JPH11111A - Feed for fish breeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a feed for fish breeding capable of keeping formability irrespective of method for adding oil, and high in upper limit of oil absorptivity, by making the feed include a dried extraction residue from a process of extracting starch from potatos or the like. SOLUTION: This feed is obtained by including preferably 2 to 15 wt.% of dried extraction residue from a process of extracting starch from potato, sweet potato, tapioca or the like. The feed can be in the form of solid or powder. Method for adding the extraction residue to the feed is not limited. For example, the residue can be added to the feed, while it is produced from fish meal as the main ingredient, soybean oil residue, gluten meal, flour, vitamins, minerals and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a solid feed and a powder feed for fish farming.

[0002]

2. Description of the Related Art Hamachi, amberjack, trevally, tuna,
When red sea bream and salmon trout are cultivated, fish containing a large amount of oils and fats such as sardines are eaten. However, as the number of raw fish such as sardines decreases, farming with artificial feed is inevitable. Therefore, it is essential to make the artificial feed contain a large amount of fats and oils, but it is not easy to make the artificial feed contain fats and oils. Currently, methods of adding fats and oils such as fish oil to solid feed for fish farming are roughly classified into an internal addition method in which the oil is added to the powder before molding or added at the molding stage, and an external addition method in which the oil is adsorbed to the pellets after molding. ing.

[0003] The external addition method has the advantage of adding fats and oils after molding to a solid feed, which does not affect the formability of powder, but has the disadvantage of increasing equipment costs for adding fats and oils. In the case of powder feed, since it is mixed with live food such as sardines and water and formed, it is difficult to add the powdered feed to highly water-soluble pellets. Therefore, actually, the feed for fish farming employs an internal addition method in which the feed is added to the powder in advance or added at the molding stage.

[0004] In any feed form, when fats and oils are added to the powder at or before the molding stage, the binding properties of the powder are significantly reduced, the pellet hardness is reduced, and the cut surface is roughened. Is observed. This is because the elution of a water-soluble binder such as starch or protein or CMC (sodium carboxymethylcellulose), sodium polyacrylate, or sodium alginate is hindered, and the adhesiveness of the powder is reduced.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a feed for fish farming, which maintains the formability and has a high oil absorption limit irrespective of the method of adding fats and oils.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted research on producing a feed with a high oil absorption limit while maintaining the moldability regardless of the method of adding fats and oils. By doing so, we found that we achieved the above objective, and completed this research.

[0007] The present invention provides (1) a feed for fish farming, characterized by containing a dried product of extraction residue generated when starch is extracted from a potato starch raw material, and (2) a potato made of sweet potato or potato. Or (3) the feed for fish farming according to (1), wherein the feed is solid or powder, and (4) the feed for starch scum. (1) The feed for fish farming according to (1), wherein the amount of addition is 2 to 15% by weight, and (5) the amount of starch scum is 5 to 10% by weight. A feed for fish farming as described in the above.

[0008] That is, the present invention relates to a feed for fish farming, characterized by containing a dried product of the extraction residue (hereinafter referred to as starch scum) generated when starch is extracted from a potato starch material. 2 to 1% by weight in the feed
The content was 5%. The preferred content is 5 to
10%. If the content exceeds 15%,
If the nutritional balance is broken and less than 2%, the above-mentioned limit is shown because the oil absorption performance of starch scum cannot be sufficiently exhibited.

Hereinafter, the present invention will be described in detail. Starch scum is a dried product of fibrous residue generated when starch is extracted from sweet potatoes, potatoes such as potatoes, tapioca, and other potatoes serving as starch raw materials. The starch scum used in the present invention may be derived from sweet potato or from the above potatoes. The method for producing starch scum is as follows, taking sweet potato starch as an example.

[0010]

[0011] Polymers that are chemically synthesized are known as highly oil-absorbing substances. However, as feed raw materials, safety has not been confirmed, and they are impractical due to high unit prices. However, it is not suitable as a feed material for fish farming. However, as a natural substance and a highly oil-absorbing substance, what was present in rice bran oil cake and above could not be known at all.

The present inventors have conducted research on adding a large amount of fats and oils to fish feed and maintaining moldability and oil absorbency.
By incorporating starch scum into the feed in an amount equivalent to half of the amount of added fats and oils, an improvement in formability that was completely unknown by the prior art was found.

