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How to reduce the breakage rate of eggs? The cause of broken eggs

2017-12-09 09:03 Source:

Egg breakage is a common phenomenon in laying hens. Egg breakage rate is an important indicator to measure the quality of eggs. Under normal circumstances, the average breakage rate of eggs is 0.5-1%. If it is more than 2%, it means that the eggs are damaged abnormally. At this time, we should carefully find out and analyze the causes of egg breakage, and timely take necessary remedial measures to improve the quality of eggshell and reduce the rate of egg breakage, According to estimates, taking 10000 commercial chicken farms as an example, the egg breakage rate is reduced by 1% every day, and the profit can be increased by nearly 40 yuan per day. Let's have a specific understanding: how to reduce the breakage rate of eggs? The reason for the broken eggs.

 Henan shepherd boy breeding equipment Co., Ltd

1. The main causes of egg breakage

The layer itself is the culprit. There are obvious differences in the quality of eggs produced by different breeds of layers. Generally, brown eggs are harder than white ones, and the damage rate of local varieties is lower than that of imported ones. The eggshell strength of the eggs produced by prolific hens is less than that of low yield hens. In addition, with the growth of chicken age, the egg gradually increases, while the egg shell quality remains unchanged, resulting in the increase of egg surface area, thus reducing the relative weight of eggshell and increasing the damage rate. Studies have shown that the damage rate of laying eggs at 4-5 weeks old is 1%, and that of laying eggs at 50 weeks old is as high as 6%. On the other hand, the primary culprit is that the formation of vitamin D3 in the body decreases with the increase of chicken age, which affects the absorption and utilization of calcium, leading to the lack of eggshell calcification, resulting in lower eggshell quality and higher damage rate.

Nutrients. If the nutrients related to eggshell quality are deficient or insufficient in the diet, the quality of eggshell formation will be affected and the breakage rate will be increased. It includes calcium. Generally, the calcium requirement of laying hens is about 2.2 g. it is appropriate to add 3% - 3.5% in the diet, and 4% in the peak period of laying, otherwise, it can not meet the demand of calcium for laying hens. Although the content of phosphorus in eggshell is less, its content determines the elasticity and toughness of eggshell. However, if the content of available phosphorus in the diet exceeds the standard, it will interfere with calcium from bone into blood, resulting in laying fatigue in cage laying hens. Vitamin I). It plays an important role in the absorption and utilization of calcium and phosphorus. If it is lack, it is not conducive to the formation of eggshell, which makes the quality of eggshell decline and easy to be damaged. In addition, the lack or deficiency of some minerals and trace elements will also affect the quality of eggshell, for example, the content of manganese is too low, the proportion of eggshell will be decreased, and the high magnesium content will cause the feed intake of chicken to decrease and the breakage rate will increase. In addition, the acidity of the diet will also affect the quality of eggshell. If the acidity of the diet is too high, the quality of eggshell is poor, and improving the alkalinity of the diet is beneficial to improving the quality of eggshell.

Management is bad. When the stress reaction occurs, the physiological function of layers will be disordered, which will affect the formation of eggshell, resulting in the decline of eggshell quality and the increase of breakage rate. If the feeding and management of laying hens is not in place, the laying age of laying hens is too early and the weight is too light. Because the laying hens should not only maintain their own growth and development, but also bear the burden of laying eggs, the laying rate and the quality of eggshells will be reduced. The frequency and time of picking up eggs are important factors affecting the breakage rate of eggs. Generally speaking, the less the times of picking up eggs, the higher the breakage rate. The results showed that the breakage rate of eggs collected more than 4 times a day was 1% - 3% lower than that of eggs collected once a day.

Environmental factors. The damage rate of different seasons is different, usually lower in winter and the highest in summer. Under the high temperature environment in summer, the quality of eggshell is poor, which is mainly due to the decrease of feed intake and calcium intake of laying hens. In addition, the laying hens are prone to heat stress in high temperature environment, which leads to the decline of eggshell quality. In addition, the irrationality of illumination is also the main cause of egg breakage.

The disease of ferocious element. In the breeding production, many diseases will affect the quality of eggshell, such as Newcastle disease, infectious bronchitis, egg drop syndrome, etc., when the laying hens suffer from this disease, it will lead to the decrease of feed intake, the intake of calcium and phosphorus will be insufficient, and the reproductive system of laying hens will be damaged, such as salpingitis, or the secretion of glands promoting the formation of eggshells will be reduced, which will affect the shape of eggshells Yes.

2. Ways to reduce egg breakage

In order to select a good breed before breeding layers. According to the nutritional needs of layers at different stages, adequate nutrition should be provided to ensure that the proportion of protein, energy, minerals, vitamins and other nutrients in the feed is reasonable, especially the content and proportion of calcium and phosphorus in the diet. The addition amount of calcium and phosphorus should be determined by the physiological stage of laying hens. Generally, the content of calcium is 3.2% - 3.5% When the egg rate reaches 70% ~ 80%, it can be increased to 3.6% ~ 3.7%, and it can be increased to 4% during the peak period. In addition, it is very important to ensure the content of vitamin I in the diet to promote the absorption and utilization of calcium and phosphorus, which is very important for improving the quality of eggshell.

