Several Discussion Topics on Laying Hen Feed and Laying Hen Farming
Several Discussion Topics on Laying Hen Feed and Laying Hen Farming
The Livestock Forum Baijia Jiangtan lecture series on "Practical Laying Hen Farming Technology and Feed Formula Design" has officially begun. This is also an opportunity for me to exchange and learn, and I hope to receive the guidance, attention and support of all seniors and industry colleagues. I would like to express my thanks in advance. In order to make this section distinctive and better serve laying hen feed companies and farmers by solving their problems, I hereby propose several discussion topics: 1. Main factors affecting laying hen farming profitability and improvement measures; 2. Non-disease factors causing decreased laying rate in laying hens and improvement measures; 3. The true methionine requirement of high-yield laying hens and influencing factors; 4. Calcium metabolism, true requirement and feed calcium digestibility of high-yield laying hens; 5. Why is the moisture content of laying hen manure much higher than that of chicks and growing pullets? Main factors affecting the moisture content of laying hen manure and improvement measures.
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The stage is set, a great opportunity, I hope everyone will exchange more
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How do we discuss this, right here in this section?
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I hope everyone will share their valuable experience and insights. Let me first offer a modest contribution to get the discussion going. Why is the moisture content of laying hen manure much higher than that of chicks and growing pullets? -- Mainly because: 1. Laying hen feed contains high calcium, and the laying hen's need for calcium is uneven. At night when eggshells are being formed, a large amount of calcium is needed; the absorbed calcium is fully utilized and a portion of stored calcium is mobilized. During the day, only maintenance-level calcium is needed. After absorption, apart from a portion replenishing stored calcium, most of the calcium in the feed is excreted through the kidneys. Calcium has low solubility, so to excrete excess calcium, a large amount of water must be consumed to assist excretion. 2. The laying hen's need for protein is also uneven. In the morning when egg white is being formed, a large amount of protein is needed, while in the afternoon and at night only maintenance-level protein is needed. Thus, in the afternoon and at night, apart from a small portion of feed protein used to replenish body reserves, most is converted into energy metabolism, and the contained nitrogen is synthesized into uric acid and excreted through the kidneys. Similarly, uric acid also has very low solubility and also requires a large amount of water to assist excretion. 3. The laying hen's requirement for the electrolyte sodium ion is 25% higher than that for the chloride ion, while table salt, as a good source of sodium and chloride ions, contains 50% more chloride than sodium. Chloride in major feed ingredients is also about twice as high as sodium. Therefore, when table salt is used to supplement sodium ions and meet the sodium ion requirement, the chloride ion is already seriously in excess (often overlooked), and laying hens also need to increase water intake to excrete excess chloride ions. Improvement measures: 1. Feed a high-protein (18%) low-calcium (1.5% calcium) diet in the morning, and feed a low-protein (11%) high-calcium diet (4.5% calcium) in the afternoon and at night; 2. Incorporate electrolyte balance into feed formula design: add 0.2% table salt + 0.12% sodium bicarbonate to the laying hen diet.
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Hello Senior Brother Xie! Several farmers have reported that the peak laying rate cannot reach above 90%, and some eggs have poor coloring and appear whitish. Basic information: Breed: Hy-Line Brown (pink-shell laying hen breed) Age: about 170 days (24 weeks of age) Body weight: 3.2-3.5 jin Laying rate: 80-85% Feed intake: 100-105g per bird per day Calcium source supplement: oyster shell powder Major ingredients: corn 62, soybean meal 25, oyster shell powder 8, premix 5, supply sources are basically consistent. Please advise.
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Hello Brother Hu! Where are you working now? It has been a long time since we last contacted each other. You must be doing well? Let's keep in touch more in the future (13308411176). The phenomenon that the peak laying rate cannot reach above 90%, and some eggs have poor coloring and appear whitish -- if this flock has not experienced any epidemic before and their development is basically normal, then it can be said with certainty that the health care work for the growing pullets was not done well. Some laying hens' oviducts and ovaries have already been infected by intestinal pathogenic bacteria, which means that some hens' oviducts and ovaries are currently inflamed. Whitish eggshells are a manifestation of oviduct inflammation. If the ovaries are inflamed, follicles cannot develop and ovulate normally or lay eggs. Solutions: Treat the oviduct inflammation (methods have been described in detail in daily laying hen management); increase the amount of dihydropyridine added (total 150ppm) and the amount of betaine added (betaine hydrochloride total 0.2%). For those laying hens whose ovaries have already been infected, they will not be able to recover and lay eggs in the future (because the ovaries do not have this repair function). The only solution is to select these hens and cull them. (If some hens have not yet developed well, the culling work should be delayed somewhat.) Brother, you might as well give it a try, and remember to tell me the results.
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The overall usage environment is the same. The oyster shell powder issue is also something I have always been worried about. The main thing is that the probability of this phenomenon occurring is currently not high, and it should appear right at the start of laying, and at the same time it should be more obvious when temperatures are highest in July-August?
