Raise sheep scientifically
Whether the breeding of adult sheep is reasonable or not plays a decisive role in the body structure and the speed of growth and development. Improper feeding can lead to overweight, thin or hindered growth and development of sheep at a certain stage, such as long legs, short body, vertical abdomen and so on.
Formula of concentrate supplement for breeding sheep
Roughage type
Feed quality hay type corn silage type dry corn straw type
(%)
Corn 60.0058.5058.50
Wheat bran 15.5013.008.00
Soybean meal 10.0010.0014.00
Cotton meal 6.006.007.00
Rapeseed meal 5.005.005.00
Peanut meal 03.004.00
Calcium hydrogen phosphate 0.500.500.50
Stone powder 1.001.001.00
Salt 1.001.001.00
Baking soda 01.000
Additive premix 1.001.001.00
Total 100100100
1. Appropriate nutritional level
The type of feed has a great influence on the body shape, growth and development of sheep. Excellent hay and adequate exercise are the key to breeding sheep. Feeding a large amount of high-quality hay to the bred sheep is not only conducive to the full development of digestive organs, but also tall, obvious breast development and more milk production.
The quality of roughage is poor, so we should pay attention to the supplement of concentrate, about 0.4 kg of concentrate can be fed every day, and we also need to pay attention to the supply of minerals and trace elements. When feeding high-quality roughage, you can give less or no concentrate, too much concentrate and lack of exercise, which is easy to make sheep obese, precocious and senile, and shorten the useful life. Because the growth and development of bred rams is faster than that of ewes, the requirement of concentrate supplement is more than that of ewes. According to different types of roughage, concentrate supplement formula can be referred to the left table.
two。 Timely breeding
Generally, ewes are bred when they reach the age of 8-10 months and the weight reaches 40 kg or more than 65% of the adult body weight. Rams before 8 months of age are generally not allowed to collect semen or mate, but must participate in mating after 12 months of age and when their body weight reaches more than 60 kilograms.
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Chicken infectious anemia-pathological changes
The most characteristic pathological change of simple chicken infectious anemia is bone marrow atrophy. The bone marrow of thigh bone is fatty, yellowish or pink; thymus atrophy and hyperemia can lead to complete degeneration. With the increase of age of diseased chickens, thymus atrophy is easier to observe than bone marrow lesions. Fabricius bursa atrophy is not obvious and is often transient. Sometimes the weight decreases and the volume becomes smaller, while the appearance of the bursa of most diseased chickens is translucent. If the condition is serious, the liver and kidney can be enlarged and the yellow substance becomes brittle. Sometimes glandular gastric mucosal bleeding and subcutaneous and muscular bleeding can be seen.
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Prevention and treatment of polyserositis and arthritis in pigs
1. Preventive measures ⑴ should first strengthen the feeding management, strictly implement the veterinary sanitary disinfection system in pig farms, and avoid or reduce the occurrence of stress factors, such as preventing sudden changes in feeding conditions and infection of other pathogenic microorganisms. ⑵ when stress occurs, pigs can be given prophylactic doses of antibiotics (such as amoxicillin, florfenicol) or sulfonamides, which can prevent the occurrence of the disease. When new pig herds are introduced into ⑶, they should be raised in isolation and maintenance.
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