5results about How to "Improve lactation performance" patented technology

The invention relates to the technical field of feed additives, in particular to application of 3-indolepropionic acid to improvement of reproductive performance of sows. The 3-indolepropionic acid is added into the feed for the sows in the middle and later periods of pregnancy, is used for improving the reproductive performance of the sows, and has a remarkable effect, so that the use amount of antibiotics for health care can be reduced in the breeding process of the sows. The feed additive prepared from the 3-indolepropionic acid can improve the average litter live piglet weight and average litter healthy piglet number of the sows, improve the lactation ability of the sows and relieve the postpartum lochia condition of the sows.

The present invention provides SNP markers related to the milk production trait of Holstein dairy cows in southern China and applications thereof, wherein the first SNP marker is located at 39037752bp on the reverse strand of chromosome 18 of the genome of Holstein dairy cows in southern China, the base is C or T, the 305d milk yield of CC genotype individuals of the first SNP marker is extremely significantly higher than that of CT genotype individuals and TT genotype individuals, and the total milk yield and peak milk yield are significantly higher than those of CT genotype individuals and TT genotype individuals; the second SNP marker is located at 39037665bp on the reverse strand of chromosome 18 of the genome of Holstein dairy cows in southern China, the base is G or A, and the total milk yield and peak milk yield of GG genotype individuals of the second SNP marker are significantly higher than those of GA genotype individuals. The two SNP sites provided by the present invention enrich the molecular marker genetic resource library for dairy cow breeding, and using the same for molecular marker-assisted selection is conducive to improving the milk yield of Holstein dairy cows in southern China, and will not affect the reproductive traits of Holstein dairy cows in southern China.

This invention discloses an organic trace element complex for lactating dairy cows, comprising the following components in parts by weight: 40-70 parts of hydroxymethionine complex, 0.1-0.2 parts of sodium iodide, 30-45 parts of yeast selenium, 0.1-0.2 parts of cobalt sulfate, 10-25 parts of synergist, and 5-10 parts of carrier. This invention also discloses the preparation method and application of the above-mentioned organic trace element complex. When used in lactating dairy cows, the various hydroxymethionine complexes can effectively pass through the rumen to the small intestine and be absorbed through amino acid channels, meeting the needs of dairy cows for various trace elements during lactation. The synergistic effect of the various hydroxymethionine complexes and the synergist can improve the lactation performance of dairy cows, increase milk production, enhance the body's resistance, significantly reduce the incidence of mastitis and hoof diseases, and alleviate ketosis.

The invention discloses a compound pig feed additive and a preparation method thereof. The preparation method comprises the following steps: determining the types of additives and preparing raw materials according to different types: a Chinese herbal medicine additive, a plant additive, a medicinal additive and other additives; mixing and stirring: uniformly mixing the raw materials according to the required proportion; and storing and using: storing the mixed feed in a dry, shady, cool and dark environment so as to keep the activity of the feed. In conclusion, by adding different additives into the pig feed, the device has the advantages that growth is promoted, meat quality is improved, the Chinese herbal medicine additive can promote growth of pigs, and the digestion and absorption rate of the feed is increased. For example, the apparent digestibility of crude proteins and acid detergent fibers in the feed can be improved by adding the compound additive containing the Chinese herbal medicines such as the pericarpium citri reticulatae, the hawthorn and the medicated leaven, and the Chinese herbal medicine additive can enhance the immune function of the pigs and increase the content of immune factors such as albumin and globulin in serum, so that the disease resistance of the pigs is improved.

The invention belongs to the technical field of molecular biology, and relates to a large white pig nipple number character related FRMD4A gene SNP (Single Nucleotide Polymorphism) marker as well as a detection method and application thereof. The SNP marker is located on a nucleotide sequence of an FRMD4A gene on a pig chromosome 10, a site of the SNP marker is a g.48019215 nucleotide site on the pig chromosome 10 of a reference sequence of an international pig genome version 11.1, the SNP marker has C / T polymorphism, and the SNP marker is remarkably related to the nipple number character. The SNP marker provided by the invention is related to pig nipple number characters, pig strains with multiple nipples can be screened by identifying the SNP marker, and the obtained strains with multiple nipples and high reproductive capacity have important economic benefits and social values.