1. Environmental temperature affects the peristalsis of digestive tract and secretion of digestive enzymes of laying hens, thus changing the emptying rate of food and affecting the digestion of feed. Under high temperature stress, the activities of intestinal protease and amylase decrease, which may be mainly caused by the decrease of enzyme secretion.

2. In actual production, the feed intake decreases by 1~1.5g/d for every l~C increase in ambient temperature of 25-340C, and 4.2g/d for every loC increase from 32-36 C. in poultry equipment manufacturer in china。

3. When the chicken is in the heat stress zone, the animal does not need to produce heat to maintain body temperature due to the inhibition of feed intake and production, and the total metabolism of the body is relatively low. However, chickens need to enhance their metabolic reaction in the process of dissipating the waste heat in the body. Therefore, the metabolic intensity of nutrients in the body is higher than that in the moderate temperature zone.

4, when the high temperature attacks, survival requires heat dissipation, which will cause a series of reactions-heartbeat and breathing faster. These physiological reactions require energy. Energy can only come from the decomposition of proteins, carbohydrates and fats. Energy used for stress cannot be used for egg production, so egg production usually decreases under high temperature stress.

Seasonal changes have a great impact on chickens raised in chicken battery cages. Unsuitable chicken farming methods can seriously impede the production of chickens and the economic benefits of farmers. There are many things to watch out for as the season changes, especially in the summer. The following authors will take you to know what to pay attention to in summer.

1. Reduce energy feed

 In the summer, the hen enters the peak of laying eggs. To achieve good economic benefits, it is necessary to pay attention to adjusting the nutrient composition of the chicken feed in time to ensure the perfection and sufficient nutrition of the diet. Practice has shown that the temperature is closely related to the feed intake of the chicken, and like all poultry, the chicken is “feeding according to energy”. Therefore, the adjustment of chicken feed ingredients must follow the following principles:

The summer temperature gradually rises. If you continue to feed the high-energy feed during the winter, the weight of the laying hen will increase, which will affect the egg production rate. The scientific approach is to reduce the proportion of cereal feeds such as corn in the diet.

2. Improve protein levels

 The hen consumes more protein during the laying period, and its consumption is related to the egg production rate of the chicken. Therefore, the protein raw material in the chicken feed should be increased according to the increase of the egg production rate of the chicken. The method is to add high-quality fishmeal, bean cake, etc. in the diet, and to minimize the amount of chowder when the cost permits.

3. Improve mineral content

When the hen lays eggs, the demand for calcium increases. For example, the calcium deficiency in the chicken feed will affect the quality of the eggshell, thus increasing the broken egg, which will cause the chicken to have soft shell eggs and shellless eggs. Phosphorus deficiency, like calcium deficiency, can also cause discomfort in laying hens, such as cockroaches, cockroaches, and quail eggs. Therefore, once the laying hens are found to have indigestion, loss of appetite, weight loss, etc., the cause should be identified and the content of mineral additives in the diet should be increased accordingly.

4. Vitamin supplements

Especially vitamin D, when the diet is chronically deficient, the egg production of the laying hens decreases, the eggshell becomes soft and thin, and the absorption of calcium is also seriously affected. When the number of chickens is increased, the vitamin consumption is also increased. Therefore, some green fodder can be properly fed, and the amount of multivitamin in the chicken feed can be increased.