Two days ago, in Laihe Company, I met an old user in Xinxiang, who has raised laying hens for more than 20 years and more than 30,000 eggs, with rich experience. During the discussion, baking soda was mentioned, which is used in summer. Their experience is that after using baking soda, the feed intake of laying hens began to increase the next day and they kept using it.
I was scared and panicked.
They didn't mention that using baking soda in summer will double the water consumption of laying hens, because the increase in water consumption will lead to the lower body temperature of laying hens, the cooler animals, and the better food intake, but the water content of feces will double and diarrhea will be messy.
Isn't this the role of baking soda in resisting thermal stress?
On the contrary, in summer, severe breathing and carbon dioxide loss lead to respiratory alkalosis, which undoubtedly adds fuel to the fire by giving baking soda!
The correct way is to supplement acidifier and reliable probiotic products to animals in summer, improve the acid-base environment in animals, improve the intestinal environment and reduce the environmental temperature of animals.
Second, popular science baking soda
Baking soda is sodium bicarbonate, also known as acidic sodium carbonate, which is an acid salt with the chemical formula of NaHCO3. Properties: white powder or fine crystal, odorless, salty, soluble in water, but less soluble than sodium carbonate in water, slightly soluble in ethanol, and slightly alkaline in aqueous solution. It decomposes easily when heated. Slowly decompose in humid air.
Uses: mainly used as carbon dioxide generator in food, soft drinks and cold drinks, and also used in feed additives, medicine, chemistry, tanning, fire-fighting preparations, biological breeding, detergents, environmental desulfurization, sterilization and detoxification, bathing and health care industries.
Soda powder is an important regulator of aquaculture. It is necessary to introduce its function:
Baking soda, also known as weak alkalinity of sodium bicarbonate, has the following mechanism:
1. Neutralize gastric acid, dissolve mucus, reduce the viscosity of digestive juice, strengthen gastrointestinal tract contraction, and play the role of invigorating stomach, inhibiting acid and stimulating appetite.
2. Adding sodium bicarbonate to feed can supplement the decrease of carbonate in blood caused by heat wheezing of livestock and poultry, thus improving the calcium metabolism of the body.
3. For laying hens, adding sodium bicarbonate to feed can improve the fluidity of phosphorus in laying hens. In order to form.
Third, collect a lot of opinions:
The views supporting the landlord are as follows:
Nhwx: Doctor: This is a theoretical analysis of an article about baking soda in the forum two years ago. Is it reasonable?
Here, I believe everyone will have a question that needs to be explained: Since high temperature weather may cause respiratory alkalosis in pigs (especially when large pigs breathe too much carbon dioxide, respiratory alkalosis is more likely to occur), why should we use weak alkaline baking soda (sodium bicarbonate) to drink water or add it to feed? Moreover, in practice, adding baking soda powder in summer is proved to be very effective for raising chickens (laying hens can also increase the strength of eggshells) and pigs.
The answer is: respiratory alkalosis combined with metabolic acidosis is easy to occur under high-intensity heat stress.
① The PH value of animal blood is about 7.4 0.05, which is weakly alkaline. The stability of PH value in blood depends on the balance of HCO3- (alkaline) and H2CO3- (acidic) in the buffer liquid system. The ratio of H2CO3 to HCO3- in human blood (H2CO3/HCO3-) is 1∶20, thus maintaining the pH value of blood.
In the extremely hot season, the sweat glands of pigs and chickens are underdeveloped, and the metropolis discharges the accumulated heat in the body by increasing breathing. If asthma is caused by heat stress or pathological acceleration, too much H2CO3 will be discharged, which will lead to the development of alkaline blood and the signs of alkalosis. (It should be emphasized that this situation is extreme and rarely happens. On the contrary, high temperature is easy to cause metabolic acidosis. )
At the same time, animals have a set of effective measures to stabilize the PH value in blood. Unless there are extreme cases (such as kidney and lung diseases), it is generally not affected by some external additives. The mechanism of PH regulation in animal blood is through three systems: ① intracellular and extracellular buffering of body fluids (i.e. cell regulation system); ② The intensity of lung respiration determines the rate of CO2 excretion (i.e. lung regulation system); ③ The excretion or storage of HCO3- concentration by the kidney (that is, the renal regulatory system); The former is used to weaken the influence of pH change caused by excessive acid or alkali load or intake. The latter two maintain pH stability or make abnormal pH return to normal by excreting or retaining acid and alkali.
