Definition of stress: A series of neuroendocrine reactions and metabolic changes occurring in a relatively constant pattern after the body is stimulated by various stimuli to maintain the stability and balance of the body's internal environment.
1.Environmental stress:
(1) high temperature, cold, rain, excessive daily temperature difference, excessive humidity;
(2) noise, abnormal sound;
(3) the presence of various harmful gases;
(4) light disorders;
2. Stress caused in management:
(1) density;
(2) forced feathering;
(3) vaccination;
(4) beak breaking;
(5) increased density;
(6) feed restriction and feed replacement;
(7) trauma;
(8) capture, flock transfer;
(1) Lead to poor chicken development, reduced breeding rate and survival rate;
(2) lead to the reduction of egg weight and poor egg quality;
(3) Reduced fertility;
(4) Increase in vitamin requirements due to stress, leading to vitamin deficiency;
(5) Decreased immunity and increased morbidity of chickens.
(1) Ensure sufficient clean drinking water
(2)Control the temperature well
(3) Strengthen ventilation in the poultry house;
(4)Keep the light stable;
(5)Reduce the disturbance in beak breaking and flock transfer;
(6)Regulate the air environment in the chicken house;
(7) vaccination to reduce stimulation
(8) Reduce feeding density;
(9)Keep feed stable
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