Technological stress in poultry
Abstract
The article presents the data of domestic and foreign literature on the changes that occur in the bird of industrial cultivation for the development of technological stress. Stress factors are outlined, among which the most significant for the bird organism is the high density of content, the microclimate of the production premises, the conditions of content and composition of the diet, vaccination, transportation. Investigators include high excitability, fear, aggressiveness, anxiety, fatigue, loss of appetite, and disturbance of behavioral reactions of young chickens, quail, ducks, and industrial growth to inadequate changes in external and internal environmental factors. Common signs of stress in the mature chickens, quails, ducks during the development of technological stress set premature mass maturation, decrease and complete cessation of oviposition, reproductive function, weakening of muscle tone. In stress, the activity of all systems of an organism, directed on self-defense and adaptation to new conditions of existence, strains. A prerequisite for the development of stress-reaction is to strengthen the function of the glands of the inner secretion and especially the hypothalamus system – the anterior part of the pituitary gland – the adrenal cortex. It has been established that in the process of adaptation of the organism to the action of adverse factors the concentration of blood sugar increases due to the cleavage of the glycogen in the liver, the mobilization of lipids from the fat depots increases, the intensity of metabolic processes in the adipose tissue increases, and this ensures an increase in the concentration of fatty acids in the blood. The negative influence of stress factors on resistance, immunological reactivity, microbiocenosis state, functioning of the digestive system, preservation and productivity of the bird population are shown. These states are directly related to the activity of the hormonal and autonomic nervous systems and are determined by nonspecific protective factors of the organism. Different ways of correction of disturbed homeostasis are shown. The effectiveness of the use of probiotics, symbiotics, humic substances in the poultry diet is given to prevent the development of negative stress phenomena in their body. It is proved that the management of the processes of development of adaptive ability of the bird organism is one of the key aspects of the development of the corresponding complex of technological measures of their growing and feeding that is conducive to the increase of economic efficiency. The search for methods for the prevention of stress in poultry farming is aimed at eliminating the etiological factors of stress, the removal of birds resistant to stress, the use in feeding substances that reduce the response to the action of adverse stimuli or increase resistance to the organism. Affecting the formation of adaptive reactions of the bird organism long before the stress, as well as in the development of the adaptive syndrome, it is possible to implement its prophylaxis, that is, to ensure the consistent functioning of all physiological systems and the activation of protective forces through the use of biologically active harmless feed additives in diets.
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