JPH036778B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a method for improving the egg-laying performance of egg-laying hens in the early stages of egg-laying. (Conventional technology) Conventional feed for laying hens has a calcium content of 2.8~
3.5%, crude protein content of about 15-18%, crude fat content of about 3-5%, ME of about 2700-2900 Kcal/Kg, and such feed was constantly fed even in the early stages of spawning. On the other hand, the present inventors found that the calcium content was 3.7 to 5.
%, crude protein content 19-25%, crude fat content 5-20
%, ME3000-4000Kcal/Kg, and by feeding this feed concentratedly between noon and lights out, we can increase the strength of eggshells and reduce the rate of egg rupture. We discovered that it is possible to maintain a high egg production rate (Japanese Patent Application Laid-open No. 1983-
113854). (Problems to be solved by the invention) Improving the egg-laying performance of egg-laying hens is extremely important, especially for poultry farmers whose purpose is to collect eggs.
Improvement was always desired. (Means for Solving the Problems) As a result of various studies to develop a means to improve egg-laying performance, the present inventors found that the previously developed concentrated feed caused an increase in egg production and an increase in body weight. By intensively feeding young chickens in the early stages of egg-laying, a number of benefits can be obtained, including a faster rate of increase in egg-laying rate after egg-laying starts and an overall increase in egg-laying rate, including during peak periods. This discovery led to the completion of the present invention. That is, in the present invention, the calcium content is 3.7~
5%, crude protein content 17.5-25%, crude fat content 5-20%, and ME 3000-
The present invention relates to a method for raising egg-laying hens, characterized in that feed containing 4000 Kcal/Kg is constantly fed from the day of first production until the egg production reaches its peak. The feed used in the method of the present invention contains protein, an energy source, a calcium source, a phosphorus source, a vitamin source, 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. However, since the feed used in the method of the present invention is concentrated, it generally has a low fat content. is often added. 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. This feed is concentrated and has a unique 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. The concentration level is 100g or less, for example, compared to the conventional feed intake of 120g per day.
100g, 80g, or 70g will help you get the amount of nutrients you need. The feed composed in this way has a calcium content of about 3.7 to 5% and a crude protein content of about 3.7 to 5%.
The crude fat content is about 5 to 20%, and the ME is about 3000 to 4000 Kcal/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. The method of the present invention is characterized in that such feed is constantly fed to layer hens from the age of their first production until their egg production reaches its peak. The payment method may be the same as the conventional method. (Effect) Young chickens that have just started laying eggs have particularly high nutritional requirements because increases in egg production rate and egg weight coincide with increases in body weight. The present invention was made based on the discovery that concentrated feed is particularly effective for chickens at this age. With conventional feeds, for example, the egg production rate decreases due to lack of feed intake in the summer, fatigue due to lack of weight during the period when egg production increases, etc., but concentrated feeds compensate for these problems and maintain good egg production results. (Example) 130-day-old Shaver chickens were housed in groups of 2 in 8-inch cages, and raised by restrictive feeding using body weight as an index until 161 days old. At 162 days of age, 536 chickens were divided into 8 sections with 67 birds per section, and 4 sections were fed concentrated feed and the remaining 4 sections were fed conventional feed (products of Itochu Feed Co., Ltd.). The composition of the feed used is as follows.

[Table] The feed feeding method is 210 in the case of concentrated feed.
The dog should be fed ad libitum until the 211th day of age, and after the 211th day of age, the
Appropriate feeding was carried out according to the method disclosed in Publication No. 59-113854, that is, limited feeding in terms of quantity. On the other hand, in the case of conventional feed, it was fed ad libitum throughout the period. The results obtained are shown in Fig. 1, which shows the change in egg laying rate, and Fig. 2, which shows the change in daily egg quantity. In the figure, black circles indicate the case where concentrated feed was used, and white circles indicate the case where conventional feed was used. Other feeding results are shown in the table below.

【table】

[Table] Furthermore, even after changing from concentrated feed to restricted feeding, ME
Considering the intake amount, a state close to ad libitum feeding was maintained. (Effects of the invention) By feeding egg-laying hens according to the method of the present invention,
It is possible to increase the spawning rate and daily egg amount in the early stage of spawning. In addition, spawning can start faster and the rate of increase in spawning rate can be slowed down.
Weight gain is also good, and the amount of food consumed is small, so there is almost no loss of nutritional components even in the summer. Similar results were obtained for regular egg-laying hens as well as for forced molting hens.

[Brief explanation of the drawing]

Both figures compare the results of rearing using the method of the present invention and the results of rearing using the conventional method. Figure 1 shows the transition in the egg-laying rate, and Figure 2 shows the transition in the daily egg amount. There is.

Claims (1)

[Claims] 1 Calcium content 3.7-5%, crude protein content
17.5 to 25%, crude fat content of 5 to 20%, and ME of 3000 to 4000 Kcal/Kg should be fed ad libitum from the day of first laying until the egg production reaches its peak. Characteristic method of raising egg-laying hens.