Rearing hens in late summer and early fall

In the late summer and early autumn, it is the spring of raising the primiparous hens. The management of the flock during this period is related to the economic efficiency of the chicken farm (household). Therefore, the following management measures shall be taken for the replacement hens: Feeding the transition material in time shall generally feed the 20-week-old chickens with egg forage, which is also called transitional material. The calcium in the material is 1% and the crude protein is 16.5%. When the material is reloaded, the reloading process should be gradually completed within half a month. Avoid overrunning to prevent dialysis. When the egg production rate reaches 2%-5%, the calcium content of the feed should be 3.4%-3.5%, and the crude protein content should be 18%. While controlling the initial body weight in refilling calcium supplementation, we should do a good job in the uniformity of population development, and group large, medium, and small hens in groups to raise them regularly. Avoid sudden increase in material or slashing material, the effectiveness of which can be expressed after 3 weeks, should not be rushed. The weight of light-weight chickens should not exceed the size of medium-large chickens, so as to avoid affecting sexual maturity due to fat deposition. The optimum temperature for laying hens in control sheds is 18°C-23°C. When the outside temperature is lower than 18°C, the nutrients used to maintain the demand will increase; when the temperature is lower than 13°C, it will affect the growth and egg production of laying hens, and the temperature of the chicken house is too low to increase in time. When feeding, chickens will postpone production due to lack of energy. In summer and autumn, the feed intake of laying hens decreases. If the proportion of protein in the diet is not increased in time, it will affect the development of the chicken's reproductive system and delay production. Humidity and ventilation requirements The relative humidity of the chicken house is required to be 55% to 65%. The relative humidity of the house at 1 to 3 days is 70%. After 4 weeks of age, the relative humidity is reduced to about 50%. Humidity should not be too high, otherwise the chicks will have problems such as unclean feathers, loss of appetite, and sickness, which delays sexual maturity and delays production. If the ventilation is poor, harmful gases in the air will increase, the humidity will increase, and the oxygen content will decrease, which will cause the reserve hens to stunt and delay production. Light control and adjustment The replacement hen usually enters sexual maturity at the age of 15 weeks, and natural light during this period is gradually shortened. Due to the short illumination time and the long time to reach sexual maturity, supplemental illumination should be started after 15 weeks of age to meet the needs of sexual maturity. In general, the illumination time after 15 weeks of age should be maintained at the light hours of 15 weeks of age, but the light can not be too strong to prevent the emergence of chicken feathers, toes, backs and other evils. The initial lighting time for laying hens is 13-17 hours a day. Feeding clean drinking water The first-time hens are very important for drinking water. Generally, a hen needs 100-200 grams of water a day. Therefore, laying hens should not be deprived of water every day. It is best to use flowing water tanks for water supply. 3 times salt water, to improve the hen's constitution, increase feed intake. You can also feed some carrots or greens daily to improve the quality of the eggs. China Agricultural Network Editor

Integrated Roughness Profilometer

Roughness Profilometer, also known as surface roughness meter, surface smoothness meter, surface roughness tester, roughness measurement meter, roughness tester, and other names. It has the characteristics of high measurement accuracy, wide measurement range, easy operation, portability, and stable operation. It can be widely used for the detection of various metal and non-metal processing surfaces. This instrument is a pocket instrument that integrates sensors and hosts, with handheld characteristics, making it more suitable for use in production sites. The exterior design is sturdy and durable, with significant resistance to electromagnetic interference, in line with current design trends.

The application fields of roughness meters include:

1. Mechanical processing and manufacturing industry, mainly metal processing and manufacturing. Roughness meters were originally developed to detect the surface roughness of machined parts. Especially, stylus type roughness measuring instruments are more suitable for detecting hard metal surfaces. For example, the automotive parts processing and manufacturing industry, the mechanical parts processing and manufacturing industry, and so on. As long as these processing and manufacturing industries involve the surface quality of workpieces, the detection application of roughness meters is essential.

2. In the non-metallic processing and manufacturing industry, with the progress and development of technology, more and more new materials are applied to processing processes, such as ceramics, plastics, polyethylene, etc. Some bearings are now made of special ceramic materials, and pump valves are made of polyethylene materials. These materials have a hard texture, and some applications can replace metal materials to make workpieces. During production and processing, their surface roughness also needs to be tested.

3. With the continuous strengthening and improvement of the technology and functions of roughness meters, as well as their in-depth promotion and application, more and more industries have been found to require roughness detection. In addition to mechanical processing and manufacturing, roughness evaluation is also required in the production and processing of power, communication, electronics, such as couplings on switches, integrated circuit semiconductors, and even stationery, tableware, and other products used in people's daily lives The surface roughness of human teeth needs to be tested.

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