色欲综合久久躁天天躁_亚洲欧美另类激情综合区蜜芽_久久99国产综合精品女同_最近最好的2019中文日本字幕

In modern pig industry, even if all kinds of cold and heatstroke prevention designs are adopted in pig house design and construction, it is still not enough to obtain the appropriate temperature of pig. Scientific heating and cooling facilities and control system must be adopted to carry out more accurate manual control of pig house, so as to achieve the ideal temperature control effect. The temperature control of pigsty is a systematic project, which needs to be optimized from site selection, orientation, selection of thermal insulation building materials, roof design, wall design, door and window design, span, ground design and other aspects, so as to achieve the ideal effect. Many farm owners may think that a large amount of investment is needed in temperature control, in fact, as long as scientific and reasonable methods are adopted And design, its cost will not be higher than the current traditional pig house, on the contrary, it can also be reduced. The following is a specific introduction of the temperature on the pig what is the impact.
1、 Effect of temperature on Piglets
When piglets are exposed to low temperature, they are prone to diarrhea, cold shock and other diseases, resulting in insufficient resistance and death.
2、 The effect of temperature on the reproduction of breeding pigs
Compared with the young pigs, the sows are generally large and fat, and they have strong tolerance to low temperature, but poor tolerance to high temperature. The suitable temperature of sows is 18 ℃ ~ 25 ℃. When the ambient temperature is higher than 25 ℃, sows will have heat stress reaction. When the temperature is higher than 28 ℃, the feed intake of sows will decrease by 0.4 ~ 0.5 kg per day for every 1 ℃ rise, which will significantly reduce the lactation of sows, thus reducing the growth performance of piglets and the immunity to diseases. In the high temperature environment, boars mainly show low libido, decreased sperm density and quality.
3、 Effect of temperature on the growth performance of growing and finishing pigs
The main effects of temperature on growing and finishing pigs include feed intake, growth speed, feed to weight ratio, health level and other aspects, of which the impact of feed to weight ratio is also concerned by the farms, too high or too low temperature will have a negative impact on feed to weight ratio.