How to distinguish the quality of feed? How to distinguish poor quality from good and bad feed?

The quality of compound feed directly affects the production performance of broiler ducks and laying ducks. High-quality compound feed can ensure the normal growth of meat ducks and the normal egg production of laying ducks, which is the key to achieving economic benefits of breeding. Therefore, it is very important to choose a good feed, which is directly related to whether duck breeding can achieve ideal economic benefits.

The following issues should be considered to identify the quality of duck feed:

First, broiler duck and laying duck breeding enterprises should not use unlabeled feed products. Feed production enterprises should strictly implement the national feed labeling standards (GB10648-1999) and feed hygiene standards (GB 13078-2001). Duck farmers should check the label identification of the purchased feed products according to the production performance characteristics and nutritional requirements of their own broiler duck and laying duck breeds, and determine whether the nutritional quality of the feed products can meet the nutritional requirements of duck breeds.

The feed manufacturer should ensure that the main nutrient content of the product is consistent with the content indicated on the label.

Second, after opening the feed package, the appearance quality of the feed should be carefully observed, and it is required that there is no clumping and mildew, no peculiar smell, no moisture, good fluidity, and the fragrance of pure feed.

Third, carefully check whether the color of the feed is normal. The color of a normal feed is a fresh, pale yellow, which is significantly different from the yellow color produced by the addition of pigments to the feed. The content of corn and soybean meal in the feed is high, the feed color is yellow, and the quality is generally good.

If the color of compound feed and concentrated feed is found to be black and dark, it indicates that a large amount of low-quality protein feed is used in the production process, such as rapeseed meal, flax meal, blood meal, etc. The more low-quality miscellaneous meal used in compound feed, the darker the color, the worse the quality of the feed, the greater the feed intake of the duck, and the lower the conversion efficiency of the feed.

Fourth, heavier feed, high content of stone powder, shell powder, etc., the quality is generally poor.

Fifth, the growth rate of broiler ducks and laying ducks after ingesting low-quality feed decreases, and the egg-laying performance declines rapidly, while feed intake may increase.

The simple way to distinguish is like we separate foods, which smell and smell of chemicals, which are all bad feed.

In fact, it is necessary to distinguish the quality of feed from the selection of raw materials and the rationality of the formula, and even from the efficiency of the bait to determine the quality of the feed.

There are 6 ways to identify the quality of feed:

Look: First of all, look at whether the feed has a product quality certificate. The second is to see if there is a feed label. The feed label is at the sealing of the packaging bag, and its standard is determined by the State Bureau of Quality and Technical Supervision.

Formulate a release. Manufacturers must be attached to the feed product label, no label of feed, according to the relevant provisions can not operate, let alone buy. Third, look at the expiration date.

The shelf life is one of the contents indicated on the feed label, and the compound feed that exceeds the shelf life and does not indicate the shelf life should not be purchased. Fourth, look at the color of the raw materials. According to the color of the raw materials, we can roughly judge whether the feed is stable, but the color is not the only criterion to determine the quality of the feed.

Whether it is uniform, whether there is caking and mildew.

Smell: Various flavoring agents are commonly used in feed to adjust the palatability of animals for attracting, so do not judge the amount of a certain raw material according to the smell. Put aside the smell of the fragrance agent and smell if there are any other odors, such as moldy odor and grease odor.

Distiller's grains, ammonia (urea.

and other non-protein nitrogen formations) and other odors. A good product can smell its characteristic fragrance.

Taste: high-quality products (mostly compound feed) are sweet and delicious, not throat-throating, not bitter, no peculiar smell.

Feeding: Good feed has good palatability, sometimes it doesn't even need to transition, and it is eaten directly after feeding. Otherwise, most do not eat or even refuse to eat, except when they are sick.

Bowel movement: After eating, the high-quality feed does not have diarrhea, it is strip-shaped, the color is dark yellow and slightly black, the surface is shiny, and the landing is tower-shaped. If it is spherical or too dry, it means that the fiber content or drug content in the feed is too high.

If diarrhea (except for the transition period and disease phenomenon) indicates that there is a problem with the raw materials in the feed, do not continue to feed. However, some feeds are not loose after eating, and they can be continued to be fed when they do not affect their growth.

Long: Good feed growth is obvious after half a month of feeding, or compared with other feeds, the daily weight gain wins.

First, the basic method of feed identification: smell, touch, sight, check smell: different feed raw materials contain different odors, mostly rich or fragrant.

