The growth and development of cattle and the degree of demand for nutrition are also different. Therefore, the appropriate fattening method should be selected according to the age of fattening cattle. First, bred cattle fattening Generally, the bull is 1-2 years old, the cow is 2-3 years old and the weight is 400-450 kilograms, and the fattening period is 300-360 days. The average daily weight gain is 0.7-0.8 kilograms and the slaughter weight is 600-700 kilograms. During the fattening period of the cattle, it is during the period of rapid growth and development of muscles and fats that the fattening of the beef is synchronized with the growth and development of the body. Therefore, the fattened cattle have good meat quality and high value. Technically, according to the specific situation, the medium-and-late-term feeding standard and feeding and management program can be selected based on the precise fat-feeding method and the pre-rough post-finishing fertilizer method. Second, adult cattle fattening Bulls 2-3 years old, cows 3-6 years old, weighing 340-420 kilograms began fattening; fattening period 150-180 days; average daily gain 1.0-1.1 kilograms, slaughter weight 550-600 kilograms. The fattening of the fattening cattle has ended, but the weight of muscle and fat is increased after a short-term fattening. Generally, low-nutrient rearing is mainly adopted for roughage feed of mature cattle, so the fattening period can exert the advantages of compensatory growth and increase the speed of weight gain. Mature cattle fattening has the characteristics of rapid weight gain and high feed conversion rate. The fattening technology can be selected according to the specific circumstances of the former after the coarse fattening methods, feeding programs in the later period, the main fat-based fattening methods, rear feeding programs. Three, yak fattening Weaning yak weighing 200-280 kilograms began to be fattened. The fattening period was 330-360 days, and the slaughter weight was 500-600 kilograms. The average daily weight gain was 0.8 kilograms. The yak fattening is fast and the meat quality is good, but the fattening period is long and the fattening cost is high. According to the specific conditions, any one of the fattening methods mainly based on the fine material and the coarse and fine later material may be selected. IV. Eliminate fattening cattle The average age of 8 years or more and the body weight of 350 kg or more began to grow. The fattening period was about 100 days. The slaughter weight was over 450 kg, and the average daily gain was 1.0 kg. Although the fattening cattle have poor meat quality, the weight gain is generally faster. Ageing out of cattle by fattening can increase its economic value. The fattening technique can be used to select the fattening scheme for the pre-coarse and post-fermentation methods.
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dizziness and restlessness.
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of human survival.
• Benefits of Oxygen:
Inhalation of oxygen can improve the level of arterial blood oxygen partial pressure and oxygen
saturation of the body, in addition to promote the metabolism of the body, and is also one of the very
important methods for auxiliary treatment of a variety of diseases. Oxygen inhalation can make the
oxygen in the human tissue more abundant, cells will get sufficient oxygen supply after the
metabolism will be more active, normal people will have a refreshed, memory improved, spirit feeling.
Patients with chronic heart and lung diseases, long-term oxygen inhalation can delay the aggravation
of the disease, at the same time, but also can relieve the symptoms of chest tightness, wheezing and
dyspnea of patients. Especially when working under great pressure, they are prone to dizziness,
