JPH032502B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to feed for eel farming. [Prior Art] Unlike sea bream, sea bream, salmon, etc., eel has a unique feeding style, and therefore eel farming feed is in the form of paste bait. Eel also has a very strong palatability, and its paste bait is soft enough for eel to eat and shred with its mouth.
It must maintain smoothness and elasticity, and must have properties that do not disintegrate even during the eel's active feeding movements and even when underwater for long periods of time. Usually, around 20% by weight of α-starch is used as a binder. However, α-starch has the following drawbacks. In other words, if you knead it for a long time or leave it for a long time, it will deteriorate and its cohesive strength and elasticity will rapidly decrease, resulting in contamination due to the dispersion of feed into the water and a decrease in the eel's feeding efficiency. It has some drawbacks. Traditionally, white fish meal made from white fish has been mainly used as fish meal, but in recent years, brown fish meal made from sardines and other ingredients has started to attract attention due to its price and nutritional value. It is coming. However, compared to white meat meal, brown meat meal is
Although it has the above-mentioned advantages, it has poor viscoelasticity, which causes water pollution and a decrease in feed efficiency. Therefore, in addition to α-starch, active gluten, sodium polyacrylate, guar gum, CMC salt, etc. are used as binders, but all binders have their drawbacks and none are fully satisfactory. The reality is that it does not exist. Activated gluten exhibits strong viscosity when kneaded with water, but it takes a long time to knead to achieve that viscosity, and sodium polyacrylate
It gels in the presence of Ca salts and has good shape retention but insufficient water retention. Guar gum does not have sufficient shape retention properties, and since it is a natural product, it is prone to decay.
It has the disadvantage of causing significant water pollution. CMC
Salt has good water retention and can improve disintegration in water, but fundamentally it is difficult to obtain the elasticity of α-starch. Also, fish feed to which α-starch and polyvalent carboxylic acid are added has been disclosed (Japanese Patent Application Laid-Open No. 1983-1989-1).
130394), there are problems with caking and stickiness. [Problems to be Solved by the Invention] As a result of intensive studies to obtain a binder that satisfies the required performance of eel feed, the present inventors found that CMC salt, which has the least disadvantages, retains the conventional advantages. The present invention was achieved by discovering that it is possible to compensate for the drawbacks by using the same method. [Means for Solving the Problems] That is, the present invention provides a feed for eel farming characterized by using a CMC salt and a polyvalent carboxylic acid in combination. CMC salts include, for example, Na, K, and ammonium salts, with various degrees of etherification (hereinafter referred to as DS),
Viscosity can be used, but preferably DS0.5
~1.5, 1% viscosity should be less than 15000cps,
It is not particularly limited. The degree of etherification indicates how many carboxymethyl groups are substituted with ether bonds in one glucose unit of cellulose. Examples of polyhydric carboxylic acids include citric acid, malic acid, and tartaric acid.
It is not particularly limited. Addition of polyhydric carboxylic acid alone improves sludge, but increases stickiness and requires much effort in handling and cleaning up the kneading machine. If the amount of CMC salt or polyvalent organic acid added is small, there will be no effect, and if the amount of CMC salt added is too large, it will become hard and no cracks will occur. Also, if the amount of organic matter added is large, it will nod well, but it will become very sticky. Therefore, the addition rate of CMC salt is 0.1 to 5.0% by weight, preferably 0.5 to 2.0% by weight, and the addition rate of polyhydric carboxylic acid is 0.1 to 10% by weight, preferably 1.0 to 7.0% by weight, based on the feed. It is preferable that there be. In the present invention, any material that can be used as a raw material for eel feed can be added and used in combination. Examples of the present invention are shown below, but the present invention is not limited thereto. [Example] Example and Comparative Example Fish meal, α-starch, CMCNa, polyhydric carboxylic acid, vitamins and minerals, and feed yeast were mixed well in the proportions shown in Table 1, and 120 parts of water was added.
The mixture was kneaded in a kneading machine for 3 minutes to produce a paste, which was then subjected to a sensitivity test and a water disintegration test. The water disintegration test was conducted by taking 100g of the bait, rolling it up, and placing it in a beaker to which 700ml of water was added.

【table】

〔Effect of the invention〕

From the results shown in Table 2, it was found that by using CMC salt and polycarboxylic acid in combination, they compensated for each other's deficiencies, and an eel feed with very good physical properties could be obtained.

Claims (1)

[Claims] 1. A feed for eel farming characterized by using a carboxymethyl cellulose salt and a polyvalent carboxylic acid in combination. 2 Carboxymethyl cellulose salt is 0.1 to feed
~5.0% by weight, polyhydric carboxylic acid 0.1~10.0% of feed
% by weight of the eel farming feed according to claim 1.