Summer Egg Breeding Breeding Treatment Measures

Effect of a Heat Stress on Egg Breeders

1 Decreased feed intake

When the temperature in the house is higher than 27°C, the temperature and feed intake are negatively correlated. For every 1°C rise, the feed intake will decrease by 1.5%-2%, and the corresponding egg weight will also decrease. The temperature is 27 For every 1°C increase above °C, the egg weight will drop by 0.2-0.3 g.

2 Thinned shells, increased breakage

For every 1°C increase in temperature above 270°C, the broken egg rate will increase by 1%.

The fertilization rate of 3 kinds of chickens decreased

When the ambient temperature reaches 30°C, there is a temporary inhibitory effect on spermatozoa that can affect the quality of semen. When the semen is in a high temperature environment, the spermatozoa dies faster, leading to deterioration of semen quality. At the same time, the chicken body is exposed to heat when the chicken is in a high temperature environment. Affected by the impact, feed intake, viability, semen quality, and egg quality will all decline, and it will also have a certain impact on the fertility rate.

Second summer cooling measures

1 Configure a reasonable chicken house cooling system

Closed houses use fans and curtains for cooling. Since the temperature sensed by the flock (sense temperature) is different from the temperature measured by the thermometer, the absolute temperature and air flow of the house must be changed rapidly, and the age, sex, and environment of the house should be taken into consideration. The faster the air flow rate, the greater the difference between the sensory temperature (lower) of the chicken and the recorded value (high) of the thermometer. The smaller the age of the bird, the greater the effect of wind-induced air-cooling.

In general, the wind speed of the back of the chicken is preferably 2 to 3 m/s, more than 3 m/s, and chickens will have conditional diseases such as diarrhea. When the outside temperature is higher than 30. c, need to use a curtain to cool. The opening and closing of the water curtain should be coordinated with the fan. When the temperature rises, first increase the ventilation and wind speed, observe the temperature of the chicken house, and when the temperature continues to rise, turn on the water curtain to cool, and use the water curtain should be gradual, to avoid sudden cooling Causes cold stress in the flock. Use the curtain system to close other air inlets to ensure that the curtain wind speed reaches 1.8 to 2.0 m/s (Note: The wind speed cannot be too high, otherwise it will cause diarrhea and other conditional diseases), and the temperature inside the house Keep above 26°C. When the outside weather is in the high-temperature and high-humidity stage, the water curtain cooling system cannot be started at this time, and the disinfecting pump needs to be used to cool the flock of cold water.

2 Stimulating chickens to eat

The purpose of heatstroke cooling is to allow the birds to eat more during the hot summer months and to ensure that the birds themselves need the energy materials. In addition to using the cooling system, it is necessary to adjust the feeding and management of the flock during the hot summer months.

(1) Adjust the nutritional level in the feed. The protein content of laying hens in hot season should be increased by 1-2% compared to other seasons, reaching over 18%. Reserve hens should ensure their proper body weight and body condition, add sodium bicarbonate and increase the amount of vitamins. Changes in diet should be carried out as early as possible before the onset of heat stress, and gradually adjust to adapt the chicken. It is also possible to add heat-stress-resistant drugs to the feed, for example by adding 0.02% to 0.04% vc to the feed, which can moderate the heat stress of the flock.

(2) Adjust the feeding time. Feed as much as possible during the cool days of the day to allow the birds to eat more at cool temperatures, from 4:00 to 5:00 in the early morning and chickens from 6:00 to 7:00 in the evening. There is also a method of increasing light intake at night to increase the feed intake of summer chickens. It must be done 3 hours after the light is turned off, which is about 1 hour longer. However, it should be noted that the time from turning off the lights to turning on the lights again must be longer than the light turn-off time before eating.

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