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Second, poor body size Any small size, deformity, limb deformity or suffering from self-bite and chronic diseases can not stay.
Second, the low fertility General maternal puerpera at least not less than 4 births, 4 years old and older than 5 years old female puerperal birth no less than 6 are high yield female quail, otherwise they should be eliminated. Each year, breeding stocks should be bred with more than 4 females and the number of servings should be more than 10 times. Otherwise, they should be adjusted.
Fourth, plush discoloration to coat color, luster, density, hair length and distribution of the degree of uniformity to identify the advantages and disadvantages of species. If the dark brown species of male boar becomes brown or light brown, the density is sparse, the distribution is not uniform, the length is too long, there is a lack of uniformity, and there is more fuginess.
Four types of water can not be left
First, the use of overage seedlings for 1 to 4 years is appropriate. The female breeding rate from 1 to 5 years of age was 79.67%, 93.7%, 100%, 100%, and 70%, respectively; the fertility rates of mother-tongues from 1 to 5 years old were 78.7%, 88.7%, 96.1%, and 95%, respectively. 0. Therefore, the female parent must not exceed 4 years old.