Strengthen the daily management of laying hens, install cages reasonably, and the design of cages should be scientific and reasonable to avoid the damage of eggs caused by unreasonable cages. In the breeding process of laying hens, we should try our best to avoid the stress reaction of laying hens, prevent the abnormal peristalsis of fallopian tubes and the production of eggs ahead of time. In this case, we should pay attention to keep the environment of the hen house quiet. Try to be light in your daily work. Reasonable arrangement of egg picking times per day can appropriately increase the number of egg picking, significantly reduce the collision and pecking between eggs, which can effectively reduce the damage rate. When picking up eggs, we should pay attention to picking up and putting them gently.

To strengthen the management of the breeding environment, especially to do a good job in summer to prevent heatstroke. Cooling facilities and ventilation equipment should be installed in the chicken house. Effective measures should be taken to reduce the house temperature in the high temperature season. Baking soda or vitamin C can be added to the drinking water or feed of laying hens to prevent heatstroke. Reasonable illumination should be given to the chickens, the feeding density should be adjusted, the concentration of harmful gases in the house should be reduced, and the comfort degree of chickens should be improved.

In order to improve the disease resistance of chickens, the prevention of diseases should be done well, the daily management should be strengthened, and the reasonable feeding should be carried out. The breeding environment should be disinfected regularly to kill pathogenic microorganisms. Do a good job in the immunization of related diseases, and timely treatment should be carried out if chickens are found sick.

 Henan shepherd boy breeding equipment Co., Ltd

1、 The factors of egg itself are the breed and quality of chicken. The strength of eggshell is affected by heredity, and there are some differences between varieties and quality. Generally, the breakage rate of brown shell egg is lower than that of white shell egg, and the breakage rate of chicken with more eggs is higher than that of chicken with less production.
Weeks old. After laying, with the increase of age, the surface area of egg will also increase, and the strength of eggshell will decrease. Therefore, the larger the week age is, the higher the damage rate will be.
The laying posture of a chicken. There are differences in egg laying posture among different qualities and individuals. For caged chickens, the eggs produced by standing or squatting higher than those lying or squatting lower have a higher breakage rate.
Time of laying eggs. The eggs laid in the afternoon are lower than those in the morning due to the lack of light needed to absorb calcium at night.
Health status. A variety of diseases have an impact on eggshell quality, such as infectious bronchitis, which can make the structure of eggs abnormal, irregular shape, increase the rate of egg damage.
2、 Calcium, phosphorus and vitamin D have great influence on eggshell quality. In general, the dietary calcium requirement of laying hens should be 2.7-3.75%, which is 3-4 times higher than that of 0.9% of non laying hens, and the dietary phosphorus requirement of laying hens should be 0.5%. Vitamin D can promote the absorption of calcium and phosphorus, such as in the case of vitamin D deficiency, even if the laying hens are fed with rich calcium and phosphorus, soft shell eggs will be produced.
3、 The higher the house temperature, the more damaged the eggs. In summer, the eggshell of chicken eggs is usually about 5% thinner than that of other seasons. The main reason is that high temperature will reduce the feed intake and calcium intake. In addition, in high temperature environment, if the relative humidity is high, the heat dissipation of chicken is not good, which will also make the damage of eggs more serious.
4、 Management staff's sense of responsibility. This is a major factor. When picking up eggs, putting eggs, carrying egg boxes and weighing, whether to handle them with care or not has a great impact on the damage rate of eggs.
Daily management. The damage rate of eggs will increase if the feeding density is too high, the eggs are not picked up in time, the laying boxes are few, and the bedding grass is too little.
Improper vaccination. If vaccinated in the laying period, due to the immune response, within a few days after vaccination. In addition to the decline in egg production, the rate of egg breakage will also increase.
5、 Chicken cages and egg containers are easy to cause egg damage in equipment.
Type of cage. Due to the different arrangement of cages and the situation of eggs passing through the egg trough, the damage rate will also be different. Generally, the damage rate of single-layer cages is higher than that of multi-layer cages. The reason is that two rows of cages share the same egg trough and the egg trough is under the material trough, and it is not easy to detect and repair the fault in time.
The wire in the bottom net of cage body is too thick, with poor elasticity and insufficient inclination, or the egg trough of the lower cage is often deformed, bent, pressed and broken, and the egg collecting belt is skewed. There is no egg guard under the net in front of the cage, or the eggs of the upper cage are pecked by the chickens of the lower cage, especially the ladder type.
Egg container. Eggs are packed in iron buckets, wire baskets or wooden cases with rough inner walls and even exposed nails, or eggs are over filled and overlapped, and the grooves of egg holders are too large or too small. In addition, uneven roads in the yard, too fast cart or driving will increase the damage of eggs.

[editor in charge: Admin]
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