First, timely breeding. Breeding cattle to 15-18 months of age or weighing 350 kg and producing 2-3 months post-producing cattle for timely breeding can increase the reproductive rate and obtain greater economic benefits. First of all, observe the estrus of the cow, when the estrus looks excited, the behavior is disturbed, often climbs across other cattle, also accepts the other cattle to climb, the vulva has the transparent mucus to flow. Second, inform the cultivator of the correct estrus time (10-12 hours after the end of estrus ovulation, sperm survival 24 hours in the reproductive tract, eggs survive 6-12 hours), can effectively improve the conception rate of artificial insemination. About 24 hours from the beginning of estrus, artificial insemination is performed using the method of holding the cervix. Second, nutritional balance. Nutritional balance is the material basis for dairy cows to maintain their health and prolong their useful life. They can maintain normal appetite, achieve good public opinion, and increase their comprehensive milk production potential. Not due to lack of some nutrients, resulting in poor overall nutrient absorption, resulting in wastage of forage, impeded growth and development, disease, affecting normal production. Grass feeding follows the principle of less feeding, and hay is fed with silage. The amount of concentrate feed is determined by the amount of milk produced and the quality of roughage. Third, massage the breasts. Breast massage is one of the effective measures to improve the milk production performance of dairy cows. It can cultivate the docile habits of cattle and promote the growth and development of breasts. Under the joint action of the nervous system and the endocrine system, milking can be smoothly accepted and the breasts can be drained as much as possible. The milk inside prevents the residual milk in the breast from causing mastitis and increases the total milk production during the lactation period. Fourth, summer water. Milk accounts for 86% to 89% of moisture, protein, fat, lactose, minerals and vitamins account for 11% to 14%. During the hot summer season, cows need to drink more water than spring and autumn and winter. Adult cows need 1.5 kg of water per 0.5 kg of dry matter, and 1.5 kg of water per 0.5 kg of milk. Adequate free drinking water helps the normal synthesis of milk, which helps reduce body temperature and reduce the diseases caused by hot summer weather. Therefore, in order to meet the drinking water demand of dairy cows, cattle farms must set up automatic drinkers in the cowhouse or sports grounds. Fifth, winter warm water. Studies have shown that the amount of water consumed by cattle is affected by dry matter intake, climatic conditions, diet composition, and physiological conditions of cattle. Dairy cows need to drink 35 kilograms a day. Dairy cows with a daily output of 15 kilograms need 50 kilograms of water per day. Daily dairy cows with 40 kilograms of milk need 100 kilograms a day. The normal body temperature of dairy cows is 38.5°C～39°C, and the temperature of drinking water in winter and spring season is 10°C～19°C, which can meet the maximum drinking water needed by dairy cows, reduce the stress response of cattle body, reduce feed consumption, and increase milk production performance. Sixth, summer shade. Although forage materials are in good condition in the summer, due to high temperatures and sultry air, the cows have poor appetite and increased respiratory rate, affecting lactation. By taking a shelter or shading on the roof of a cowshed or in a sports field, the body temperature can be lowered to prevent heat stroke. If necessary, the body temperature of the cow can be reduced by rinsing cold water and spraying water. Seven, sun yang in winter. The lack of calcium in the body and the imbalance of calcium and phosphorus in winter cows will directly or indirectly affect reproduction. Solar drying promotes the synthesis of organic calcium, increases the absorption of feed phosphorus, increases the conception rate, prevents osteoporosis in adult cattle, and reduces the occurrence of diseases such as postpartum warts and retention of placenta. Eight, brush cattle body. Enhance the affinity of dairy cows and humans, cultivate the docile habits of cows, and facilitate breeding. Promotes skin metabolism, promotes blood circulation, prevents diseases from transmitting to each other, and is beneficial to the health of cattle. Nine, clever movement. Each cow should have a 20 to 30 square meters playground for the cows to exercise freely. Not only can they exercise, increase metabolism, increase health, but also increase appetite, promote feed intake, increase milk production and milk fat percentage, and prevent dystocia and