Productive effect of temperature on growing and finishing Pigs

Growing-finishing pigs have certain adaptability to the environmental temperature of piggery, but because of its special sebum characteristics, the way of heat dissipation and body temperature maintenance is relatively simple and simple, too high, too low or alternating cold and hot environmental temperature of piggery will cause respiratory syndrome, poor white diarrhea and other nutritional deficiency diseases in growing-finishing pigs, which seriously affect the production performance of growing-finishing pigs.

Negative effects of summer heat stress on productivity in growing-finishing pigs. Heat stress has a serious effect on producing and finishing pigs. High temperature will cause the decline of feed intake, slow weight gain, and even increase the incidence of acute sudden death syndrome and mortality of producing and finishing pigs, such as gastrointestinal hemorrhage, acute gastric torsion and death caused by acute heart and lung diseases, which will bring great losses to the productivity of producing and finishing pigs. At the same time, the temperature is too high also easy to breed pig house bacteria, so that the incidence of production finishing pigs increased. It has been reported that heat stress has a serious impact on sows, especially on sows with ovarian hypofunction, which is manifested as non-estrus, decreased mating conception rate, increased abortion rate, increased number of stillbirths in late pregnancy and even abortion. Heat stress often leads to litter size and live litter size reduction of 1 - 2 sows. Feed intake of lactating sows decreases, milk production of sows decreases, milk water is insufficient, piglets grow poorly, yellow and white diarrhea and other nutritional deficiency diseases are prone to occur, resulting in low breeding rate of lactating piglets and low weaning weight. Boar sexual desire weakened, ejaculation decreased, sperm motility decreased, viable sperm accounted for the total sperm ratio decreased.

Negative effects of low temperature in piggery on productivity in growing and finishing pigs. In cold season, due to low temperature, productive finishing pigs are prone to various respiratory diseases and intestinal digestive diseases due to their sebum and simplicity of digestive and respiratory systems. Respiratory tract diseases of growing and finishing pigs are easily caused by unstable temperature, dry and wet environment of pigsty and ventilation. The main clinical manifestations are cough, asthma and rapid respiration, low body temperature, intermittent appetite and growth retardation. Some acute respiratory diseases can lead to death. In addition, too low temperature is also easy to cause pig diarrhea, mainly manifested as complex and diverse causes, long duration of disease, different severity of disease, often resulting in mass death of piglets and even nursing piglets, rapid fat loss of growing and finishing pigs, immediate withdrawal (withdrawal) of milk of producing sows, very serious harm, seriously affecting the productivity of finishing pigs.

Finally, cold and heat alternation, temperature fluctuation and instability also affect the productivity of finishing pigs to some extent.