The appropriate temperature for laying hens to lay eggs, and the best temperature for incubating egg

Generally, the temperature of the 1-2-day-old brood room is 34-35, and the temperature in the house is 27-29. After every 7 days to reduce the temperature to about 21 on the 28th day, it can be maintained, and the most suitable temperature for laying hens is 18-23. In the process of cooling, we must maintain a balanced cooling, but also consider the weather conditions, the cooling rate is too slow is not conducive to the growth of feathers, and the cooling speed is too fast The chicks are not adapted, resulting in a decrease in growth rate and an increase in death.

Netizens asked: Hello, I have 10,000 local chickens at home, and there has always been a situation of chicks losing their feathers recently, what should I do?

Xiaolongnu replied: Hello, this kind of flock hair loss situation first consider ectoparasites, carefully observe, if it is determined that there are ectoparasites, it is recommended to precursor worms, and then use some good multi-vitamin nutrition, such as amino vitamins, to promote feather abundance and brightness.

Netizens asked: Hello, help me see what happened to the four-day-old chick paste anus, and I used some glucose.

Xiaolongnu replied: Hello, chick paste anus is chicken dysentery, it may be that the use of excess glucose causes the chick paste anus, or it may be that the choice of opening medicine is incorrect, it is recommended to stop using glucose, choose cephalosporin opening medicine, do not hurt the liver and kidney, you can use our company's phosphorus rod to clear the fourth or sixth generation, for chicks to purify E. coli and Salmonella effect is very good.

Netizens asked: Hello, when is the appropriate time to get the Newcastle disease vaccine for the local chickens I raise?

Xiaolongnu replied: Newcastle disease is one of the main viral diseases that need to be prevented in native chickens, chicks 7 10 days old with Newcastle disease IV vaccine drinking water or nasal drip for the first immunization, chickens 18 days old for the second immunization, chickens 60 days old after the use of Newcastle disease I vaccine intramuscular injection.

Netizens asked: Hello, my broiler chickens, may I ask how many times the amount of bursal vaccine is good at 14 days?

Xiaolongnu replied: If you use imported vaccines, you can double the dose, and domestic vaccines are recommended to be doubled, and when you use it, you can cooperate with multi-dimensional to prevent stress.

Netizens asked: Hello, what is the temperature that the laying hens adapt to during the peak period?

Xiaolongnu answers: adult chickens generally adapt to the temperature range of 5 28 degrees, the temperature of laying hens is 18 23 degrees, below 13 degrees or higher than 28 degrees will obviously affect the egg production performance, the humidity of the matter is 60% 70%.

The suitable temperature for laying hens is 15 22, and if it exceeds 27 or is below 13, the egg production will be affected. If the layer is at a temperature of more than 22 for a long time, it will cause the egg weight to be reduced and the eggshell to become thinner; When the temperature is higher than 29 and lower than 5, the laying rate will be significantly affected; When the house temperature is below 2, it is difficult for the birds to maintain a normal body temperature and a high peak of egg production, which increases the nutrients required to maintain the need for production and decreases the nutrients required for production, resulting in a decrease in egg production and feed utilization.

The model relationship between layer production and temperature was as follows: egg laying rate 65 893 maximum temperature 574 87 minimum temperature; The average egg weight is 4 046 and the highest temperature is 483 the lowest temperature.

2. Humidity. The relative humidity is suitable for 55% to 60%. High humidity has the greatest impact on laying hens. The chicken coop should be built in a dry and sunny place, using thermal insulation and moisture-proof materials, strengthening ventilation and cleaning manure in time.

3. Illumination. 17 18-week-old young hens should be transferred to the laying house, artificial light should be gradually increased under natural light, reaching 16 17 hours at the peak of laying at 26 to 28 weeks, and this light should be maintained until the end of laying at 72 weeks of age. The appropriate light intensity is 6 10 lux.

Fourth, the air harmful gases in the chicken house mainly include ammonia, hydrogen sulfide, methane, carbon dioxide, etc. Carbon dioxide concentrations in the milligram kg range had no significant effect on egg laying rate and egg weight. The way to prevent the concentration of harmful gases from being too high is to strengthen ventilation and clean chicken manure in time.

At the same time, there are also a large number of bacteria in the air, such as staphylococcus, E. coli, micrococcus, etc. The results showed that the concentration of particulate matter and ammonia in the cage chicken house were relatively low, the concentration of particulate matter near the window in the chicken house was higher, the intermediate concentration was lower, and the concentration at the air inlet and outlet was higher than that in the middle of the chicken house. Ammonia concentrations tend to accumulate in the middle of the house.

1. The temperature of the eggs used for hatching should be kept at about 25 in the operation room;

2. During the incubation process, the temperature should be appropriately lowered, and the temperature should be controlled at;

3. After the chicks are hatched, the temperature of the hatcher is raised, and the chickens are treated as weak chicks after the day is reached.

