Prevent weight loss
Many production management factors during breastfeeding can be used to reduce weight loss. Increased feed intake appears to be the most obvious solution. However, in many cases this does not seem simple.
The first management step should be the sow room temperature, and the temperature in the farrowing room is generally kept at 23-24°C for piglet growth. However, these temperatures have a negative effect on sow feed intake.
Studies have shown that for every 1°C increase in ambient temperature above 16°C, the sow's feed intake will be reduced by 0.17 kg. Through the setting of the piglet incubator, the temperature of the delivery room is lowered to reach the appropriate ambient temperature of the sow (in the range of 18-20°C), which will increase the sow feed intake without affecting the survival rate of the embryo. At the same time, sow cooling systems such as dripping or snubbing cooling will increase sow feed intake.
Second, clean drinking water should be provided because drinking water and feed intake are closely related. The water flow provided by the spout is preferably maintained at 2.5L per minute. In addition, water quality should be ensured, in particular, the farm has its own wells.
Third, sow rations should be more concentrated while calculating compound conditions based on the endogenous heat generated during digestion.
Reduce the burden during breastfeeding
Another way to reduce weight loss during lactation is to reduce the sow’s lactation burden. The possible method is to reduce the period of breastfeeding, but this may be restrictive in keeping with the animal's physical condition.
Alternatively, the number of suckling pigs can be reduced or fed to piglets. Reducing the number of piglets sucking milk can be achieved by weaning separately, by weaning part of the piglets in the last week of the lactation period, or by intermittently sucking the piglet by intermittently separating the sows and piglets for several hours. This will reduce sucking time and boost intake of piglets.
Many methods stimulate the development of follicles, but it has been found that they have a certain relationship with the role of post-weaning intercourse and loss of body weight.
Chalk feeding piglets can be fed by dry or liquid feed. Dry sap feeding is usually started 4 days after birth, while piglets and their intestines are gradually transitioning from milk to dry feed after weaning. (Studies show that feeding milk milk substitutes can increase piglet growth rate. And reduce sow's lactation weight loss).
Optimized gilt breeding
Cultivating excellent gilts can better withstand weight loss during lactation and also have better reproductive performance throughout the entire lactation period (Clowes et al., 2003; Hoving et al., 2010). . In addition, the feed intake for breeding excellent gilts during lactation is greater than for gilts that are poorly cultured (Lewis and Bunter, 2011).
It seems that the weight of gilts for the first time is about 140kg, and it is the second time after estrus. As for the age at which this weight is reached, there are slight differences between the various feeding and management systems, which generally range from 210 days to 240 days.
Increased litter size and number of weaned piglets will increase metabolic energy use in nursing sows, which will increase the loss of weight in lactating sows. Loss of more than 11% of sow weight loss should be prevented as it will have a negative effect on embryo survival, litter size and birth rate.
Cultivating excellent gilts will increase the number of litters, and at the same time the rate of sows in the second sow will also improve.
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