The development of normal, healthy and healthy breeding cattle is the basis for improving the quality of cattle, timely breeding, and ensuring the high yield of dairy cows. After weaning calves rarely have health problems, what needs to be determined is to feed the most economical energy, protein, minerals, and vitamins to meet animal needs and achieve ideal growth rates. Nutritional requirements and feed intake change over time. Young heifers less than 1 year old need high nutrient feed due to limited rumen volume, so only moderate growth rates can be maintained if only roughages are fed. Diets for young heifers Grain feed or concentrate ingredients should be included, but young heifers older than 1 year may not necessarily have this requirement. Some farms feed young heifers with diet formulas that are not consumed by cows (refusing to feed). The composition of such diet formulas is usually high-fiber, low-protein and can be used to feed a half-year-old young heifer as long as the formula has a proper nutritional balance and palatability. After weaning, young heifers may be grouped in captivity. Each group begins with a smaller number and is grouped mainly based on the nutritional requirements of the animals. The size and number of animals in each group also depends on the number of herds and the availability of livestock. Considering age, heavier heifers should also be grouped together in the same group. l. Rearing of post-weaning calves (2 to 5 months) Place 1 group (4 to 6 heads) of weaned calves of similar size to one corral and maintain the same characteristics as the individual pens, ie clean and Dry mat grass, well ventilated, easy to drink and feed. This sort of corral is called a transitional corral. It is very important to have enough management space for all calves to feed at the same time. It is important to avoid calves from catching food because the space is too small. The diet of young heifers that are usually 2 to 5 months old should contain 40% to 80% of roughage. With the growth of young heifers, the protein content in the diet can be reduced to increase the fiber (neutral detergent fiber). content. The diet of young heifers 2 to 5 months old should not contain low-quality roughage. If younger heifers are fed with low-quality roughage, the amount of concentrate should be sufficient. And minerals. The percentage of crude protein contained in concentrates depends primarily on the crude protein content of the roughage in the diet. In general, a mixture of concentrates used to feed young heifers contains 16% crude protein to meet their needs. 2.7 to 12 months old bred bred cattle breeding fastest period of development, the young heifers in this period can have 10 to 20 heads per group, the maximum difference in weight of a group of heifers should not exceed 70 to 90 kg, should Careful recording of feed intake and growth rate, as excessive weight gain during this period may affect future milk production capacity, in contrast, underweight will delay puberty, breeding and first calving, monitoring young heifers Body height, body weight, and body lick scores help evaluate this period of feeding. Feeding standard: 112 months old and weighing 280-300 kg: 2 fine material: 2-2,5 kg; 8 rough material: silage 10-15 kg, hay 2-2.5 kg; DM 5-7 kg, crude protein 600-650 grams, calcium 30-32 grams, phosphorus 20-22 grams. Preventing feeding too much nutrients makes the cow fat. 3. The rumen of young heifers that have been raised for 13 months or more in breeding cows aged 13-17 months is fully functional. Young cows in this age group are grouped based on estrus identification and breeding. The maximum change in cow weight should not exceed 130. kilogram. Feeding high quality roughage at this stage can also meet normal growth needs. Actually, high-energy roughage such as corn silage should be fed in limited amounts because these young heifers may cause obesity due to overfeeding. Corn silage and legumes or well-developed forage mixed feed can provide sufficient energy for dairy cows. And protein, concentrates should mainly be used as dietary ingredients to supplement low quality roughage. Feeding standards: 1 body weight should reach 400 to 420 kilograms; 2 concentrates: 3 to 3.5 kilograms; 8 coarse material: silage 15 to 20 kilograms, hay 2.5 to 3.0 kilograms; 4 dietary nutrient needs: NNDl15, DM6~ 7 kg, crude protein 640-720 g, calcium 35-38 g. 24 to 25 grams of phosphorus. 4.17-month-old-to-first-breed cattle breeding Feeding and growth rates of young cows during this period must be recorded in order to obtain ideal body height, weight, and body mass at delivery. The feeding schedule should be adjusted 1 to 2 months before the cow is delivered to prepare for the delivery of the young cows and the first lactation. The proportion of concentrate feeds should be gradually increased in the feed to these young cows to ensure a smooth transition and after delivery. As soon as possible to promote the intake of large amounts of dry matter. It is important to avoid inappropriate physical balance (low or high scores) during childbirth. Overweight or obese young cows are more prone to dystocia and postpartum syndrome. Late pregnancy is not the period of physique adjustment, but the preparation period of early lactation stress in young cows. Young cows in this period have low requirements for livestock houses and are flexible in feeding plans, and can also be grazing and rearing. A few days before delivery, the first and the lactating cows can be put together in the milking room to assist the young cows to adapt to the routine squeezing procedures. After the delivery, the first-born cows should be placed in separate groups as much as possible, if they are placed on the older cows. Together may produce stress reactions. Feeding standards: 1 Weight: 500-520 kg; 2 Concentrate: 3 to 3.5 kg: 8 Crude material: Silage 15 to 20 kg; Hay 2.5 to 3.0 kg: 4 dietary nutrition requirements: NNDl 20-20; DM 7- 9 kg: Crude protein 750-850 g; calcium 45-47 g; phosphorus 32-34 g. It must be noted that cows are obese and are prone to dystocia or other diseases; from the time of pregnancy, control feeding. Dried Squids,Dried Cuttlefish,Dehydrated Squid,Dry Calamari Zhoushan Fudan Tourism CO., LTD , https://www.fudanfood.com