In the fast fattening of beef cattle, it is the premise to do a good fattening job for beef cattle, and it is also an important part to obtain higher economic benefits. Let's talk about the purchase of shelf cattle. The first thing to consider when choosing a shelf cow is to consider the variety. Different varieties, the difference in weight gain on the shelf cattle is quite obvious. Meat crossbred cattle have good meat production performance, rapid weight gain, and high efficiency. Under the same feeding and management conditions, the daily weight gain of beef hybrid cattle was more than 2 kg, while that of local cattle was only 1-1.25 kg, and the daily weight gain of cross-breeding backcross cattle was between the two. Therefore, we must do a good job of beef fattening and raise the economic efficiency of fattening. We mainly purchase the first- and second-generation hybrid cattle or three-way hybrid offspring that are obtained by cross-breeding beef cattle breeds such as Charolais, Simmental and Limousin with local yellow cattle. Fattening instead of returning cattle and local yellow cattle for fattening. The influence of gender on the rate of weight gain is also extremely significant. Under the same husbandry and management conditions, as the testosterone is contained in the body of the bull, the weight gain is the fastest, followed by the blind bull and the cow the slowest. In general, the bull gains more than 10% of the bull, and the bull is 10% higher than the cow. Therefore, to develop fast beef fattening, we must buy bulls instead of bulls and cows. Age and weight are also important factors to consider when purchasing shelf cattle. At present, under the relatively extensive feeding and management conditions in our country's vast farming and pastoral areas, 1.5 to 2 year-old meat hybrid cattle have a body weight of 250-300 kg. With such cattle fattening, the flesh and bones grow together, the daily weight gain is slower, and the economic benefit is lower. 3 to 5 years old shelf cattle, weighing more than 350 to 400 kg, fattening is mainly long meat, after 60 to 90 days of fast fattening weight up to 500 kg can be slaughtered, each profit can be more than 300 yuan, considerable economic benefits. Over 7 years of old cattle, due to weakened digestive function and low feed utilization, are generally not suitable for fattening. In order to produce high-grade beef, under the premise of linear fattening of yaks, it is possible to purchase rack cattle from 1 to 1.5 years old and weighing 250 kg or more, and after about 4 months of strength growth, the body weight will reach 500 kg by the age of 2 years. Slaughter is the source of high-grade beef. It can not only increase the slaughter rate, but also greatly increase the economic benefits of raising cattle. When purchasing rack cattle, pay special attention to the health of cattle. To buy a tall, good growth, healthy disease-free shelf cattle for fattening. You can't buy a cow that is painful and has iron artifacts in the stomach and is not easy to cure in a short period of time. When buying cows, you can often see some rough coats and poorly-emotional cattle being sold in the market. Observe the ruminants and excrement etc. of these cattle carefully, and talk with the livestock owners to find out the cause of poor publicity. After analysis and judgment, decide whether to purchase. For cows that have poor sensation due to improper feeding or management of a parasitic disease, they can be purchased as long as rumination is normal. Through stomach and insect repellent can be cured, fattening can get better economic benefits. The purchase of shelf cows should be based on the region, the province, due to similar feed, climate and other conditions, the cattle quickly adapt after buying back. If you must go to other provinces to purchase, do not pay attention to the purchase of infected areas, so as not to bring back parasites, resulting in economic losses. In addition to taking into account the above factors, the most important thing is to buy a masterpiece that is highly praiseworthy. At present, in the market or cattle-raising households to buy cattle, there is no use of the conditions of the floor scales, and there is no possibility of using body measurements to measure the weight, buy cattle rely on visual assessment of weight. Due to the accurate estimation, whether it is based on live weight or on the basis of meat price, it is impossible to “take off†when buying cows. The purchase of cattle is a comprehensive technology, it requires the buyer must go through many cattle purchase practice to master the excellent skills of cattle. China Agricultural Network Editor