When is the best time for dog breeding?
When puppies reach a certain age after birth, male dogs can produce sperm with the ability to fertilize, which is called sexual maturity. Maturity does not mean that it is possible to reproduce, because the dog is not yet fully mature. About 12 months of age is the appropriate time to start breeding.
In general, the sexual maturity of small dogs is earlier, while that of large dogs is later.
It is generally believed that sexual maturity is 8-12 months old after birth, and there are 6 months earlier. It's different all over the country. Small and medium-sized dogs are 1.5 years old, and the survival rate of reproduction is high, and it is most suitable for large dogs to start breeding at the age of 2.
Dogs are single estrus animals and do not repeat oestrus. Normal estrus occurs twice a year, and most dogs have estrus once in March, April and September and October in Autumn.
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Cocoon collection and sale of silkworm
1. The suitable time for cocoon collection: after the cocooning of mature silkworm, molting and pupation, with the development of pupa, the skin becomes hard and the skin color becomes darker, when the skin color changes to yellow, it is the suitable time for cocoon collection. The spring silkworm period is 6-7 days after the upper cluster. The summer and autumn silkworm period is 5-6 days after the upper cluster, and the late autumn silkworm period is 7-8 days after the upper cluster. The cocoon is picked too early, the silkworm has not yet pupated, the hairy foot cocoon is not easy to be evenly baked during cocoon drying, the cocoon quality is reduced, and the hairy foot cocoon is easy to seep the dirt out of the cocoon layer during cocoon cooking, which makes the color of raw silk worse.
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Key points for attention in practical application reasonable collocation between different protein feeds due to different qualities of different protein feeds, mainly due to different contents of essential amino acids, the reasonable collocation of protein feed must be considered when compounding dairy cow feed. in order to ensure the intake of reasonable protein nutrients for dairy cows. In the actual production, when we use corn meal, silage corn and DDGS, because of the high methionine content and the relative lack of lysine, lysine becomes
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