The factors that need to be considered in precision nutrition of chicks include physiological development characteristics at different stages, age, weight, breed, season, and quality of chicks themselves.
1. Feed stage selection
The first stage usually refers to 0 to 21 days. There are three types of special products on the market, and the applicable ages are respectively located in 0 to 14 days, 0 to 18 days, and 0 to 21 days. At this stage, the development of chicks is focused on the gastrointestinal tract. The healthy development of the gastrointestinal tract includes the two parts of the stomach, stomach, and intestine. Many feed manufacturers only pay attention to the physiological characteristics of “the digestive and absorptive functions of the chicks in this stage have not been established yetâ€, overemphasizing the ultra-fine crushing and bulking of all raw materials, neglecting the development of the muscles and stomachs, leading to nutritional muscle gastritis. High hair. Muscle and stomach is a unique digestive organ of chicken different from pigs. It needs a little bit of raw material for grinding exercise, and this exercise must be picked up from scratch. Therefore, the scientific production process is now half of the corn coarsely crushed, half of the corn, pods finely crushed And partially expanded. Must not refine all the ratios of all raw materials like piglets. In addition to the importance of smashing the raw material preparation process at this stage, another feature is the addition of a combination of probiotics and acidifying agents to promote the healthy development of intestinal flora. The third feature is the addition of a complex enzyme preparation to facilitate digestion and absorption of raw materials. The fourth feature is the high level of nutrition. The energy must reach 3 kcal/kg, the protein level reaches 21%, and the methionine content is 0.5%.
The second stage usually refers to 22 to 42 days. There are three types of products on the market, and the applicable ages are respectively located at 15 to 42 days, 19 to 42 days, and 22 to 42 days. At this stage, the nutritional level of the product diet can be lowered according to the results of the recent nutrition study: energy of 2.9 kcal/kg or more, crude protein level of 19%, and methionine content of 0.42% or more. At the same time, really good products need to be selected by those who carefully add immunostimulants and immune stress. 15 to 42 days are the key stages in the development of the immune system. In actual production, there are many times of immunization and stress. At the same time, it is hoped that the chicks will have good immune feedback. Therefore, high-end products at this stage are generally supplemented with feed additives containing anti-immune stress such as vine tea flavonoids and astragalus polysaccharides to enhance immunity.
The third stage usually refers to 43 to 84 days. At this stage, the nutritional level of the product feed products is generally: 17% to 18% of crude protein, energy 2.8 to 2.9 kcal/kg, and methionine 0.4%. The focus of this stage is the development of bones, so the high-grade products must be suitable for calcium and phosphorus, and the amount of calcium hydrogen phosphate added is sufficient.
2. Stage division based on weight rather than age
The choice of feed products can not be based on the age of the whole, but based on the standard body weight of the corresponding feeding management manual of the age of the day to replace the product. If you have a low body weight, you have to postpone the reloading process; if you are overweight, you can reload it in advance.
3. Variety
At present, the main domestic breeds are heavy brown shells, medium-sized powder shells, and light white shells. Different breeds have different nutritional requirements. The white shell is light and it is generally recommended that the material in the first stage should be used for about 35 days. Medium-sized powder shell, the first phase of the material is recommended to use about 30 days.
4. Season
Different feeding conditions in different seasons Although there are many modern closed chicken houses in the country, most of them cannot be fully controlled. In hot and humid seasons, chickens in more than 30 days of chicken houses will experience high-temperature stress such as “puffingâ€. At this time, the feed intake of chickens is low, so the feeding time for the second phase of the first phase will be extended accordingly. Ensure the normal growth and development of chicks.
5. Quality of chicken itself
Even if the same species of chickens on the same farm, their quality is also different. For the example of Hyland Brown, the average weight per unit of weight reached 36 grams per bird (after about 12 hours of transport time), and only 33 grams of chicks were hatched from the first hen hatching, and the first stage feed was used. It is recommended to feed 2 to 3 more days to ensure adequate nutrition. At the same time, it is more cautious for the first three days of heat preservation for such chickens, and the temperature is also increased by 0.5°C to 1°C based on the body temperature standard. The initial weight of chicks hatched by hens at the end of the peak of egg production is relatively large, generally above 37 g/m. Such chicks have low maternal immunity. Therefore, the first and second stages that contribute to immunity improvement should be separately Feed 2 to 4 more days.
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
The fundamental difference from traditional electric scooters, battery scooters, bicycles and other transportation tools is that electric wheelchairs have intelligent operating controllers. According to the different operation methods, there are rocker-type controllers, and controllers controlled by various switches such as the head or blowing system. The latter is mainly suitable for severely disabled people with upper and lower limbs. Nowadays, electric wheelchairs have become an indispensable means of transportation for the elderly and the disabled. It is suitable for a wide range of objects. As long as the user has a clear consciousness and normal cognitive abilities, the use of electric wheelchairs is a good choice, but it requires a certain amount of space for activities.
power wheelchair,hospital use,homecare product,surgucal equipment
Shanghai Rocatti Biotechnology Co.,Ltd , https://www.shljdmedical.com