1. Metabolic energy content is too high: many people think that the higher the energy in the feed, the more eggs lay. In some farms, the feed energy of laying hens is as high as 12.12 MJ/kg, and corn accounts for 70% of the total feed. From the anatomical chicken body, it was found that the excessive energy and the accumulation of ovarian fat seriously affected the egg production and egg weight, especially when the feed protein content was insufficient.
2. Excessive crude protein content: Some chicken breeders think that eggs contain high protein content, which is mainly composed of feed protein. Most of these farms are technicians with elementary cultural knowledge. When preparing feed, they use high protein feed, soybean meal, peanut meal and other meals and fish meal in large quantities, resulting in feed. Costs are rising and protein is wasted, while laying hens are poisoned by high feed protein content.
3. The ratio of calcium to phosphorus is obviously imbalanced: in many chicken farms, the calcium content is low at the peak of laying, reaching only 0.9%. This kind of farm is mainly based on the chicken nutrition standard, blindly compounded into laying hen feed. Under normal conditions, calcium and phosphorus should reach 3.5%-3.7% and 0.45% during laying period. Otherwise, the eggshells are easy to break or soft-shelled eggs are often produced, resulting in undesirable economic losses.
4. Blind addition of vitamins and trace elements: most of the technicians in this kind of farm have low level, only know some common sense of feeding. They know that these two kinds of substances are indispensable for the growth of laying hens, but often do not grasp the proportion of using them properly. Therefore, most of them are excessive, a few are insufficient, and more green fodder is used instead of vitamins. Biotin significantly affected the feed intake of chickens. The inadequate addition of vitamins and trace elements affects growth and egg laying performance. Blind addition of vitamins and trace elements often results in higher feed costs and the opposite.
5. A feed formula has been used to the end: different breeds and different growth stages of laying hens have different nutritional standards, which requires that the feed formula should be adjusted appropriately. Most of these small-scale chicken farms regard raising chickens as a sideline at the beginning. They do not attach great importance to the scientificity of feed formulation. Instead, they adopt the feed formulation of a larger chicken farm nearby and use it all the time, so that they can not get enough nutritional needs at a certain feeding stage, resulting in an undesirable economy. Losses.
6. When chickens are infected with diseases, improper medication is added to the feed: this is not uncommon, resulting in very bad consequences, such as laying eggs at 25 weeks of age is only about 5%. It was found that when the chickens were sick or died, they did not ask the veterinarian for treatment, but went to the drugstore to describe their illness and buy medicines. Due to inaccurate condition, inaccurate judgment, improper use of drugs or dosage, uneven mixing of drugs in feed, chickens eat more or less, resulting in poisoning or failure to achieve therapeutic effect, the survival of chickens growth and development is inhibited, production performance is extremely low.