(1) Appropriate age of ducks The adapting age of male ducks varies from species to species, and is generally 5-8 months. During this period, the drake is energetic, and the female ducks are also fertile. (2) The ratio of male and female ducks adopts the group matching method if this method is adopted. However, the proportion of males and females must be appropriate, and too many or too few male ducks will affect the fertility rate. The ratio of males and females is roughly as follows: Meat ducks 1:4-8; dual-use ducks 1:8-12; egg ducks 1:20-25. (3) The useful life of breeding ducks The breeding ducks are generally changed once every two to three years, because the highest egg production in the first year is 10-15% in the following year, and the decline is 15-25% in the third year. The eggs produced by the above ducks have significantly reduced the fertilization rate and hatching rate. The ducklings have not developed well and the mortality rate is high. Therefore, the female ducks should be eliminated by the fourth year. The useful life of meat female ducks should be shorter than that of egg ducks, and it is generally eliminated until three years. The breeding age of egg-duck is generally 2-3 years. Meat ducks are generally 1-2 years old.
Drying Machine
This hot air circulating drying oven is tray mode intermittent universal drying equipment which is high in utility, widely used in medicine, chemical industry, food industry, light industry, electronics and other fields.
1.This drying machine uses electric heating elements as the heat sour
2. The material is stainless steel,keep the machine durable using.
3.After switching on the electric power, switch on the fan. The rotational direction of fan shall consist with the mark.
Fruit Drying Machine,Vegetable Drying Machine,Food Drying Machine,Drying Machine
Zhucheng Tongxi Commercial And Trade Co.,Ltd. , https://www.blackgarlicgroup.com