dairy cows. Physical deformation. Good cow health care can extend the breeding period of high-yielding dairy cows and increase the number of births. If the conditions limit the absence of a sports field, driving the exercise for 2-3 hours can also achieve the purpose of exercise. Ten, emphasis on science. The factors affecting dairy cows' production capacity are genetic, physiological and environmental factors, among which environmental factors have a greater impact. In the external environmental factors, feeding and management is an important factor affecting the production capacity of dairy cows. Scientific feeding and management is the key to the production capacity of dairy cows. Different feeding and management methods for the same cows have a difference of 30% to 60% in milk production. Therefore, according to the growth stage, body condition, body weight, milk yield, milk fat composition, etc., reasonable supply of full-value fodder for breeding, scientific management, and create a comfortable environment, with the lowest capital investment, can obtain the largest Economic benefits. Medical protective masks refer to self-priming filter dustproof medical protective equipment that can filter particles in the air, prevent the spread of certain infectious microorganisms in the respiratory tract, and block droplets, blood, body fluids, secretions, etc. Surgical Face Mask,Disposable Surgical Mask,Disposable Protective Mask,Surgical Face Mask Disposable Guangzhou Aikangli Medical Technology Co., Ltd. , https://www.aikanli.com
Medical protective masks are masks made of one or more fabrics that have isolation effects on viral aerosols, virus-containing liquids, and so on. Under the respiratory airflow, it still has a barrier effect on viral aerosols, virus-containing liquids, etc., and when removed, the outer surface of the mask does not contact the human body, can filter particulates in the air, and block droplets, blood, body fluids, secretions, etc. . The use of medical masks includes adhesion testing, training, model selection, medical treatment and maintenance.
Composition and function: The Medical Protective Mask consists of a mask face and a tightening belt. The mask face is divided into three layers: inner, middle and outer. The inner layer is ordinary sanitary gauze or non-woven fabric. Propylene fiber melt-blown material layer, the outer layer is non-woven fabric or ultra-thin polypropylene melt-blown material layer. This high-efficiency medical protective mask is highly hydrophobic and breathable, and has a significant filtering effect on tiny virus-carrying aerosols or harmful fine dust, and the overall filtering effect is good.
The medical protective mask has a good fit with the wearer's face, can filter particles in the air, block pollutants such as droplets, blood, body fluids, secretions, etc., and can filter non-oily particles by more than 95% Personal protective equipment commonly used to deal with airborne diseases.
Product specifications: According to the national standard GB 19083-2003 "Technical Requirements for Medical Protective Masks", important performances of medical protective masks include filtration efficiency, adhesion, liquid barrier performance, comfort, hygiene, and biological safety tests.
Scope of application: Medical protective masks are better protective products. It is recommended to wear when there is serious environmental pollution or sudden medical infectious diseases (such as respiratory tract infectious diseases), to prevent the spread of viruses from patients or the environment to users.
Important indicators: including non-oily particle filtration efficiency and airflow resistance.
(1) Filtration efficiency: Under the condition of air flow (85 ± 2) L / min, the filtration efficiency of aerodynamic median diameter (0.24 ± 0.06) μm sodium chloride aerosol is not less than 95%.
(2) Tightness: The overall fit factor of the mask should not be less than 100.
How to use: How to wear a head mask
(1) Gently pinch the nose clip and place the mask on the face to ensure that it can cover the nose and mouth.
(2) The upper elastic band is fastened on the head to prevent air from entering.
(3) Tighten the lower elastic band around the neck.
(4) Be sure to fully open the mask to minimize the number of layers used during breathing.
How to wear earhook masks
(1) Pass the ear straps with both hands, place the nose clip on the upper part, and wear the mask on the nose and mouth
(2) The ear strap should be placed at the base of the ear and spread from head to toe, so that the folds of the mask are fully unfolded, which helps to cover the face to the greatest extent and minimize the number of layers required for breathing.
(3) Gently pinch the nose clip to prevent air from entering.