Conventionally, starch scum has been mostly discarded in Kagoshima district to the extent that it becomes part of a rough feed for cattle, and effective utilization of starch scum has been desired. In the present invention, the feed containing the starch scum may be a hard pellet feed obtained by a pellet machine treatment, an EP feed processed by an extruder, an EX feed processed by an expander, or a powdered moist compound feed. In the present invention, it is preferable that the amount of the starch scum is approximately equal to half the amount of the added fat or oil.

[0014] The starch scum can be added to the feed at any step, for example, when the main ingredient is fish meal and soybean oil lees, gluten meal, flour, vitamins and minerals are blended as raw materials. Can be. The fat or oil can be added to the feed after it is adsorbed on starch scum beforehand, or may be added to the feed containing the starch scum. In addition, it was found from the present research that even starch scum is not suitable for the present invention in raw materials other than potatoes, for example, corn gluten feed which is a residue obtained by extracting oil, starch and protein from corn. (The oil absorption capacity of the corn gluten feed was 79.3%.)

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The oil-absorbing ability of starch scum with five kinds of raw materials such as fish meal, soybean oil cake, gluten meal, wheat flour and rice bran oil cake, which are generally used as feed materials for fish farming, was compared.
The oil-absorbing ability referred to here means that 30 g of each sample was weighed and stirred while gradually dropping purified sardine oil with an aluminum ball, and the maximum oil absorption was defined as the end point when fluidity was observed on the surface of the sample. The amount is a value obtained by weight%.

[0016]

[Table 1] Comparison of oil absorption capacity of raw materials for fish feed

As shown in Table 1, starch scum has almost twice the oil absorption capacity of rice bran lees, which has the highest oil absorption capacity among general raw materials, and is specifically high as a raw material derived from natural products. It was found to have oil absorption ability. Next, the maximum oil absorption of six types of test feeds molded into three types of hard pellets having a diameter of 6 mm, EP and EX at the mixing ratios shown in Table 2 was measured. At the same time, the performance of the pellets was evaluated by panelists.

[0018]

[Table 2] Compounding ratio of test feed

The evaluation method was as follows: pellets of a constant weight were immersed in refined sardine oil for 2 minutes, and after removing excess oil, the weight was measured to determine the weight gain, ie, the oil absorption. Regarding the workmanship, the control area was marked with ○, and if it was more than that, ◎,
In the case of less than that, the evaluation result for each panel was represented by ◎, 、, and × as x. The work quality refers to the state of cracks and defects on the surface of the pellet and the smoothness of the cut surface.

[0020]

[Table 3] Oil absorption of test feed

Although there was a difference in the maximum amount of oil absorbed by each of the production methods, in any of the production methods, the two sections containing the starch scum exhibited an excellent oil absorption rate than the one section containing the rice bran cake, and the molding was excellent. There was something comparable in terms of gender. Next, a growth comparison test was performed on rainbow trout using the EP processed test feeds 1 and 2 and the results shown in Table 4 were obtained.

[0022]

[Table 4]

From the test results shown in Table 4, the epoch-making result that feed efficiency increased by 4.5% in feed fed with starch scum compared to feed fed without starch scum is shown. Obtained.

[0024]

According to the present invention, a feed for fish farming which contains a high level of fats and oils and has excellent moldability can be produced.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuya Nishiyama 2-51-6-307, Nagata-Kita, Minami-ku, Yokohama-shi, Kanagawa (72) Inventor Kazunori Sako 3506-8, Yoshino-cho, Kagoshima-shi, Kagoshima (72) Inventor Takayuki Aramaki 15-3, Meiwa 3-chome, Kagoshima City, Kagoshima Prefecture (72) Inventor Katsunori Kuroki 1-52-8, Arata, Kagoshima City, Kagoshima Prefecture (72) Inventor Hiromi Nishi Hiromi Nishi 4-chome, 10-10 Meiwa, Kagoshima City, Kagoshima Prefecture No. 141 (72) Inventor, Kazuo Kitakami 599, Kamizun-cho, Izumi, Kagoshima Prefecture

Claims (5)

[Claims] 1. A feed for fish farming, comprising a dried extraction residue generated when starch is extracted from a potato starch raw material. 2. The feed for fish farming according to claim 1, wherein the potato is sweet potato, potato or tapioca. 3. The feed for fish farming according to claim 1, wherein the feed is solid or powder. 4. The feed for fish farming according to claim 1, wherein the amount of added starch scum is 2 to 15% by weight. 5. The feed for fish farming according to claim 1, wherein the amount of added starch scum is 5 to 10% by weight.