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How to manage the expected laying period of laying hens in high temperature and humidity during summer?

Release time:

2023-06-13

Recently, most regions have ushered in true summer, with temperatures soaring to over 30 degrees Celsius. High summer temperatures can easily cause poor appetite, low food intake, and substandard body weight in chicken flocks. At the same time, high temperature and humidity can easily cause mold growth and decrease the body's immune system. As a stage of rapid physiological development for laying hens before laying, inadequate management of the due date can lead to a series of problems such as anal prolapse, pecking, substandard starting weight, and slow peak speed, resulting in huge economic losses.

How to manage the expected laying period of laying hens in high temperature and humidity during summer?

1、 Characteristics of growth and development of laying hens during the expected delivery period

The expected delivery period is the peak period of reproductive system development in a flock of chickens, with a significant increase in the volume and weight of the ovaries and fallopian tubes. Before and after laying, the pubic bone and Cloaca of laying hens expand, which is conducive to the formation and production of eggs, and their ability to store calcium is significantly enhanced.

The expected delivery period is a critical period for the chicken population to reserve energy, which determines the length of peak maintenance time; It is a critical period for antibody reserves, which determines the health level of the chicken population during the peak egg production period; It is the starting period of the chicken herd, and the weight determines the light stimulation plan, thereby ensuring the suitability of weight and the periodization of the starting period.

2、 Management of expected delivery period

Management of body weight and tibia length of chickens during the expected delivery period of 01

Within the range of no more than 110% of the average body weight, the larger the body weight of the 18 week old chicken group, the earlier the egg production peak, the longer the peak maintenance time, and the lower the mortality rate.

The length of the tibia represents the developmental state of the bones throughout the body, and the longer the tibia, the larger the chicken's skeleton and the more complete the pubic bone development.

The expected delivery period should ensure that the weight and tibia length of the chicken flock meet the standards. If the weight meets the standard but the shin length does not meet the standard, there will be a situation where the laying weight is small, the peak laying time is short, and the mortality rate is high. If the weight does not meet the standard and the tibia length meets the standard, the chicken herd will start production later and affect the breeding efficiency. For chicken flocks whose expected birth weight and tibia length do not meet the standard, it is necessary to increase the nutritional concentration of the diet; Add 1-2 hours of light at night to prolong the feeding time of the chicken flock.

02 Lighting management of chicken coops during the expected delivery period

Lighting management mainly refers to the management of lighting time and intensity.

In terms of lighting time, it is necessary to determine the age of the day for adding light, and then determine the frequency and duration of adding light to form a stable program of adding light. The age of adding light should not be later than 126 days old. The frequency of adding light is to add 1 hour of light per week at the beginning, and after adding it to 12 hours, it will increase by 0.5 hours per week until reaching the peak of egg production at 14 hours. From now on, add 0.5 hours every two weeks until it reaches 16 hours. The light intensity remained at 15 Lux for 15-18 weeks, and increased to 20 Lux after 19 weeks.

Ventilation management of chicken coops during the expected delivery period of 03

During the hot season, it is necessary to meet the high ventilation demand of the chicken flock. When longitudinal ventilation is adopted, the ventilation level shall be adjusted according to the change of external temperature, the wind speed in the shed shall be increased, and the Apparent temperature of the chickens in the shed shall be reduced. The wind cooling effect of wind speed increases to 30 ℃ and begins to decrease. When it exceeds 35 ℃, relying solely on wind speed can no longer have a cooling effect on chickens. Therefore, when the temperature in the chicken house exceeds 30 ℃, start to start the wet curtain evaporation and heat dissipation to reduce the temperature of the chicken house.

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