In laying hens, it is often encountered that laying hens cannot enter the peak of egg production. This is reflected in the short laying period and low feed conversion rate. The comprehensive analysis of common causes is as follows:
Feeding management
The density of the rearing is too large due to the constraints of funds, venues, etc., or the size of the rearing chickens pursues the rearing scale, and the density of brooding and breeding is generally high. The first week of brooding density is generally 30 per square meter, and the actual high one-fold is more common, even two to three times higher. Some chicken farmers do not change the rearing density from chickens to baskets, and they cannot be grouped on time in the early stage, making it difficult for the chickens to achieve body length and weight at the age of 6 weeks, directly affecting the quality of brooding and broilers.
Poorly ventilated brooding In order to keep warm, doors and windows are sealed tightly. With the increase of density, secretions and excrement are increased. The use of powdery materials, feathers and dander are shed, and the air inside is extremely dirty. Chicks grow in such environments and are prone to tearing, sneezing, and arthritis, which can seriously affect the quality of growing chickens.
Poor uniformity of chickens Because the effective space for brooding is seriously insufficient, the number of early barrels and drinking fountains cannot be large. With the continuous growth of chicken age, the development of the chicken's physique, the chicken can only be divided into several rounds of feeding and drinking water in the case of no increase in drums and drinking fountains, and the number and quality of feeds per chicken vary. Causes poor bird uniformity.
Different prevention measures and different lighting systems also contributed to the poor uniformity of chickens in the entire chicken house, which ultimately led to the lack of peak production.
Different batches of chickens are bred by individual chicken farms (households). Breeding chickens of different ages in the same house can not be caused by different feeding management, different control measures, different lighting systems, etc. according to their age. The chicken production rate in the whole chicken house is low.
The difference between the maturation of mature precursors and sexual maturation is generally divided into two cases. One is that the uniformity of the flock is less than 80%, the coefficient of variation is more than 10%, the average weight is lower than the standard lower limit, and the age of laying eggs is relatively early. The egg production rate has been rising for a long time. It shows that the peak of egg production is not high, the peak duration is short, the weight of eggs is light, and the death elimination rate is high. The other is that the uniformity of the flock is less than 80%, the coefficient of variation is more than 10%, the average weight is higher than the upper limit of the standard, the age of egg production is late, the consumption of material in the whole period increases, the ratio of material to egg is high, and the economic benefit is low.
Insufficient light stability or strength during the production phase Practice has shown that laying hens can meet the demand for peak egg production every 14 hours to 15 hours a day. Due to other factors, 16 hours of lighting is now commonly used. Be sure to switch the light on time when you fill the light, otherwise it will disturb the response of the layer of chicken to light stimulation. Electric lights should be installed at a height of 1.8 meters to 2 meters above the ground. The distance between the lamp and the lamp is equal. The 40 watt bulb should be gradually extended to supplement the light. When entering the peak period, the light should be relatively stable and the intensity should be suitable.
The peak egg laying period of laying hens with irrational laying hens is between 25 weeks and 35 weeks old, and the laying rate is generally above 90%. During this period, laying hens have the most vigorous phenotype and must use this precious value effectively. Period of time. If brooding in early spring, the peak period of chicken production in the summer is in the summer, due to the hot weather, chicken feed intake decreased, most of the chicken farm cooling measures are not effective, or although a certain degree of cooling measures, but it is difficult to achieve chicken eggs The most suitable temperature during the period; due to the hot weather, the use of wet curtains to reduce temperature, so that the humidity within the house increases, a large number of E. coli growth and reproduction, the chicken susceptible to E. coli disease, which can easily lead to difficult to achieve the laying hens peak.
Feed quality problems
Inferior feed The quality of the feed currently on the market varies depending on the production area, unit, and batch. If the raw materials in the feed are not tested and analyzed, that is, according to the conventional nutrient content and instructions for use, there may be no peak production problems after feeding the chickens; in addition, take the same material, raise different varieties, and different Feathers and chickens of different sizes can hardly satisfy chickens' needs for metabolic energy, crude protein, amino acids, calcium and phosphorus.
The feed label is inconsistent with the intrinsic quality. If the level of crude protein in feed is relatively low, but the proportion of chow is high, the utilization rate of feed will be very different. Most of the chicken farmers do not pay attention to this point, and do not use the total consumption. The material, body weight gain, dead scouring rate, egg production, ratio of eggs to eggs, and the weight of chickens eliminated are calculated as general ledgers, but they are blinded to the price of certain feeds.
Disease infestation
The use of maternal diseases, immunosuppressive diseases, and non-SPF vaccines puts chickens in a subclinical state of the disease; immunization procedures are confusing, and immunization programs on a book or company or a research institution cannot be used to establish an immunization program in conjunction with local epidemics. For diseases that can monitor antibodies in the laboratory, there is no scientific immune monitoring, and there are variability in antibodies to chickens. The early onset of infectious diseases causes permanent damage to the reproductive system (such as infectious bronchitis), making it difficult for chickens to reach their peak in laying eggs.
The basic principle of the development of the immunization program is prevention and treatment. For key diseases, common diseases, and severe diseases, it is necessary to focus on fortification, the disease is changing, and the epidemic prevention program is also looking for a balance in dynamics. It is crucial that the egg breeder reaches the rising stage of egg production. E. coli disease, chronic respiratory disease, and atypicality Newcastle disease and bird flu are most likely to occur. Therefore, immunization and prophylactic administration are quite necessary. However, this is often the most difficult period for raising chickens (the peak of investment). Frequently, immunization measures are taken to cause chicken disease and the production potential of flocks cannot be fully exploited. .
Double anti-fog double films face shield
Double anti-fog double films face shield
Dongguan Marvec Electronic Technology Co.,Ltd , http://www.marvec-cn.com