The incubation period of chickens is about 21 days, 18 days of putting on the plate, 7 days of eggs, generally to room temperature, there may be early or delayed hatching. During the incubation process, the humidity should also be appropriately increased, and the humidity should be controlled at 70 to 80%.

1 6 days for; 7 for 14 days for 38 ; 15 days for; 16 to 21 days.

A certain temperature is required for eggs to hatch. It is generally believed that chickens have a physiological zero temperature of about 35 degrees Celsius, and chicks will hatch at temperatures between 35 and 2 degrees Celsius.

At the beginning of incubation, the relative humidity should be maintained at 60 70; In the middle and late stages, the relative humidity is required to be maintained at 50 55; The shelling period requires the relative humidity to be maintained at 65 70

The incubation period is 21 days.

<> laying hens have an egg laying cycle of about 500 days. Generally, laying hens begin to lay eggs in about 120 days, 1-2 months later into the peak period of regret, the peak period can generally be maintained for 3-4 months, about 16 months of laying hens will be eliminated by the overall situation.

<> peak laying period of laying hens can generally last for 3-4 months. Laying hens begin to lay eggs in about 120 days, and enter the peak period of egg production 1-2 months after egg laying, and generally eliminate them in about 16 months.

The development of the chicken embryo outside the mother mainly depends on the external conditions, i.e. temperature, humidity, ventilation, egg transfer, etc.

a) Temperature. Temperature is the most important condition for incubation, and the right temperature is required to ensure the normal development of embryos in order to obtain high hatchability and high-quality chicks.

1 Optimal temperature range for embryonic development and optimal temperature for incubation Chicken embryo development has a certain ability to adapt to the ambient temperature, and the temperature is 35, and some eggs can hatch. However, if incubation is carried out in an electric incubator, these temperatures are not optimal for embryonic development. Under the premise that the ambient temperature is controlled, the optimal incubation temperature for the three-dimensional incubator is 10F

The hatch period is 37

2 The effect of high temperature and low temperature on embryonic development.

1) Influence of high temperature Embryo development is rapid under high temperature, the incubation period is shortened, and the embryo mortality rate increases. Chick quality decreases. The mortality rate varies with the magnitude and duration of the temperature increase.

The incubation temperature exceeds 42 and the embryo dies for 2-3 hours. After 5 days of incubation, when the hatching temperature of the embryo reaches 47, all the eggs die within 2 hours. After 16 days of incubation, the hatching rate decreased slightly after 24 hours at temperature; After 9 hours, the hatchability is severely reduced; At 3 hours or 1 hour, all embryos are completely dead.

2) Effects of low temperature Embryonic development is stunted, the incubation period is prolonged, and the mortality rate is increased under low temperature. The incubation temperature is last, and most of the embryos die inside the shell. A small deviation from the upper and lower limits of the optimal temperature will have less inhibition effect on embryonic development after 10 days of incubation, because the self-temperature of the embryo and egg can play a role in regulating it appropriately.

3.Variable temperature incubation and constant temperature incubation system At present, there are two propositions on chicken incubation to temperature in China: one advocates variable temperature incubation, and the other uses constant temperature incubation. Both of these incubation and warming systems can achieve high hatchability rates.

1) Variable temperature incubation method (stage cooling method) The variable temperature incubation method advocates giving different incubation temperatures according to different incubators, different ambient temperatures (mainly hatchery room temperatures) and different embryonic ages of chickens. The reason is: natural incubation (nest chicken incubation) and traditional incubation methods in China, the hatching rate is very high, and they are all variable temperature incubation; Embryos of different embryonic ages require different developmental temperatures.

2) Constant temperature incubation method The incubation temperature of the 21-day incubation period of chickens is divided into: 1 19 days; 19 21 days, 37 or according to incubator manufacturing plant recommended incubation temperature).In general, a constant incubation ratio is used for both phases, and the incubation room temperature must be maintained at 22 to 26

If the temperature is lower than this, it should be heated by exhaust gas, hot air or stoves; If the room temperature is unconditionally raised, the incubation temperature should be increased; If the cooling effect is not ideal, consider appropriately reducing the incubation temperature (lowering.

Laying hens begin to lay eggs in about 120 days 1 to 2 months after laying eggs into the peak period of human egg production, during the peak period of egg production if the chicken's physique is good and there is no disease The peak period can be maintained for 3 to 4 months.

Generally to about 16 months to eliminate can also depend on the amount of egg production, under normal circumstances from 110 days old - about 120 days old to start laying eggs, until about 550 days of age elimination, that is, can lay about 440 days of eggs, if more than 550 days old, in addition to the low egg production rate, the quality of the eggshell is not good, eggs are not easy to sell.

<> laying hens have a farrowing period of about 6 months. Songji farrowing period is the period when the hen's body needs to replenish the energy and various nutrients, and it is necessary to achieve fine management to make it recover as soon as possible, so that it will continue to lay eggs in the next spring.