Autumn season of cow breeding in golden season
Catalyst refers to a substance which can change the reaction speed in a chemical reaction and whose composition and mass remain unchanged after the reaction. The catalysts that speed up the reaction are called Positive Cata-lyst and the slower ones are called Negative Cata LYST or moderators. Generally speaking, the catalyst is to correct the catalyst. These catalysts are widely used in industry, especially in organic chemical industry. They are of great significance, for example, catalysts are needed for the preparation of sulfuric acid by contact method, the hydrolysis of synthetic ammonia, esters and polysaccharides, and the hydrogenation of oils and fats. Commonly used catalysts are metals, metal oxides and inorganic acids. If the catalyst is a solid, the reactant is a gas, forming a heterogeneous catalytic reaction, this catalyst, sometimes called a catalyst or contact agent.
Auxiliaries refer to the industrial and agricultural production, especially chemical production, in order to improve the production process, improve product quality and output, or give the product a unique application performance, usually need to add some auxiliary chemicals. It is a kind of important auxiliary raw materials in chemical production, which can give the products special properties and improve the use of finished products, accelerate the chemical reaction speed and improve the yield of products, save raw materials and improve the processing efficiency. It is widely used in chemical industry, especially in organic synthesis, synthetic material processing and petroleum refining, pesticides, pharmaceuticals, dyes, coatings and other industrial sectors. By use, it can be divided into synthetic auxiliaries and processing auxiliaries. Auxiliaries used in the synthesis and polymerization of resins, fibers, rubber and other monomers are called synthetic auxiliaries, including catalysts, initiators, solvents, dispersants, emulsifiers, polymerization inhibitors, regulators, terminators, etc. Auxiliary chemicals used in the manufacture of rubber, plastic products and in the spinning and spinning of chemical fibers are called processing aids, including plasticizers, heat stabilizers, antioxidants, light stabilizers, flame retardants, foaming agents, lubricants, demoulding agents, vulcanizing agents, accelerators, softeners, anti-scorching agents. Agents, surfactants, oils, fillers and so on. Many of these Additives are dangerous chemicals, such as diphenyl peroxide, azodiisobutyronitrile, hydrogen peroxide-ferrous blue, alkyl aluminum, titanium chloride and other initiators, catalysts are inflammable and explosive materials, should be stored and transported in accordance with the relevant provisions of the Regulations on the Safety Management of Chemical Hazardous Goods. Management and use.
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Do not mistake
From August to October in the lunar calendar, it is the peak season for cows to fall estrus. Prior to the mating period, cows of the right age should have a moderate body condition, and neither over- or under-weighting are conducive to breeding. For lean cows, mix 40% corn, 30% barley, 20% wheat, and 10% soybeans, soak for 4 hours to 6 hours with fresh water, beaten, add 8% to 10% of the total amount of the above feed, and 5% Bran, 1% salt, 3% to 5% bone meal, supplemented with cattle twice a day in the morning and evening, with 7.5 kg to 10 kg of water each time, and extend the time of grazing, mowing the grass to feed the cows Estrogen breeding in the short term. Only the cows have a good sensation, the estrus is normal, and fertilization and pregnancy are guaranteed.
Picking a good bull
The quality of bulls has a great influence on the quality of cattle. If it is a cross (natural mating), every 20 to 30 adult cows will be selected to keep an excellent bull aged 3 years and up to 8 years old, and be kept by special personnel. Bulls should be fed with green feeds and concentrates. Feeding animal feeds, such as eggs, fish meal, etc., should also be added when the animals are busy. At the same time, it is necessary to prevent indiscriminate blending of near and inferior species.
Doing a good job
The buffalo's estrus cycle is 18 days to 25 days, lasting 2 days to 4 days; the estrus cycle of the cattle is 18 days to 21 days, lasting 1 day to 2 days. Cows have reduced appetite and excitement after estrus. They like to approach the bulls and crawl with each other. They often do urination but have less urine. The pus is flushed, congested and slightly open, often accompanied by white translucent mucus that flows out. Cows also have a small amount of blood flowing from the vagina. At this point touch the cow's buttocks, oxtail Gao Qiao, quiet, two hind legs open to do the mating action, after the gradual recovery of appetite, loss of libido, genital swelling gradually subsided, mucus is small and thick (rectal examination, estrus is in the follicular maturation Or ovulation period, at this time it is most appropriate to breed or inseminate cows. Female broiler eggs range from 10 hours to 15 hours after the end of estrus to the end of estrus. Suitable breeding time is 8 hrs to 12 hrs after the start of estrus, and buffalo is more suitable for culturing at about 20 hours after estrus.
Repeated breeding
About 70% of mothers and oxes ovulate at night. According to this special law, cows inseminated at 7 o'clock in the evening on the day when the estrous characteristics began to appear. In order to increase the conception rate, a method of repeated breeding can also be adopted, that is, repeat breeding for 8 hours to 12 hours after the first breeding. If the cow is bred at 7 pm, it can be repeated at 5 am to 8 am the next morning.
Artificial insemination
Artificial insemination is an important part of improving the conception rate of cows, especially the rectal grasp method is more effective. During the operation, insert the vas deferens flatly into the cervix 5 cm to 7 cm, then slowly inject semen. After the insemination, the vas deferens should be pulled out slowly to prevent damage to cow vagina or semen.
Aphrodisiac breeding
The opposite sex induces aphrodisiac, and the estrus bull chases non-estrus cows and heats the cows.
Hormone drug aphrodisiac
For estrus-producing cows, one of the following female hormones can be injected. The amount of ethylene female powder is 25 mg to 35 mg, diphenol ethane 40 mg to 60 mg, and triads 3 g to 5 g. After the cow can be estrus breeding.
Aphrodisiac
Motherwort 30 grams, pumpkin leaves 24 grams, 15 grams of safflower, Jianshui bovine gavage; old jujube tree split skin 0.5 kilograms, brown sugar 1 kilogram, add water 3 kilograms, Jianshui to cattle sooner or later gush, even After serving for 2 days to 3 days, the cow can be estrus.
Strengthen post-breeding management
Don't let the cows exercise vigorously within 1 hour to 2 hours after the cows are mated. Try to avoid cows drinking or eating too much. Within 15 days after breeding, feed should be added at night, plus 1 kg to 1.5 kg of wheat bran or distiller's grains, and clean drinking water with a small amount of salt should be given to facilitate implantation of fertilized eggs. The daily amount of salt is 25 grams to 28 grams. During pregnancy, the growth of the cow and the growth of the fetus, placenta, and uterus will require a large amount of nutrients, so pregnant cows should be supplied with protein, vitamins, and mineral-rich feed. If feed alone or feed supply is insufficient, cows and fetuses will suffer malnutrition, affect the normal growth and development of the mother and child, and even cause fetal death in severe cases. Special care should be taken to prevent miscarriage, not to feed molds, spoilage, poisonous, and excessively acidic feeds; to feed frozen, intensely irritating feeds to prevent enteritis, miscarriage, or production of weak and stillbirths; Frightened, to avoid nervous tension caused by uterine contraction abortion, frightened cows will also appear to increase adrenaline secretion, so that the blood vessels to contract, resulting in decreased blood flow to the placenta, easy to cause miscarriage; prevent cows from colliding, sliding Mechanical abortions that occur when whipped or topped off.
Drugs for fetal care
When vaccination with lyophilized Brucella genus No. 5 attenuated bacterin vaccine was performed, progesterone 0.5 g to 1 g could be given intramuscularly to pregnant cows once a day for 1 week. Remember: Use dexamethasone with caution.