The effect of dietary Glutamine supplementation on performance and blood parameter, carcass characteristics, quality and characteristics meat of broiler chickens under continuous heat stress condition
Published:February 28, 2019
Summary
Introduction Heat stress is one of the major problems of poultry in heat areas of the world including Iran, especially in summer, leading to reduced performance, the production, feed intake, growth rates and effective use of the feed (Sahin ., 2009). In general, birds have a thermal comfort zone, which ranges between 18 to 22 ° C and no problem for the physiological regulation of body...
Good work, with seemingly coherent results. There is a single issue where I would like to make a consideration, regarding the fact that the performance of the birds in the phase from 0 to 21 days, contrary to what happened in the 22 to 42 days, was not influenced by the levels of glutamine. I believe that this variation of results would be related to the fact that the temperature of 32 º represents a lower intensity of stress when applied in the phase of 0 to 21 days, compared to the phase of 22 to 42 days.
Juarez Donzele Hello doctor
The temperature conditions we tested were 32 ° C from the beginning to the end of the design.
This may have led to subtle changes, due to the adaptation of broiler chicks to the climate.
That is, in the 0 to 21 days the food and water habitual habits are in the range of 21-42 and the stability of the body with the environment.
A lot of research has to be done because the results are the same and very small.
Mustafa Ayazi, while understanding his point of view, continues with the view that the difference in bird performance between phases would be related to the fact that the temperature of 32 C represents a lower stress intensity for birds from 0 to 21 days, compared to 22 to 42 days of age. However, I think it is important to emphasize that in biology there is no absolute truth.
@Juarez Donzele Hello, thank you very much. Our research is for the tropical regions located in the south of the country where the heat is constant and continuous. The goal was to improve production performance, antioxidant protection to prevent losses in advance and improve carcass quality by maintaining the level of acidity and malondialdehyde to prevent spoilage during freezing and storage in the refrigerator. There were tensions in the work, especially maintaining heat throughout the period with heaters or mothers, which were mostly old and used gas fuel and which were accompanied by the production of carbon dioxide, which sometimes could affect the growth of poultry due to ventilation. I hope that more research will be done and a cheap solution will be given.
Based on the author's conclusion, it was concluded that although dietary Glutamine consumption can improve the performance of broiler chickens during the grower and whole period under heat stress, but it doesn’t affect the performance during starter period or blood parameter at week 6 of age. Thus, the lack of significant effect during the starter period may be due to high temperature requirements for broilers (34-32) compared to the grower period (~28ºC) after 3 weeks of age. Thus, the critical or broken point for heat stress in broilers in greater than 29ºC after 3 weeks of age.
Youssef Attia Hello doctor The conditions of the laboratory for the simulation of tropical regions in the country, such as the southern regions of Iran, are Bushehria, Kerman. The temperature rises to 42 degrees in the summer. The aim of the study was to investigate the changes in glucose supplements and glucose levels in broiler chicks in these areas. It is true that the effects of blood factors have not been meaningful or somewhat meaningful for some, but the results indicate the effect on the function due to complementary effects in improving the status of antioxidants and the immune system's factors. Most importantly, it may have been due to the proteins of the intestines from radionuclide destruction. When we look at performance numbers, the results indicate that the Factor Factor or FC, although not meaningful, was effective in controlling the control without glutamine, indicating that the bird's physical condition and their consistent increase at the end of the course, and this factor has led to weight gain in the growth period.
Dear Mustafa, thanks a lot for your article. The antistress action of glutamine is caused by central position of these amino acids in transferring of amino groups. So, in this way glutamine is highly increasing their spectra of biochemical reactions, responsible for antistress action. You can support glutamine by betaine and carnitine. Probably these substances can give a synergic effect. Best wishes to you.
The effect of dietary Glutamine supplementation on performance, blood parameters, carcass and meat quality characteristics of broiler chickens under continuous heat stress condition
I suggest the title to be as present above to flow.....
Hello, Dr., thank you for your comments. It is a good suggestion. There is one issue. Betaine is known as a methyl group donor that may change the course of the experiment and record new data. And if it plays a role in heat stress, we should look at the role of betaine in the production of glucose because the only way to get rid of stress is to produce glucose and maintain the body's sugar level so that the general line of defense of the body can be active and effective in the event of a decrease in the body's immunity. On the other hand, betaine may be able to act in the timely use of fat and conversion to sugar and by reducing the sugar level caused by active stress, it prevents the breakdown of protein and the reduction of muscle volume and the excretion of useful nitrogen in the body through uric acid. Separate studies of the two substances should be conducted and their combined effects compared to each of them. Finally, the status of the antioxidant glutathione peroxidase and the depth of small intestinal cryptococcal inflammation were also examined to see what level of betaine should be used so that coccidiosis does not occur. Thank you.
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