The main factors affecting the fattening effect of fattening pigs

There are many factors affecting pig fattening by   , which are not only related to each other but also influence each other. In essence, it can be divided into two aspects: heredity and environment, including breed and type, law of growth and development, early maturity and so on, while feed, feeding level, environmental conditions of pig house and health status of pig herd belong to environmental factors.

Effects of    breeds and types on the effect of finishing Pigs

The breeds and types of    pigs have a great influence on pig fattening, because the growth and development rules of different breeds of pigs are different.

The nutrition standard and diet quantity are different at different stages of the fattening period. Introduced breeds, such as large White pig, Landrace pig, Duroc pig, Hampshire pig and so on. It belongs to lean pig. Under the condition of fine feed and high nutrition level, the fattening result was better, fattening faster and fattening time shorter than that of local breeds. However, under the condition of medium and low nutrition level of green roughage, the weight gain rate of foreign varieties is not as fast as that of local varieties, and the fattening effect is also investigated, so different fattening methods should be adopted for different breeds and types of pigs in order to improve the fattening effect.

Effect of    (II) Hybridization on fattening performance of Pigs

   using heterosis is one of the effective measures to improve the effect of fattening pigs. Because the hybrid progeny has strong vitality, rapid growth and development, high daily weight gain, and improve feed utilization rate and reduce feeding cost. However, the decisive factor for the fattening effect is the effective hybrid combination, generally using foreign breeds as male parents and Chinese local pig breeds as female parents, the dominant rate of weight gain rate of offspring is 10%-20%, and the dominant rate of feed utilization is 5%-10%. Practice has proved that the cross of three varieties is better than two varieties.

   (3) effects of gender and castration on fattening effect of pigs

The sex and castration of    have certain influence on the fattening effect. The practice proved that the castrated sows had faster weight gain, higher feed utilization rate, enhanced fat deposition, improved meat quality, docile temperament and increased appetite than uncastrated sows. After castration, the sexual function of pigs disappeared, the process of alienation was weakened, the process of assimilation was enhanced, and more of the nutrients absorbed could be transformed into fattening and gaining weight. It is reported that the weight gain rate of castrated boars is 10% higher than that of uncastrated boars, and the fat content of castrated sows is 7. 5% higher than that of uncastrated sows.

6%, feed utilization rate and slaughtering rate are higher than those that can not be castrated. Some foreign varieties or cultivated varieties

Because the sexual maturity is relatively late, the sows have little effect on fattening, so they only castrate the boars but not the sows when fattening. In recent years, with the development of pig science and technology, the fattening period of pigs has been shortened. It is considered that the weight gain rate, feed utilization and carcass lean percentage of young boars without castration are better than those of castrated boars and sows, which is beneficial to reduce the production cost.

   (4) effects of birth weight and weaning weight on fattening effect of pigs

   under normal circumstances, the greater the birth weight of piglets, the stronger the vitality, the faster the growth rate, and the greater the weaning weight.

The greater the weaning weight, the faster the fattening gain, the less feed consumption, the better the fattening effect. As the temperature increases, feed intake decreases, feed utilization rate and daily increment decrease. Generally speaking, each fattening pig covers an area of 0.8 square meters. Too little also has an impact on pig fertilizer, especially in winter, where heat dissipates quickly, maintenance needs to be increased, and extra feed is wasted. In addition, the disease has different effects on fattening pigs directly or indirectly. So in the process of fattening pigs. We should create good environmental conditions for pigs and strive to eliminate various factors that are not conducive to pig fattening in order to achieve the ideal fattening effect.