The laying hen is its own culprit. There are obvious differences in the quality of eggs produced by different breeds of laying hens. Usually, brown eggs are harder than white eggs, and the damage rate of local breeds is lower than that of imported breeds. The strength of eggshell produced by high-yielding hens is lower than that of low-yielding hens. In addition, with the growth of chicken age, the eggs gradually increase, while the quality of the eggshell remains unchanged, and the surface area of the eggshell increases, so that the relative quality of the eggshell decreases and the breakage rate increases. Studies have shown that the breakage rate of laying eggs at 4-5 weeks of age is 1%, and that of laying eggs at 50 weeks of age is as high as 6%. On the other hand, the increase of chicken age and the decrease of vitamin D3 formation affect the absorption and utilization of calcium, resulting in inadequate calcification of eggshells, resulting in lower quality of eggshells and higher breakage rate.
Nutrient element. If nutrients related to eggshell quality are deficient or insufficient in the diet, the quality of eggshell formation will be affected, resulting in an increase in the rate of breakage. It includes calcium, which is usually about 2.2 g for laying hens. 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 laying hens for calcium. Although the content of phosphorus in eggshell is less, its content determines the elasticity and toughness of eggshell, but if the content of available phosphorus in diet exceeds the standard, it will interfere with calcium from bone to blood, leading to egg fatigue in caged laying hens. Vitamin I). Absorption and utilization of calcium and phosphorus play an important role, if lacking, it is not conducive to the formation of eggshells, which will reduce the quality of eggshells and easily cause damage. In addition, the lack or insufficiency of some minerals and trace elements will also affect the quality of eggshells. For example, too low manganese content will lead to a decrease in the proportion of eggshells, and high magnesium will lead to a decrease in feed intake and an increase in the rate of breakage. In addition, the acidity and alkalinity of diets also affect the quality of eggshells. Excessive acidity of diets and poor quality of eggshells are beneficial to improve the quality of eggshells.
Management is fierce. When the stress reaction occurs in laying hens, the physiological function will be disordered, affecting the formation of eggshells, resulting in the quality of eggshells decline and the rate of damage increased. 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 low. Because the laying hens have to maintain their own growth and development and bear the burden of laying eggs, the laying rate and the quality of eggshells will be reduced. The number and time of collecting eggs is an important factor affecting the breakage rate of eggs. Generally speaking, the less the number of collecting eggs, the higher the breakage rate. Practical results show that the breakage rate of eggs collected more than four times a day is 1%-3% lower than that of eggs collected once a day.
The environment is fierce. The damage rate is different in different seasons, usually lower in winter, the highest in summer, and the quality of eggshells is poor in high temperature environment in summer. This is mainly due to the high temperature environment, the decrease of feed intake and the insufficient calcium intake of laying hens, and the heat stress easily occurs in high temperature environment, which makes the quality of eggshells decline. In addition, irrational illumination is also the main cause of egg breakage.
The disease is very dangerous. Many diseases will affect the quality of eggshells in the production of aquaculture, such as Newcastle disease, infectious bronchitis, egg loss syndrome, etc. When the laying hens suffer from this disease, it will lead to a decrease in intake, inadequate calcium and phosphorus intake, and also damage the reproductive system of laying hens, such as salpingitis, or promote egg production. The gland secretion of shell formation decreased, which affected the formation of eggshell.
The unreasonable bending angle of eggs in the cage is also one of the reasons for the breakage of eggs.Our Asia standard egg cage equipment is your best choice,the angle of our cage is 6°.