The formula for measuring the weight of live pigs is: weight (kg) = chest circumference (cm) × body length (cm)/coefficient. If the nutritional status of pigs is good, the coefficient is 142, if the nutritional status is moderate, it is 156, and if the nutritional status is poor, it is 162. When measuring the pig's chest circumference, measure the vertical circumference of the chest with a tape measure at the back edge of the pig's scapula.

First, the accurate calculation method of pig weight

1. Formula for calculating the weight of live pigs: weight (kg) = chest circumference (cm)? Body length (cm)/coefficient. It should be noted that if the nutritional status of pigs is good, then the coefficient is142; If the nutritional status is moderate, the coefficient is156; If the nutritional status is poor, the coefficient is 162.

2. Method of measuring pig's chest circumference: Measure the vertical circumference of the chest with a tape measure at the back edge of the pig's scapula, and the tightness should be naturally close to the fur.

3. Method of measuring the pig's body length: When the pig is in a normal standing posture (the limbs are upright and the collar line is flush with the chest line), fix one end of the tape measure on the occipital-atlas joint of the pig with the left hand, then pull the tape measure with the right hand to fix it at any point on the back midline of the pig, replace the position set by the right hand with the left hand, and then tighten the tape measure with the right hand until the root of the pig's tail, so that the pig's body length can be measured.

4. Pay attention to the accurate value, estimated value and unit when recording the measurement results. It is also necessary to choose suitable measuring instruments according to the size of pigs. When reading, in addition to reading the exact value above the scale value, it is also necessary to estimate the next value of the scale value, that is, the estimated value.

Second, the multiple of pigs can reach the standard of slaughter.

1, pigs generally reach the slaughter standard at around 200 kg. The time for pigs to be slaughtered is generally about half a year, and the time is relatively long, about 220 days. The specific slaughter time is related to factors such as feeding methods and pig breeds.

2. If it is a large-scale farm, in order to pursue breeding benefits, you can choose excellent foreign varieties for breeding. If we develop characteristic economy and choose stocking mode, we can choose local varieties for breeding. Moreover, fattening pig breeds should be selected with good breeding, fast growth, strong disease resistance and short fattening cycle.

It is best to feed pigs with complete feed. If the raw materials are sufficient, the quality is good and there is no mildew, you can also choose premix or concentrated feed, but you must ensure that the feed is mixed evenly and the quality of raw materials is guaranteed. It is also necessary to choose feed according to the variety and growth demand of pigs, and scientifically match the formula of feed according to the variety and growth stage of pigs.

4. Keeping good water supply in pigsty can promote the healthy growth of pigs. When selecting water sources for pig farms, it is necessary to ensure that the water sources are clean and have few impurities, and at the same time, it is necessary to avoid the blockage of water pipes of drinking fountains. At ordinary times, we should also check the use of the water dispenser, and repair it in time when it is found to be damaged, so as to avoid affecting the normal drinking of pigs.