JPH0325142B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for feeding concentrated feed for egg-laying hens that increases the strength of eggshells, reduces the egg-breaking rate, and does not reduce the egg-laying rate even in summer. One of the major issues currently facing egg farms is improving eggshell quality. Usually, egg-laying hens
After 400 days of age, the quality of eggshells deteriorates, and when the eggs reach around 500 days of age, the quality of eggshells becomes particularly poor. In addition, the quality of eggshells deteriorates due to high temperature stress even in summer. Usually, about 5 to 6% of eggs are damaged from the production site to the general consumption stage, and this often reaches 10% or more especially for eggs from chickens that are 400 days old or older. Therefore, various attempts have been made to improve eggshell quality. For example, many farms are adding calcium sources such as oyster shells to commercial feed, but this has not yet resulted in a reduction in the egg breaking rate. The present inventors focused on the fact that eggshells are formed at night, and considered a method of intensively ingesting calcium in the afternoon. As a natural premise, 1
Because the design is such that the required amount of nutrients can only be obtained by eating 120g or more per day, it is difficult to intensively ingest calcium in the afternoon. Therefore, after further investigation, we devised a concentrated feed that is thought to be ideal for chickens' calcium metabolism, and when we fed this feed intensively in the afternoon, chickens were able to secure the required amount of food intake and lay eggs. We have discovered that it is possible to significantly improve eggshell strength and egg breaking rate while maintaining the egg-breaking rate, and that various excellent advantages can be obtained, such as the egg-laying rate not decreasing even in summer.
We were able to complete the present invention. That is, the present invention has a calcium content of 3.7 to 5.
%, crude protein content 19-25%, crude fat content 5-20%, and ME 3000-4000kcal/
The present invention relates to a method for feeding layer hens feed, which is characterized in that 80% or more of the total amount of feed for layer hens is fed to the layer hens between noon and lights out, at least 80% of the total daily amount of the feed. The feed of the present invention contains protein, an energy source, a calcium source, a phosphorus source, vitamins, minerals, etc., like a normal feed. Protein sources include fish meal, soybean meal, rapeseed meal, feather meal, and meat bone meal.Amino acids such as DL-methionine, L-tryptophan, L-lysine, and L-threonine are used to compensate for amino acid imbalances. May be added. Energy sources include carbohydrates such as corn, milo, and wheat flour, and fats such as feed oil, soybean oil, powdered oil, etc. Since the feed of the present invention is a concentrated type, generally a large amount of fat is added. There are many. Examples of calcium sources include calcium carbonate. It goes without saying that it is necessary to contain other phosphorus sources, vitamins, minerals, etc. in the same way as known feeds. The feed used in the feeding method of the present invention is a concentrated type and has a characteristic composition. In other words, the ratio of protein, calcium source, phosphorus source, vitamins, minerals, etc. is increased according to the degree of concentration, and in exchange, a large amount of high-energy fat is added to ensure the required amount of energy with a small amount of energy source. .
Note that it is effective to use a slightly larger amount of calcium source than the content depending on the concentration ratio. As for the concentration level, the necessary amount of nutrients can be obtained with, for example, 100g, 80g, or 70g of feed, compared to the conventional feed intake of 120g per day. The feed composed in this way has a calcium content of about 3.7 to 5%, a crude protein content of about 19 to 25%, a crude fat content of about 5 to 20%, and an ME of 3000 to 4000 kcal/
It will be around Kg. There is no special feature in the manufacturing method of such a feed, and it is sufficient to mix a predetermined amount of each component determined by the feed design according to a conventional method. In the feeding method of the present invention, from noon to 8 p.m.
80% or more of the daily amount, in principle, the entire amount, should be fed between 2:00 and 3:00 p.m., preferably between 2:00 and 3:00 p.m.
This is because eggshells form from dusk to night, so having enough material Ca in the digestive tract at that time is very favorable for eggshell improvement. Therefore, feeding feed intensively in the afternoon is an effective feeding method that can strengthen eggshells that are suitable for egg-laying physiology. In the present invention, by restricting concentrated feed in this way, a large amount of calcium can be automatically fed in the afternoon when calcium accumulation is required, improving eggshell quality and strengthening eggshell strength. We were able to increase the egg rupture rate and significantly reduce the egg rupture rate. The effects of the present invention are not limited to this, but since large amounts of oil and fat are used, premixes such as vitamins and trace minerals in feed, and calcium sources such as calcium carbonate are difficult to separate, so chickens can distribute each component uniformly. It also reduces the amount of feed that is spilled. In the case of the feed of the present invention, since only a small amount of food is required, the required amount of nutritional components can be sufficiently consumed even in summer, and as a result, a decrease in egg production rate can be prevented. Because the feed is restricted, the chickens consume the feed intensively, resulting in improved digestibility and feed efficiency. Since the feed is concentrated, transportation costs can be reduced.
Also, the amount of excrement is reduced. Since the feeding method of the present invention has the above-mentioned effects, it has great merits for egg-laying poultry farms. Examples are shown below. Example 1 Three types of feed were prepared with the mixing ratios shown below.

