Combine with group selection: 鹧鸪 After 6 weeks of age, artificial selection should be made and the proportion of 2 males and 2 females should be used to keep good seedlings for seeding. Bad or excess males and females.鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪 鸪. Fertility requirements are to meet the following criteria: Attitude is normal: When standing, the body is required to balance, and the shoulder is naturally inclined to the tail with a slope of 64 degrees. Anybody with low shoulder, back arch and low tail should be eliminated. Moderate posture: free pace, flexible action, proper weight. Such as the pace of swing, there are limp, underweight, should be eliminated. Body Standard: Eyes are big and round, short and wide, and slightly curved, moderate in length, well-proportioned in neck and head, flat in back, wide in chest, parallel in back and chest. The narrow and long is a oligo-product, and it is not appropriate to keep the seed. Strong feet: The ankles are hard and straight, moderate in length, and generally have a length of 1 cm. Toe is complete and normal. The toes were bent, without toes or multiple toes (normally 2 toes, more than 2 or less than 2 abnormalities) and no species were left. Feeding: Glass windows and portals in breeding houses must be provided with barbed wire and a playground surrounded by fences and fences so that crickets can eat and sleep quietly in their homes, and they can fly to live animals to receive natural light. Suitable exposure to sunlight, absorption of fresh air, and increased physical activity are important measures for the development of high-yield expectorants. In the breeding period, crickets have not yet reached sexual maturity and can be mixed with males and females. They can be raised in the ground and can also be raised off the ground. Flatland raises the cost and is cheaper than online, but it is not as good as online to prevent diseases. The best way to raise the grass is to keep the grass in the best place on the floor. The grass should be clean and fresh, and the hygiene work should be the same as the brooding period. Strong and weak grouping: The breeding density depends on the age of the pupa, and at 15 weeks of age, 35 bred per square metre; after 65 weeks of age, the average is 61 broilers per square metre. Strong and weakly reared in groups, otherwise it will cause inconsistent development and individual differences. China Agricultural Network Editor
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