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A rare opportunity! Study carefully!
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Study Teacher Hu's lecture carefully! I hope to be your student.
--------------------------------------
Thank you for the teacher's guidance. I will study carefully and hope to become a good formulator, hehe
--------------------------------------
Good, a rare opportunity! Study carefully!
--------------------------------------
Study well, thank you to the original poster
--------------------------------------
The stage is set, a great opportunity, I hope everyone will exchange more
--------------------------------------
How do we discuss this, right here in this section?
--------------------------------------
I hope everyone will share their valuable experience and insights. Let me first offer a modest contribution to get the discussion going. Why is the moisture content of laying hen manure much higher than that of chicks and growing pullets? -- Mainly because: 1. Laying hen feed contains high calcium, and the laying hen's need for calcium is uneven. At night when eggshells are being formed, a large amount of calcium is needed; the absorbed calcium is fully utilized and a portion of stored calcium is mobilized. During the day, only maintenance-level calcium is needed. After absorption, apart from a portion replenishing stored calcium, most of the calcium in the feed is excreted through the kidneys. Calcium has low solubility, so to excrete excess calcium, a large amount of water must be consumed to assist excretion. 2. The laying hen's need for protein is also uneven. In the morning when egg white is being formed, a large amount of protein is needed, while in the afternoon and at night only maintenance-level protein is needed. Thus, in the afternoon and at night, apart from a small portion of feed protein used to replenish body reserves, most is converted into energy metabolism, and the contained nitrogen is synthesized into uric acid and excreted through the kidneys. Similarly, uric acid also has very low solubility and also requires a large amount of water to assist excretion. 3. The laying hen's requirement for the electrolyte sodium ion is 25% higher than that for the chloride ion, while table salt, as a good source of sodium and chloride ions, contains 50% more chloride than sodium. Chloride in major feed ingredients is also about twice as high as sodium. Therefore, when table salt is used to supplement sodium ions and meet the sodium ion requirement, the chloride ion is already seriously in excess (often overlooked), and laying hens also need to increase water intake to excrete excess chloride ions. Improvement measures: 1. Feed a high-protein (18%) low-calcium (1.5% calcium) diet in the morning, and feed a low-protein (11%) high-calcium diet (4.5% calcium) in the afternoon and at night; 2. Incorporate electrolyte balance into feed formula design: add 0.2% table salt + 0.12% sodium bicarbonate to the laying hen diet.
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Hello Senior Brother Xie! Several farmers have reported that the peak laying rate cannot reach above 90%, and some eggs have poor coloring and appear whitish. Basic information: Breed: Hy-Line Brown (pink-shell laying hen breed) Age: about 170 days (24 weeks of age) Body weight: 3.2-3.5 jin Laying rate: 80-85% Feed intake: 100-105g per bird per day Calcium source supplement: oyster shell powder Major ingredients: corn 62, soybean meal 25, oyster shell powder 8, premix 5, supply sources are basically consistent. Please advise.
--------------------------------------
Hello Brother Hu! Where are you working now? It has been a long time since we last contacted each other. You must be doing well? Let's keep in touch more in the future (13308411176). The phenomenon that the peak laying rate cannot reach above 90%, and some eggs have poor coloring and appear whitish -- if this flock has not experienced any epidemic before and their development is basically normal, then it can be said with certainty that the health care work for the growing pullets was not done well. Some laying hens' oviducts and ovaries have already been infected by intestinal pathogenic bacteria, which means that some hens' oviducts and ovaries are currently inflamed. Whitish eggshells are a manifestation of oviduct inflammation. If the ovaries are inflamed, follicles cannot develop and ovulate normally or lay eggs. Solutions: Treat the oviduct inflammation (methods have been described in detail in daily laying hen management); increase the amount of dihydropyridine added (total 150ppm) and the amount of betaine added (betaine hydrochloride total 0.2%). For those laying hens whose ovaries have already been infected, they will not be able to recover and lay eggs in the future (because the ovaries do not have this repair function). The only solution is to select these hens and cull them. (If some hens have not yet developed well, the culling work should be delayed somewhat.) Brother, you might as well give it a try, and remember to tell me the results.
--------------------------------------
The overall usage environment is the same. The oyster shell powder issue is also something I have always been worried about. The main thing is that the probability of this phenomenon occurring is currently not high, and it should appear right at the start of laying, and at the same time it should be more obvious when temperatures are highest in July-August?
--------------------------------------
A rare opportunity! Study carefully!
--------------------------------------
Study Teacher Hu's lecture carefully! I hope to be your student.
--------------------------------------
Thank you for the teacher's guidance. I will study carefully and hope to become a good formulator, hehe
--------------------------------------
Good, a rare opportunity! Study carefully!
--------------------------------------
Study well, thank you to the original poster