Sow reproductive performance is central to pig production and directly affects a farm’s economic returns. Autumn weather changes pose a series of challenges to sow reproductive performance. How to address these challenges and ensure normal reproduction in sows is an issue that pig producers must face.
The importance of sow reproductive performance
Sow reproductive performance refers to a sow’s ability to produce offspring and includes several stages, such as estrus, mating, pregnancy, farrowing, and lactation. The level of a sow’s reproductive performance directly affects the pig farm’s farrowing rate, survival rate, and growth rate, and is a key factor in the economic efficiency of pig production.
Autumn climate characteristics
As autumn temperatures gradually drop, the difference between daytime and nighttime temperatures increases, precipitation decreases, humidity falls, and daylight hours shorten. These climatic conditions can have some impact on sows’ physiological activity and reproductive performance.
The effects of autumn temperature changes on sows
As temperatures gradually drop in autumn, sows’ ability to regulate their body temperature declines, making them more susceptible to cold stress, which can affect appetite and reproductive performance.
In low-temperature environments, sows consume more energy to maintain their body temperature, leading to reduced feed intake and affecting nutrient intake, which is unfavorable for follicular development and the implantation of fertilized eggs. Low temperatures may also weaken sows’ immunity, making them more susceptible to illness and affecting their health, which in turn affects reproductive performance.
Effects of seasonal humidity changes on sows
As humidity decreases in autumn, the air becomes dry, which can easily cause respiratory diseases in sows. Low humidity can also affect the health of sows’ skin and coat, causing problems such as dry, flaky, and itchy skin.
● Respiratory diseases: Dry air can easily dry out the respiratory mucosa of sows, reducing their resistance and making them more susceptible to respiratory diseases such as bronchitis and pneumonia.
● Skin problems: Low humidity can also affect the skin and hair health of sows, causing problems such as dry, flaky, itchy skin and affecting their comfort and overall health.
The effects of seasonal changes in light exposure on sows
In autumn, daylight hours shorten and light intensity decreases, which can affect sows’ endocrine systems, lengthen their estrous cycles, and reduce conception rates after breeding.
● Prolonged estrous cycle: Shorter light exposure can affect melatonin secretion in sows. Melatonin is a hormone that suppresses estrus. Shorter light exposure increases melatonin secretion, leading to a prolonged estrous cycle.
● Decreased conception rate after breeding: Shorter daylight hours can also affect the secretion of gonadotropins in sows. Gonadotropins are hormones that promote follicle development and ovulation. Shorter daylight hours reduce gonadotropin secretion, leading to a lower conception rate after breeding.
The impact of autumn climate changes on sow feed intake
Factors such as falling temperatures, lower humidity, and shorter daylight hours in autumn can lead to reduced appetite and feed intake in sows.
● Temperature drop: To maintain their body temperature, sows consume more energy, leading to a decrease in feed intake.
● Humidity reduction: Reduced humidity can affect sows’ respiratory health, leading to decreased appetite and reduced feed intake.
● Shortened lighting time: Shortened lighting time can affect the sow’s endocrine system, leading to reduced appetite and lower feed intake.