Feeding method of high-quality pork of Laiwu black pigs

Abstract

The invention discloses a feeding method of high-quality pork of Laiwu black pigs. The feeding method comprises the following steps: firstly dividing the growth and development period of the Laiwu black pigs into a nursing period, a growing period and a fattening period, wherein the weight in the nursing period is 15 to 30 kg, the weight in the growing period is 30 to 60 kg, and the weight in the fattening period is 60 to 90 kg; setting amino acid models according to different periods, wherein in the nursing period, an energy-protein ratio is 19.98 to 21.54, DE (Digestible Energy)/lysine is 296 to 409, DE/methionine is 900 to 1701, DE/methionine + cystine is 450 to 850, DE/threonine is 415 to 785, and DE/tryptophan is 1500 to 2835; in the growing period, the energy-protein ratio is 21.11 to 22.79, DE/lysine is 326 to 464, DE/methionine is 1004 to 1378, DE/methionine + cystine is 525 to 624, DE/threonine is 488 to 581, and DE/tryptophan is 1693 to 2268; in the fattening period, the energy-protein ratio is 22.40 to 24.25, DE/lysine is 362 to 534, DE/methionine is 1116 to 1456, DE/methionine + cystine is 563 to 651, DE/threonine is 518 to 624, and DE/tryptophan is 1915 to 2485; designing a formula according to the ratio between the amino acids in the models, preparing daily ration, and feeding in stages. According to the feeding method disclosed by the invention, the lean meat percentage of the black pigs is increased, the content of intermuscular fat of the pigs is improved, and the pork yield and the evaluation score of the pork are increased.

Description

technical field [0001] The invention relates to a method for feeding high-quality pork from Laiwu black pigs. Background technique [0002] The historical breeding of Laiwu black pigs can be traced back at least to the primitive society in the new era. As one of the characteristic local breeds in Shandong Province, "Laiwu black" has high fecundity, strong nurturing ability, rich and fresh meat flavor, and stress resistance. It is listed as a key protected animal breed resource by the Food and Agriculture Organization of the United Nations, and listed as a national animal genetic resource protection breed by the Ministry of Agriculture. It is a characteristic breed in the current pork market. From the end of the 1950s to the mid-1970s, there was an unplanned introduction of new breeds of pigs and Laiwu black pigs for hybrid improvement, and purebred Laiwu pigs were constantly eliminated. By the end of the 1970s, purebred Laiwu black pigs were on the verge of extinction. The...

AI Technical Summary

Problems solved by technology

The disadvantages of Laiwu pigs are poor fattening ability and carcass performance, slow weight gain, late body maturity, low feed remuneration, thick skin, thick fat, small eye muscle area and hind leg ratio, and low lean mea

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