low, but the physiological function in animals is irreplaceable. Studies have shown that lack of trace elements in beef cattle, from the growth inhibition, skeletal malformations and reproductive dysfunction, etc., but the weight caused by death.

In cattle feed, the concentrate mixture made by mixing concentrated feed and energy feed in a certain proportion is a half-day feed, and cattle and other ruminants cannot rely on pure feed to meet their normal growth. The production needs must also be fed with a certain amount of green fodder, green, succulent feed, and roughage, etc., to constitute a ruminant full-day food-type compound feed in order to complete its normal growth and production. Therefore, on the one hand, the requirements for nutrient requirements such as animal species and breeds, physiological stages of animals, and animal weight should be taken into account when making concentrates. At the same time, green feed, roughage, and greens commonly used in different seasons and different feeding conditions must be mastered. The average value of nutrient content in succulent feed, etc. is based on the preparation of full-day food, with a good mix of concentrates.

According to the growth law of beef cattle, the whole growth process is divided into two periods, namely the growth period and the fattening period. The nutrition of beef cattle is different at different periods.

During the growing period, beef cattle grow rapidly, and protein metabolism is high. There are many protein, moisture, and mineral deposits in the body, but less deposited fat. During the growing season, due to high nutritional levels and rapid development of various organs, adequate supply of nutrients should be ensured, especially protein, minerals and vitamins. In general, the crude protein content of the diet during this period is 14% to 19%, the total digestible nutrients 68% to 70%, the feed intake of the concentrate is controlled at 1.2% to 1.5% of the body weight of the cattle, and the roughage feeds freely, and the daily gain is 0.7. ~ 0.8 kg. Corn silage is a good feed for growing calves.苜蓿 It is beneficial to the formation of beef marble meat.

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