Variety selection: At present, more than two foreign sow sow, that is, two foreign hybrid sows introduced.
Specific requirements: First, normal growth and development, lively, healthy and disease-free. Second, the appearance of the body conforms to the characteristics of this breed. Such as hair color, ear type, head type, body type, etc. must meet the requirements of the species. Third, high production performance, normal heat. Also pay attention to the selection of nipples in more than 7 pairs, neatly arranged, the purulent development and sagging individuals. The gilt growth and development traits or their siblings fattening traits is also an important basis for selection, mainly including two aspects of growth rate and feed utilization, that is, gilts should choose those who own and fellow pigs grow fast, high feed utilization rate Individual. In addition, the gilts used instruments to measure backfat thickness and eye muscle area at 6 months of age to understand fat and lean growth.
Selection period: The gilts are divided into the following four periods: First, 2 months of age selection. The 2-month old selection is a good choice and it is a good individual who chooses to stay in Dawo. The nesting is based on the condition that the parents are all good individuals, and mothers and pigs that are well-developed are selected from a large number of births, a high nurturing rate, and a large litter nest. Second, 4 months of age choice. It is mainly to eliminate those individuals with poor growth or development and outstanding defects. Third, 6 months of age choice. When a gilt reaches 6 months of age, it can be carefully selected according to its various properties to eliminate adverse individuals. Fourth, choose before planting. The last selection of gilts before the initial allocation eliminated individuals with unsatisfactory development of sexual organs, irregular estrus cycles, and indistinct estrus.
Forage Grass
Forage Grass,Medicago Sativa,White Clover,Perennial Ryegrass
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