â— There are many types of shrimp, and the same kind of shrimp also has different grades of products, and their quality requirements are very different. There is no uniform standard for judging quality.
â— Determine the quality of shrimp material, and ultimately depends on the breeding effect. However, the breeding effect depends not only on the quality of the feed, but also on the germplasm and health status of the shrimp, water quality, stocking density, and very important feeding and management.
â— It should be pointed out that the use of advanced extrusion machine squeezed shrimp material, due to the processing process, making the surface color black (after immersion in water, black will quickly retreat, become gray-brown), the smell is light, The food intake decreased, but the aquaculture effect was comparable to that of granules, and it had the advantages of killing all pathogens, good physical properties, and high digestibility.
There are many types of shrimp, and the same type of shrimp also has different grades of products, and their quality requirements are very different. There is no uniform standard for judging quality. For example: Japanese prawn material, Chinese prawn material, and giant prawn material require larger amounts of fishmeal and higher protein and fat content; Roche adult shrimp and shrimp paste can use more vegetal raw materials, and protein content is not required. Too high; shrimp in South America is somewhere in between.
Determine the quality of shrimp material, ultimately depends on the breeding effect. However, the breeding effect depends not only on the quality of the feed, but also on the germplasm and health status of the shrimp, water quality, stocking density, and very important feeding and management. The shrimp produced by the good quality shrimp has rapid growth, strong disease resistance, low feed coefficient, fresh and transparent shrimp, and full fleshy meat. For example: a good South American white prawn material, under normal circumstances, raising South American white prawn is about 80 days can develop commercial shrimp (specification 35 ~ 45 tail / jin) out of the pool sales, bait coefficient of 0.9 to 1.1.
How do you use shrimp to distinguish its quality?
First, look at the major nutritional indicators. Among them, the contents of crude protein, crude fat, lysine, methionine, arginine, available phosphorus (shrimp can absorb and digest phosphorus), crude fiber, and ash content are very important. Most of these indicators are marked on the label, generally credible, a small part is not marked, users can not send samples to detect. As for the very important variety of vitamins and trace elements, the content is not indicated. What needs to be pointed out here is that some users only look at the crude protein content and think that the high protein content is a good material. This is a misunderstanding. As with fish, the protein content of the shrimp is not as high as possible. Excessive protein and fat content will affect the growth of fish and shrimp. Using such materials for fish and shrimp will not only increase the cost of breeding, but also affect the growth of fish and shrimp.
Second, see the choice of raw materials. The nutrition index only reflects its quantity and does not reflect its quality, but quality is very important. For example, with 40 proteins, fishmeal protein and soybean protein are different. Soy protein and cottonseed meal and rapeseed meal protein are also different. The main raw materials used in shrimp feed should be fish meal, soybean meal, peanut meal, corn meal, corn protein meal, high-gluten flour, fish oil, and phospholipids. The name of the main raw material is generally indicated on the label, but there is no very important proportioning amount.
Third, the simple identification of quality. Talk about the points for your reference.
1, color. Good shrimp is light gray brown, uniform color, oily. However, the color is affected by the color of the raw materials, and there will be changes in depth, which cannot be regarded as a major quality factor.
2, smell. Good shrimp should have a clear smell of fishmeal, shrimp or salmon. When the seal is closed for a long time, it cannot smell a pungent odor, nor can it smell oxidized. Clear but not turbid, indicating that the use of fish meal is better, thick fishy fishy taste, indicating that the use of fish meal, fish oil more but poor quality.
3, appearance requirements. The surface of the shrimp material is smooth and smooth, with a smooth fracture surface, a uniform length, and uniform particles.
4, crush fineness. The shrimp was crushed with a glass bottle and the fineness of the crushed was observed. The good shrimp is finely crushed, without any significant large particles.
5, water resistance and softening time. The shrimp is soaked in water. After 2 to 3 hours, the shrimp material expands without scattering, does not sew, does not break, and does not bloom at both ends. After soaking in water for 30 to 40 minutes, it is fully softened and the kneading material is not hardened, and the kneaded shrimp does not spread.
6. Simple biological tests. Put the water-softened shrimp in places where there is ant activity and flies are easy to go. Good shrimp, ants and flies are going to eat. If the softened shrimp is placed on the ant's channel, the ants do not want to approach it and pass through it, so the shrimp is not very good.
7, lure. A small amount of shrimp was submerged in shrimp ponds using a small net made in the house. About half an hour later, a small net was put on the water surface to observe how much shrimp was left in the net. How much shrimp there was in the net was to determine its feeding habit. In general, good shrimp feeds are more attractive. However, it is not possible to determine the quality of the shrimp material only based on its feeding habit. Because some shrimp materials are not very good in terms of internal quality, they are much more attractive. The shrimp will like to eat, but the effect of breeding is not as good; some of the shrimp materials are of good quality but they do not have attractant substances or Adding less, although shrimp is not very delicious, the breeding effect is very good. What is certain is that, for good shrimp, shrimp will not have eating disorders, and they will be able to feed normally when they are accustomed to it.
It should be pointed out that the use of advanced extrusion machine squeezed shrimp material, due to processing technology reasons, making the surface color black (after immersion in water, black will quickly retreat, become grayish brown), light odor, lure The food habits were reduced, but the aquaculture effect was comparable to that of granule shrimps and shrimps, and it had the advantages of killing all pathogens, having good physical properties and high digestibility.
Fourth, select manufacturers and brand products. Shrimp is a high-grade feed and has higher requirements for formulas, raw materials, processing, and quality. The large-scale companies and brand-name manufacturers that are operating regularly have strong technical strength, strict formula management, relatively fine selection of raw materials, advanced production equipment, relatively standardized production process management and product quality management, and therefore, their product quality. More reliable and stable.
Of course, I do not exclude small factories and no-name products, such products may also have good quality shrimp. However, for the users, the brand products produced by Dachang are more reliable and reliable.
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