How much is the density of the pigs in the fermentation bed suitable?
About 300 pigs are kept on a small pig farm in Quzhou, Henan Province, and the pig farm is located in a highland. At the end of 2008, the company started using the technology of the Grimaud Fermentation Bed, with a large pigsty of 32 square meters and feeding 29 pigs to the slaughterhouse. The average area of ​​each pig was 1.1 square meters, but the litter was still dry. There was no significant accumulation of manure, indicating that the fermentation bed had normal fermentation function. This is currently the largest density pig bed in a pig farm. After careful inspection, the reason why the pig farm can be kept at a high density is mainly because of the high dryness and good ventilation of the pig farm. However, this density index can only be used under certain conditions and should not be universally promoted.
The application of this fermentation bed can have at least three implications: Firstly, the tycoon dry-type fermentation bed housing can completely ensure that the stocking density is not less than or even greater than the current cement housing, which breaks through the currently widely considered fermentation bed breeding. The density is significantly lower than that of the cement housing. Second, the feeding density of the dry-sparing fermentation bed can be significantly higher than that of a wet-type fermentation bed that needs to be fermented in advance. This proves the advantages of the dry-type fermentation bed; In a dry and ventilated environment, the efficiency of the fermentation bed is much higher, indicating that the environment and the drying of the litter are very beneficial to the fermentation function of the fermentation bed.
From the perspective of the use of most dry spreader beds, in order to make full use of the space in the pig house, the piglet stage adopts a high-density rearing system, feeding 1.5 to 2.0 heads per square meter. Later, as the weight of pigs increases, some pigs are driven out, gradually reducing the number of breeding heads in a single lap, and reaching about 0.7 heads per square meter before slaughter. The gilts and pregnant sows each account for 3-4 square feet (multiple sows are feeding in a circle) and the nursing sows cannot be less than 6 square meters per head.
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