In the blood ratio (H2CO3/HCO3-), the amount of H2CO3 is mainly regulated by lung respiration (the faster the respiration is, the more it is excreted, and the weaker the respiration is, the more it increases), while the amount of HCO3- is mainly regulated by the excretion or storage of HCO3- by the kidney. Generally speaking, the PH value in blood is very stable. Unless there are extreme circumstances.
② The PH value of saturated solution of baking soda is 8. In other words, baking soda actually has little effect on regulating the pH in the blood, because there is little difference between 8 and 7. 4. The addition of baking soda is only about 0.5% of feed or 0.25% of drinking water.
So baking soda can't directly affect the PH value in blood, but baking soda can directly adjust the PH value of body fluids, which is the first checkpoint mentioned above, that is, baking soda can affect the cell regulation system.
The PH value of body fluids (mainly cytoplasm and intercellular fluid) in animals generally fluctuates between 6.8 and 7.5. The acid-base regulation function of body fluids is much lower than that of blood, and it is unstable relative to blood, but it forms the first protective barrier to maintain the PH balance of blood, but the best body fluid PH value should be aligned with blood, that is, weak alkalinity is the best, metabolism is vigorous in summer, physical exertion is accelerated, and the change of body fluid pH value is just the opposite to that of blood. In summer, the PH value tends to decrease. For example, under the condition of insufficient energy or oxygen supply, cells metabolize lactic acid to increase the acidity of body fluids, that is, metabolic acid increases (severe acidosis). Baking soda is first absorbed by body fluids, which can stabilize the PH value of body fluids, thus ensuring the normal metabolism of cells and relieving heat stress.
At the same time, sodium bicarbonate neutralizes with lactic acid in gastric acid or body fluids to produce sodium lactate and H2CO3, which directly enters the blood and participates in the balance mechanism of H2CO3/HCO3- in the blood. The result of increasing H2CO3 is only to reduce the PH value in blood, thus alleviating blood respiratory alkalosis. That is to say, baking soda seems to be a weakly alkaline substance, but the result of its metabolism is to lower the blood PH and relieve respiratory alkalosis. Add Chu Liuxiang Veterinary WeChat 158904736 18 to help you diagnose chicken diseases for free, and share more breeding knowledge!
The produced sodium lactate can balance electrolytes and correct metabolic humoral acidosis. Especially under heat stress, the loss of sodium and potassium in animals is serious and can be introduced through baking soda.
That is to say, when pigs are under heat stress and their breathing is accelerated, the excretion of H2CO3 is accelerated. Although there is a trend of alkalosis in blood, adding baking soda can not directly affect the PH value in blood, but it can buffer the PH value in body fluids, ensure the normal metabolism of cells, and provide additional sources of H2CO3 for blood, thus indirectly alleviating respiratory alkalosis.
In other words, respiratory alkalosis actually only happens in extreme cases (besides, technicians usually use ephedrine or aminophylline to relieve asthma in the case of shortness of breath), so it generally does not happen. On the contrary, when there is high temperature heat stress, metabolic acidosis or non-poisoning often occurs locally, resulting in excessive metabolic acid, which makes the PH value of local animal body fluids easy to drop, and the result of using baking soda will also neutralize excessive metabolic acid locally.
Even if the respiratory frequency is too high and CO2 exhaled too much (respiratory alkalosis is imminent), the effective addition is ammonium chloride, or acidulant, health care liquid, etc. , not baking soda. For example, the PH value of lactic acid or citric acid solution is 2.5 ~ 3.5, which is 4.0 different from that of blood PH7.4, so they can relieve respiratory alkalosis more effectively.
In addition, the multi-dimensional thermal stress resistance effect of electrolysis is also good. It aggregates the regulating effects of vitamins E, C and electrolytes, but it is not as direct as ammonium chloride and baking soda, and the price is more expensive.
Wandering in the Mountain: Don't argue with me about this, because metaphysics has no end.
At the beginning, I did my doctoral thesis and measured the arterial blood PH value of more than N high-temperature broilers in summer. They are all panting and alkaline. The higher the temperature, the more alkaline they are-I've never seen any acidity.
Imagination sometimes kills chickens-especially those little hens that lay eggs. How lovely they are!
When you have acidosis, you usually die within half an hour. Therefore, in actual production, there are not many opportunities to see acidosis. I bet if you use baking soda, there must be an acidulant in it.
