How to reduce the breakage rate of eggs in high temperature season

The problem of breakage of eggs has been plaguing every farm, especially in the high temperature season, when the temperature is high, the preservation time of eggs is short, and the damaged and contaminated eggs deteriorate within 2 days. Therefore, here are several ways to reduce the damage rate in the high temperature season:

Environment and temperature

The physiological characteristics of laying hens determine that the ideal temperature for laying hens is 18 ℃-23 ℃, and the production performance is the best in this range; when the temperature exceeds 30 ℃, the feed intake of laying hens decreases, the amount of drinking water and feces increases; when the room temperature exceeds 32 ℃, the laying rate decreases obviously, and in serious cases, it can lead to heat stress. In order to maintain high yield and reduce the breakage rate of eggs in high temperature season, the environment must be controlled.

Controlling the temperature and humidity in the house and increasing the hardness of eggshell at high temperature can reduce the feed intake of laying hens and affect the deposition of calcium salt, so that the quality of eggshell decreases and the number of wrinkled eggs increases. In the environment of high temperature, ice can be placed in the henhouse. Wet curtain or cold water spray is used to cool the temperature; the hardness of the eggshell is also related to humidity, the greater the humidity, the smaller the hardness of the eggshell, the higher the damage of the egg.

Installation of ventilation machinery to keep the henhouse well ventilated, leaving no dead corners, laying hens in high temperature environment to enhance respiratory vitality, exhale more carbon dioxide, on the one hand, lead to respiratory alkalosis, on the other hand, reduce calcium carbonate in the blood, resulting in weakening of shell gland secretion, calcium carbonate deposition, eggshell can not be fully formed, so the eggshell becomes thinner and the strength is reduced.

Reducing all kinds of stress and noise adding various vitamins can reduce heat stress, especially Vc can promote the metabolism of minerals in bones and increase the concentration of calcium in plasma. If 200-400mgVc was added to the diet of laying hens per kilogram of feed, it could alleviate heat stress, increase feed intake, increase the utilization of Ca in bones, increase the laying rate, increase the hardness of eggs and reduce the breakage rate.

Improve feed nutrition

Under the condition of high temperature stress, the feed intake and laying rate of laying hens decrease, so it is very important to improve the nutritional conditions in feed and maintain the heat balance of hens.

According to the feeding standard of laying hens, the main factors affecting the quality of eggshell are the content of calcium, phosphorus, manganese and vitamin D3. First of all, attention should be paid to the content of calcium in the laying feed, which affects the thickness, strength, weight and calcium content of eggshell. With the increase of dietary calcium level, the thickness, strength and weight of eggshell increase curvilinear, and increase to the maximum when the level of calcium in feed reaches 4.0%. The thickness, hardness and weight of eggshell are sensitive indicators to evaluate the calcium nutritional requirements of laying hens. The dietary calcium level of laying hens at the age of 20 mures and 40 weeks should be 3.3% Mur4% (daily calcium intake is 4.18g). However, when considering the Ca demand of laying hens, the dietary protein content of laying hens should also be taken into account. Secondly, the content of available phosphorus in the feed should be ensured. Although the eggshell contains less phosphorus (about 20mg), it determines the elasticity and toughness of the eggshell. Phosphorus in feed mainly exists in the form of phytic acid phosphorus, only about 30% can be absorbed and utilized, and it is usually required that the content of available phosphorus in the diet should reach about 0.4%. In addition to the available phosphorus, the appropriate imbalance of Ca and P ratio should also be considered to affect the absorption and utilization of Ca and P by hens. In general, the total phosphorus in the feed of laying hens is 0.6%, the available phosphorus is 0.5%, and the available phosphorus in the total phosphorus is 80%, 80%, 90%, Ca, P, and the proportion of P is 4%. Add appropriate amount of VD3 and Mn, VD3 to promote intestinal absorption of Ca and P, and improve the level of Ca and P in blood. The general addition amount is 0.1% 0.15%. The results show that the replacement of inorganic phosphorus in feed by phytase can significantly improve the quality of eggshell and reduce the rate of egg breakage. The addition of 55g-60g manganese per ton feed can not only meet the needs, but also make the quality of mature eggshell the best.

Layer diets supplemented with calcium should have a certain particle size and pay attention to the fact that its soluble eggshell generally begins to deposit at dusk. In the afternoon, hens are provided with soluble powder particles such as stone powder, so that the supplementary Ca can be directly used in the process of eggshell formation and improve eggshell quality.

Adding a certain proportion of NaHC03 can significantly improve the quality of eggshell. Hydrogen phosphate ion in blood is the main source of calcium phosphate in eggshell. 0.1% NaHCO3 1.0% different levels of NaHCo3 were added to the feed of laying hens for 8 months.

Feeding and management

Prevent chicken alarm, avoid stress and fixed working procedures: turn on lights, feed, drink water, clear dung, scrub, disinfect regularly, prevent disruption of the "biological clock" to prevent alarm. All kinds of work should be careful to prevent rough work, noise and interference, reduce the number of chicken catching, and increase the noon rest time.

Keep adequate and clean water to relieve heat stress.

Appropriately increase the number of egg picking, the peak of egg production is within 3-4 hours after sunrise, and the number of eggs laid in the afternoon only accounts for 20% of the total amount of eggs in the day. Therefore, eggs should be picked up at least twice in the morning and once in the afternoon in order to effectively reduce the number of broken eggs.

Separate yards when handling, handle with care, preferably with egg receptacle.

In short, reducing the production of broken eggs is an important part of improving economic benefits in summer. As long as attention is paid to subtle aspects, the damage rate will be reduced to a minimum.