How to improve the stability of aquatic feed in water

Categories:行业动态
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Origin:
Time of issue:2010-05-22
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(Summary description)Aquatic feed stability refers to the feed in the water soak for a certain period of time, holding ingredients are not dissolved and do not lose the performance. Generally in a certain period of time i

How to improve the stability of aquatic feed in water

Categories:行业动态
Author:
Origin:
Time of issue:2010-05-22
Views:0

Information

Aquatic feed stability refers to the feed in the water soak for a certain period of time, holding ingredients are not dissolved and do not lose the performance. Generally in a certain period of time in the water loss of the amount of feed and feed the percentage of the ratio of said, but also with the feed in the water does not collapse the longest time that. The loss of feed in the soaking of waste can cause waste of feed, water pollution, digestion and absorption barriers and feed coefficient. This article discusses how to improve the stability of feed in water.

First, the choice of raw materials to be reasonable

Aquatic feed and livestock and poultry feed is the biggest difference is that the breeding object is in the food, so feed nutrition and then high, if the feed is stable in the water, the quality of the feed is greatly reduced. Feed formula used in the rich and varied materials, which there is a reasonable choice of the problem, in addition to the angle from the support, the primary consideration is the stability of raw materials in the water. According to the road, the stability of water used in raw materials from strong to weak are: flour, seed meal, wheat, fish meal, rapeseed meal, soybean meal, silkworm pupa, wheat bran, corn flour, corn, rice bran. Of course, the same kind of raw materials, due to different sources of different raw materials, the final product of its water resistance is also poor. In addition, the freshness of raw materials, protein raw materials and species is also an important factor affecting the quality of stars. General high quality raw materials Adhesive ability, the mineral elements, suitable for low water stability of cheap feed; chemical synthesis of polymer adhesives with strong adhesion, can be used for the production of shrimp and special fish feed ; Coastal areas using fresh brown algae, fresh fish and shrimp pulp, etc., is also more economical and effective.

Second, starch, crude fiber and moisture content and ratio should be reasonable

Starch in high temperature, high humidity conditions, easy to gelatinization, bonding, is the impact of fish feed stability of one of the important raw materials. In the production with the right amount of flour instead of the traditional corn flour and other raw materials, can receive good results. Due to the poor viscosity of coarse fibers and the hardness and forming rate of the particles, the crude fiber content in the fish feed should be controlled at 3% ~ 5%, which can improve the water resistance of the feed. The moisture in the raw material not only affects the quality of the crushed material The effect of granulation is generally controlled by 12% to 13% of the raw material before the granulation.

Third, select the appropriate adhesive

At present, the use of the market there are many types of adhesives, but different adhesives, the use of different results. Select the adhesive should pay attention to: ① consider the feeding of fish and food water stability requirements; ② consider the nature of the adhesive, the amount and cost; ③ consider the mutual aid between the adhesive and feed effect, To see whether it will destroy the nutrients; ④ consider the nutritional value of adhesives and the growth and survival of fish and so on. Practice has proved that agricultural and sideline products adhesive viscosity, easy to prepare, has been widely used in aquatic feed; attapulgite soil, bentonite adhesion is good and contains a certain amount of prepared materials for hydrothermal treatment. Therefore, the control of the speed of the feed, choose a good tempering time, temperature, pressure and moisture is essential, especially the temperature cooling regulation, cooling that is to reduce the temperature and humidity after granulation. Cooling the feed increased hardness, can effectively prevent the entry of water, and water can reduce the stability of the pellet feed in water stability. Usually the aquatic feed just discharged from the cooler temperature is 6 ~ 9 ℃ higher than the room temperature, the water after cooling is 12% ~ 12.5%. Production should be based on the characteristics of materials, particles and the type of cooler to choose the appropriate cooling time and air volume. In addition, the good feed mill can use the extruder to produce fish feed to improve its water stability.

Fourth, processing technology and technology to be reasonable and advanced

Processing process to master the crushing of the particle size is a very critical step, crushing the size of the composition of the feed composition of the surface area, particle size is relatively large surface area, absorb steam fast, is conducive to quenching and tempering, good particle adhesion, high hardness, water stability Strong, such as shrimp feed raw materials require all through the 60 mesh standard sieve. At the same time in order to avoid the poor flow of raw materials after the poor, in the ingredients warehouse knot arch and dust, can be used after the first batch of wood after the processing technology. The optimum crushing size of the feed refers to the geometric mean particle size of the feed object that has the greatest utilization for the feed and does not affect the animal's health and economy. For fish food, because the fish grow in the water medium environment, the digestive tract differentiation is simple and short, digestive enzyme due to low temperature activity is not high, these special reasons determine its digestion easy to digest the bait. The size of the crushed grain of the feed has a great correlation with the digestibility of the bait, and the grain size of the bait is small, and the contact area with the digestive juice is large and the digestibility can be improved. And now the feed mill to use more steam for quenching and tempering, that is, directly into the steam produced by the raw materials, good water resistance, especially protein feed, with high natural protein production of raw materials, high quality particles. It was found that the animal protein raw material had better granulation effect than the plant protein raw material, and the stability of the water was better with the hydrolysis of the new protein source instead of 2/3 fish meal.

Five, summary

To sum up, aquatic feed is an essential source of food for aquaculture. With the differentiation of breeding patterns in the future, the breeding varieties are becoming more and more diversified, especially the development of high density, intensive and super intensive culture system, and the requirements of fish feed quality are more stringent, and the stability of fish feed in water Is one of the main measures to improve the quality of feed. This is a practical significance for adapting to the needs of fish farming and is an urgent problem to be solved.

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