To prevent heat stress in pigs, it is best to add vitamin C, sodium selenite, vitamin E, butyl phosphate (invented by Bayer, energy metabolism promoter), live bacteria, enzymes, vitamin B6 and so on.
Pzh502: The early stage of heat stress is alkalosis and the later stage is acidosis. Adding baking soda across the board is definitely not feasible, especially in pigs. Support the doctor! And adding baking soda for a long time will also break the balance of intestinal flora.
Learning endlessly 20 13: support the doctor's opinion, it must be respiratory alkalosis, which was said in the physiology class.
On the one hand, the deepening and acceleration of respiration leads to hyperventilation of the lungs and excessive discharge of CO2, resulting in respiratory alkalosis; The content of CO2 in cerebrospinal fluid is insufficient, and the decrease of [H+] leads to the inhibition of respiratory center and weakened respiration.
Ⅱ. On the other hand, with the increase of intra-arterial pH, the oxygen dissociation curve shifts to the left (the affinity between oxygen and hemoglobin increases, but it is not released), resulting in tissue hypoxia.
respiratory acidosis
Respiratory acidosis refers to the weakening of alveolar ventilation function, which can not fully discharge the CO2 produced in the body, so that the blood PCO2 increases, causing hypercapnia. The common causes are general anesthesia, excessive sedative, cardiac arrest, pneumothorax, acute pulmonary edema, bronchospasm, laryngeal spasm and improper use of ventilator, which significantly affect breathing, make ventilation insufficient, and cause acute and temporary hypercapnia. Another reason is that some diseases can cause the continuous increase of PCO2, such as extensive fibrosis of lung tissue, severe emphysema and other chronic obstructive pulmonary diseases. These diseases have ventilation dysfunction or alveolar ventilation-blood flow mismatch, which can cause CO2 retention in the body and lead to hypercapnia.
respiratory alkalosis
Respiratory alkalosis refers to hyperventilation of alveoli, and excessive discharge of CO2 produced in the body, which leads to decreased blood PCO2 and hypocapnia. There are many reasons for hyperventilation, including hysteria, mental stress, fever, trauma, infection, central nervous system diseases, mild pulmonary edema, pulmonary embolism, hypoxemia, liver failure and.
Herdsmen: I'm from Shanxi, and Laoxier likes to be jealous. Vinegar is the baking soda used now. Vinegar can neutralize alkalosis, and baking soda can provide HCO3- to supplement the lost carbon dioxide. Just like providing a chicken with a cool soda in summer, the effect is really good!
Affectionate hello: Do you feel that baking soda is a legacy of popular science in the 1980s? I have never used baking soda anyway.
Dream flute in the valley: The value of the debate lies in making people understand the two sides of things more comprehensively, and everyone dares to disagree with the doctor's opinion. This spirit is worth learning and advocating. Borrow a sentence that doctors often reply-there is no end to learning, and only by continuous learning and exploration can we understand the essence of things more deeply and thoroughly.
Yudi6350 12: related to fish. Intense photosynthesis in summer leads to a large consumption of carbon dioxide, and the high PH value of water can reach more than 10. The solution is to increase the buffering effect of water.
Ren Hu: I agree with the doctor that baking soda has limited effect on balancing rumen PH and alleviating tumor acidosis in ruminants.
The increase of PH value is only the expression of the change of rumen microbial fermentation mode, and simply reducing PH value can not solve the problem.
It is important to adjust microbial composition, improve fermentation mode and strengthen the transformation from lactic acid to propionic acid. You can try to add better quality live yeast products.
Fypfm: According to the physiological and biochemical theory, after CO2 is excreted, the body is alkaline, and CO2 is still generated after OH reacts with HCO3-, that is, adding baking soda to feed or drinking water in summer will aggravate CO2 generation and asthma.
Therefore, it supports the doctor's point of view that acidifiers or substances that regulate gastrointestinal flora, such as microecological agents and probiotics, should be added to feed. Pure theory. I don't know if it's right.
Jianghu 2004: I also heard some friends say that they have long since stopped using baking soda. Under the conditions of high temperature or stress in summer, the body is alkaline. So I dare not add baking soda any more!
Disagree with the landlord's point of view as follows:
Sdhmzxl 168: The application of baking soda is explored in the long-term life practice of human beings, which is very helpful to human beings. Now the old steamed bread is very helpful for the digestion of the stomach, and later it was introduced into domestic poultry. After decades of use, the benefits are beyond doubt.
