Discuss the nutritional characteristics of calcium and phosphorus in laying poultry? （10 points）
Discuss the nutritional characteristics of calcium and phosphorus in laying poultry? （10 points）
发布时间：2025-05-28 16:19:43
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答案：【计分规则】: Laying poultry has a particularly high need for calcium. Calcium in eggs comes from feed and body tissues, but poultry has limited capacity to store calcium in the body due to its small bone mass and thin bone wall. The calcium requirement of laying poultry is very high, generally 4-5 times that of non-laying poultry. The calcium requirement depends on many factors: （2 points）（1）Egg production rate. The higher the egg production rate, the more calcium is required; （1 point）（2）Body size. The larger the body size, the more maintenance needs and the more feed consumption; （1 point）（3）The temperature of the poultry house. Outside of a moderate environment, the higher the temperature, the less the chicken intake, and the calcium content in the diet should increase accordingly; （2 points）（4）The ME concentration of the diet. The higher the ME concentration, the less the poultry will consume the feed, and the dietary calcium content should be higher; （1 point）（5）The age of poultry. Laying hens over 40 weeks old, need more dietary calcium; （1 point）（6）For poultry breeds, heavy-duty egg-laying poultry should consume less calcium than light-duty egg-laying poultry due to their high feed intake. （2 points）
相关试题
- 1.Discuss the nutritional characteristics of calcium and phosphorus in laying poultry? （10 points）
- 2.Briefly describe the main biological functions of calcium and phosphorus？（10 points）
- 3.How to improve the nutritional value of feed protein? （10 points）
- 4.How to improve the nutritional value of feed protein? （10 points）
- 5.8.The disorder of calcium and phosphorus metabolism often appears in chronic renal failure ( )
- 6.The main role of microorganisms in the phosphorus cycle is to convert inorganic phosphorus into organic
- 7.Which team gets the first 10 points?
- 8.Which team gets the first 10 points?
- 9.poultry
- 10.nutritional