【table】

[Table] 150 chickens, 400 days old, were divided into 3 groups of 50 birds each, and allowed to freely feed the above control (1) feed for 2 weeks as a preliminary test period. Some of the chickens in each group were replaced to determine the egg production rate, Adjustments were made so that the eggshell strength and egg breaking rate were the same in each group. Of the chickens divided into three sections, the first section was fed with type feed, and the second section was fed 100 g of type feed per bird between 2:00 pm and 3:00 pm. On the other hand, in District 3, as a control, 120g of control feed (1) was given per bird per day from 2:00 p.m.
I paid my salary between three o'clock. The results obtained are shown below.

【table】

【table】

[Table] There is a significant difference between a and b at the 5% level of risk.

[Table] As is clear from the above results, by feeding the feed of the present invention using a specific feeding method, eggshell strength was increased and the egg rupture rate was able to be significantly reduced. The egg-laying rate was also comparable to, or even slightly better than, the conventional feed, and there was almost no decrease in the egg-laying rate during the summer. Example 2 Two types of feeds were prepared with the mixing ratios shown below.

【table】

[Table] 22 chickens, 600 days old, were divided into 2 groups of 11 birds each, and fed the control (2) above for 2 weeks as a preliminary test period. Some of the chickens in each group were replaced, and the egg production rate was determined. and eggshell strength were adjusted to be the same. Of the chickens divided in this way, 90g of type feed per bird per day was fed to group 4 between 2:00 p.m. and 3 hours, and control feed (2) was fed to group 5 at 120g per bird per day. The animals were fed between 2:00 pm and 3:00 pm, and were kept in a controlled room at 20±2°C. The results obtained are shown below.

【table】

[Table] In addition, the average amount of feces was 104.5 g per bird per day in the case of the type feed, whereas it was 130.5 g in the case of the control (2) feed. Example 3 Using the type of feed in Example 1, 100 chickens aged 400 days were fed.
The birds were divided into 2 sections (6 sections and 7 sections) each containing 50 birds, and tested for 2 weeks. Of the two wards, 6th ward pays approximately 80% of the total daily salary between 4:00 p.m. and 8:00 p.m. in the 6th ward as indicated by the hatched line in Figure 1. Approximately 65% of the total daily salary is paid between 12:00 pm and 8:00 pm, using the method shown by the unshaded lines in Figure 1. The results are shown below.

【table】 [Brief explanation of the drawing]

Figure 1 is a graph showing the payment method.

Claims (1)

[Claims] 1 Calcium content 3.7-5%, crude protein content
19-25%, crude fat content 5-20%, and ME of 3,000-4,000 Kcal/Kg for over 80% of the total daily amount fed to laying hens between noon and 8 p.m. A method for feeding feed for layer-laying hens, characterized in that feed is fed to egg-laying hens.