The high temperature in summer, the pig's subcutaneous fat is relatively thick, poor ability to regulate body temperature, especially pregnant sows, if not properly managed, it is likely to cause abnormal growth of piglets, and even lead to miscarriage. Recently, the reporter interviewed a member of the expert advisory group of the newspaper and Yang Heping, professor of animal engineering branch of Yangling Vocational and Technical College, on how to raise and manage pregnant pigs in the summer.
Pregnant sow rearing
From the perspective of promoting fetal development, the amount of feed during pregnancy should be reduced, so that the weight gain of pregnancy is controlled at 30-40 kg; and the nutritional level during lactation is increased. Pre-pregnancy was fed with coarse raw materials in the early stages, and during the later stages of pregnancy, the concentrate was fed to raise the nutritional level. The specific formula for concentrates is: corn 45%, wheat 14%, beans 5%, wheat bran 10%, fish meal 1.5%, bone meal 2%, grass powder 13%, cottonseed cake 8%, growth hormone 1%, salt 0.5 %. Yang Heping emphasized that for pregnant pigs, the diet requires 12% of crude protein, 0.6% of calcium, and 0.5% of phosphorus. This diet is fed at 1.3 kg per day in the first trimester of pregnancy and 2.5 to 3 kg at the end of pregnancy. The amount of the diet can be flexibly controlled according to the weight of the sow and the climatic conditions to maintain a body condition that is neither too thin nor fat.
Management of pregnant sows
Pregnant sows are best to grazing for 1 to 2 hours a day in the summer, or 2 to 3 hours of free exercise on the big sports grounds to enhance their physical fitness so that they can deliver well, reduce stillbirths, and prevent sows from colliding and biting. Causes mechanical abortion.
On the one hand, pig farmers must adopt measures to prevent heatstroke during the summer. On the one hand, they must avoid feeding moldy and poisonous feeds.
Yang Heping reminded farmers that they must prepare for pre-production and be skilled in calculating the expected date of delivery. There are two methods for calculating the expected date of birth: The first is the "3, 3, and 3 methods," which is to add 3 months plus 3 weeks plus 3 days on the breeding date; the second is the "6 months minus" method, that is, the date of mating. Adding 4 months to 6 days is the due date.
YT-60
YT-60
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