Fish Feed Production From Distribution Points

1, reasonable design Feed Formula Formula designed to get young before



Cultivation Fish Class type, growth stage, in order to determine the dietary protein, energy and other nutrient levels; it is necessary to meet the needs of fish growth on the protein, but also to the proportion of moderate energy and protein. High and low energy and protein ratio is not conducive to the growth of fishes. Investment account nutritional formula must be considered when the relationship between water and bulk density, it is necessary to ensure adequate intake of fish to nutrition, but also enable it to produce satiety; fish as a main energy source of protein, fat and carbohydrate on utilization of low, so the demand for fish protein than livestock



Birds ; General protein feed prices are higher than the proportion of energy feed and crude protein feed ratio decreased, but this will virtually increase the cost of feed; fish growth in different stages of the demand for a variety of different nutrients , for example, the protein diet for young carp 43% -41% content, 37% -42% stocks, as 28% -32% for the fish.



2, the choice of feed ingredients



With quality and cheap raw materials to be used



, stable supply, transportation convenient principle. Under conditions permitting the types of raw materials as possible, so that it can feed the balance of essential amino acids as far as possible to maximize the fish meet the needs of various essential amino acids and must not use, degradation, and materials. Moldy materials contain a large number of pathogens and toxins, such as moldy corn containing toxic aflatoxin. The feed can easily cause fish disease after feeding; Cottonseed meal, and rapeseed meal and other raw materials are cheap, protein content is higher, but because they contain gossypol, respectively, and glucose glucosinolates and other anti-nutritional factor, too multi-use will affect the fish's growth, and therefore limit the amount of not more than 10%. Many farmers prefer to use cheap diesel and meatloaf, but such a large number of indigenous species of animals mixed with fur, grinding and granulation work affecting the smooth progress of Chicago, after the fish do not digest food; diesel oil and cutlets in contain fat is saturated, and some as too long storage time has begun rancidity, fish, and the use of low saturated fat, excessive fat intake can lead to rancidity of fish suffering from alcoholic liver disease, so this class materials, consideration should pay attention to the moisture content of raw materials, feed moisture content of dry southern region is generally 12% -13% moisture can decrease the nutritional value of feed may also lead to moldy feed to reduce feed storage time.



3, Process control Rural production process from the general distribution of feed including crushing, mixing, granulating, the local conditions prior to the granulation also quenched. And animal feed grinding can increase the contact area of digestive enzymes to improve the matter, nitrogen and energy absorption and reduce feed efficiency. Granularity is too rough and too small is bad, the general fish feed ingredients should be crushed to all through the 40 mesh sieve, 60 mesh on the matter is not more than 20%. The best carp species feed grinding degree to 1.77mm, carp fingerlings feed grinding degree should be over 50-60 mesh (0.30-0.25mm).



Mixed with the feed to ensure the quality and effectiveness of the key areas to improve feed. Rearing practices that feed the various components in mixed uneven if it will significantly affect the growth of fish, severe, death. This is because the uneven mix of all kinds to make the same batch of feed nutrients are unevenly distributed and fail to get the effect of formulation, some additives such as heavy metals and other local high concentration will cause the fish poisoning. Available from the following three aspects to improve the mixing quality.



appropriate loading. Charging too much or too little will affect the mixing quality, batch-type mixer full of coefficients should be 0.6-0.8, continuous mixer full of coefficient control requirements below 0.5.



mixing time on the subject. Mixing time is too short not to be mixed, but cause long separation, the same effect on mixing quality. Determination of mixing time depends on the mixer's mixing speed, usually about 6 minutes.



sequence of operations. Large proportion of the components is generally plus or most of the first part into the machine and then place a small amount of material above and trace components; particle size of the material first increases, after the small particle size increases; proportion of small materials first increases, after more than a significant increase.



Conditioning grain before the feed pressure of blowing steam into the feed and steam mixing process, under heat to feed the starch gelatinization, can improve the digestibility; conditioning feed after forming. Quenched and quenched and the key is to control the steam, requires the use of the saturated steam, usually determined by the composition of materials quenched temperature, fish feed because of high crude protein content, feed temperature must reach above 85 .



To feed made of particles of various nutrients can be fixed in the particles from animal picky eaters. Fish feed made of particles can also reduce waste, reduce water pollution, reduce morbidity. Particle size of feed fish should be determined by the width of mouth cleft, feed particle size should be less than I split the 1 / 2: grass species, such as length and diameter of the corresponding feed :4.0-5 .0 cm, 0.8- 1.0mm; 5.0-6.0cm ,1.2-1 .5 mm; 6.0-7.0cm ,1.5-2 .0 mm; 7.0-8.0cm ,2.0-2 .5 mm.