Learning is endless 20 13: the doctor is half right. Respiratory alkalosis is good. Because it is alkalosis, it breathes out too much co2, so it lacks co3 ions, so it needs to be supplemented with baking soda. So it is beneficial to use baking soda in practice. Do you all understand? The debate failed to find the essence. The problem of acid-base balance is only a symptom, and the essence is the lack of co3 carbonate ion in blood.
Mark: Baking soda is slightly alkaline and can supplement CO2. There is no doubt that it is metabolized in the body to produce acid. For salt, HCL is a strong acid and Na is a good buffer. The palatability and digestibility of big alkali old flour steamed bread are obvious to all. The discussion of this problem needs to be tested on physiological and biochemical indicators, and it will be better explained by combining production data. Based on the current production data and existing experiments,
Xun Liliu: Practice is the only criterion for testing truth! Pure theoretical analysis is misleading by factors that are easily overlooked. Baking soda is an electrolytic salt, which is the product of acid-base neutralization. The aqueous solution is alkaline, but does a proper amount of baking soda immediately change the pH value of body fluids? If not, it means that the effect of baking soda on the body is not as simple as that in water. To explain a problem, we need a lot of experimental data, backed by rigorous experimental design. In science, there is no right to speak without experiments. Every event has a degree and pros and cons, and our frontline practitioners should grasp and weigh the pros and cons according to their actual situation and actual use effect! The use of baking soda is not a year or two. If it doesn't work at all, it won't be needed today. It is also true that excessive use causes diarrhea, but reducing other sodium salts should also alleviate it. To overthrow the use of baking soda, there must be more convincing and real experimental data!
Yudi6350 12: I have been cooking two thousandths of baking soda in poultry feed in summer. I haven't encountered any problems in 3 or 4 years.
Adding VC and VE is very effective for laying hens to resist high temperature stress in summer. Especially VE can improve the quality of eggs in high temperature season.
Jxynwl: Doctor, your opinion is just the opposite. Accelerated breathing will increase the exhalation of carbon dioxide, but after continuous acceleration, severe breathing will make breathing fast and shallow, and carbon dioxide is not easy to exhale, thus causing acidosis. Baking soda can neutralize respiratory acidosis.
Ckq793 12: Dr. Wang said, "On the contrary, in summer, severe breathing and loss of carbon dioxide lead to respiratory alkalosis, so add baking soda to the fire!" It seems that Dr. Wang wants to see animal physiology again. You are wrong! "Respiratory alkalosis caused by carbon dioxide loss?" Are you kidding? Excessive loss of carbon dioxide in the blood should lead to respiratory acidosis, right? ! ! Baking soda is added to supplement the excessive loss of carbon dioxide!
In early years, baking soda was added to broiler feed in summer to supplement the loss of carbon dioxide, and then intensive laying hens began to use it.
Because birds have no sweat glands, they mainly rely on increasing breathing to expel heat in summer, and metabolic acidosis is caused by excessive loss of carbon dioxide. After adding baking soda, the lost carbon dioxide can be replenished.
However, adding baking soda to the feed will also increase the amount of drinking water and make the feces loose. That's because there are more sodium ions in the feed after adding baking soda. In order to avoid this situation, the usual practice is to reduce the amount of salt while adding baking soda.
That's what I did when I raised AA broilers in Jiangsu Agricultural Reclamation in the middle and late 1980s. Can effectively avoid high temperature death in summer.
Neutral point of view:
Yudi6350 12: Suddenly thought of an aquatic product problem:
When transferring water: We use quicklime, 1 for sterilization and disinfection, increase the bicarbonate in the water body, enhance the buffering capacity of the water body, and make the PH value of the water body change less (the water body has strong photosynthesis, releases hydrogen ions when the PH value is low, and combines hydrogen ions when the pH value is high, without photorespiration).
So is it a truth to use baking soda in poultry feed? Enhance the body's buffering ability?
zhi37 16:
It seems that there are still different views on baking soda. Baking soda replaces salt to reduce the addition of chloride ions. Better maintain the function of acid-base balance,
The glory of the king: I really learned this. I have raised the ingredients for laying hens for three years and have never used baking soda. I think increasing the cost. When adjusting nutrition, baking soda was ignored.
III: Conclusion
I believe that after reading the above discussion, you already have the answer in your heart. How did you do it in practice? Welcome to click on the original text to discuss and share!