Anything that contains nausea, pungent, or even a little sour and smelly is probably mixed with a lot of bad raw materials. Touch: Organisms have bioelectricity, that is, static electricity, and the human body is also the same, so rub your hands or insert the feed to stir, and then pull away the shaking, if there is a substance that is difficult to shake off, it is generally adulterated seriously.

Vision: The colors are not the same. Different feed raw materials have different colors, once there are different colors and different gloss types of feed types in the same raw materials, it means adulteration; The particles are not neat.

Look at whether there are relatively neat small particles or ultra-fine particles in the smaller raw materials, and there are relatively large quantities. If there is, destroy it and compare it with the raw materials, and you can know the truth at a glance. Check:

Different raw materials have different tastes, carefully check, there is a difference between Ganqing ink and constant oblique, and then such as stone powder and other alkaline substances, you can know it at a check.

1. Soybean meal Most traders are willing to mix the low rice husk, rice bran, bran flakes, and finely ground yellow * cornmeal into small particles, mixed with pigments and feed, and even directly made of yellow * comprehensive, and then stirred in soybean meal, which will directly reduce the crude protein content of soybean meal to below 30%. Identification: Counterfeit soybean meal will reduce the rich aroma of soybean meal, and the taste will not be so pure.

The color of soybean meal is relatively light before heating, and after heating, it presents a deeper color, and the color and luster of soybean meal that does not participate in it changes significantly: or crush it, real soybean meal can not be rubbed into a small powder, if it is rubbed into a fine powder, it is obviously adulterated. The acid and alkali are different, or they are more seriously alkaline, and they can be identified by dropping iodine.

It is blue-black in color, that is, mixed with other substances. Take a small part and soak it in water for about two hours, if it is obviously layered, it is adulterated.

The quality of the feed should be judged from the qualification of the feed manufacturer, as well as a comprehensive evaluation of the feed to see if the feed is? After use. One of these chickens, ducks and geese grows. Changes in temperament.

1. Hope. Open the feed bag to see if the particles of the feed are uniform, and the difference between each grain of feed will not be too big for the feed of Gaohu chain source quality; Looking at the color of the feed, each manufacturer has differences according to the different colors of the formula, but the overall color of the feed is the same regardless of which formula.

The color of the feed, the bulk raw materials that make up the fish feed are fishmeal and soybean meal.

Cotton meal, rapeseed meal, flour and bran.

Among these conventional pants raw materials, fishmeal is black and gray, rapeseed meal is black, and other raw materials are mainly yellow, white and other light colors. If the fish sample is black and smells bitter, it is undoubtedly a low-cost feed with a large proportion of rapeseed meal. Because the first raw material is that the fish meal is larger than soybean meal, larger than cotton meal, larger than rapeseed meal, and greater than bran, there is no shrimp feed to make the feed black with fishmeal, let alone fish feed.

2. Smell. Grab a handful of feed and put it in front of your nose to smell it, the high-quality feed has a faint fishy smell of fishmeal, which still exists long after opening the bag; Inferior feed has a pungent fishy smell, which is stronger when the bag is opened, and the taste will become lighter after opening the bag for a period of time.

3. Bubble. Take a glass of water and throw a small amount of feed in the water, the high-quality feed will not disperse after entering the water, the whole is intact and there will be no crumbs, and after a few minutes, the feed feels soft by hand, and gently rubs and cracks without granularity. Inferior feed will fall off after entering the water, or directly scattered, and there will be a granular feeling when rubbing the feed.

It is normal for the extruded floating feed to sink a small amount after entering the water; There will be some oil splashes on the surface of the feed processed by the post-spraying process.

1. First of all, look at whether the feed has a product quality certificate; The second is to see if there is a feed label. Third, look at the expiration date. Fourth, look at the color of the raw materials. See whether the color is consistent and uniform, whether the granularity is uniform, and whether there is caking and mildew. 2. Smell.

Smell for other odors, such as moldy odors, grease odors, distiller's grains odors, ammonia odors (non-protein nitrogen such as urea) and other odors. A good product can smell its characteristic fragrance. 3. Taste.

High-quality products (mostly compound feed) are sweet and delicious, no throat trumpeting, no bitterness, no peculiar smell. 4. Hey.

Good feed has good palatability, sometimes it doesn't even need to be transitioned, and it is eaten directly after feeding. Otherwise, most do not eat or even refuse to eat, except when they are sick. 5. Convenience.

After eating, the high-quality feed does not have diarrhea, it is strip-shaped, the color is dark yellow and slightly black, the surface is shiny, and the ground is tower-shaped.

6. Long (key indicators).

Good feed grows significantly after half a month of feeding, or the daily weight gain wins compared with other feeds. For example, the weight in the first week is 70g, and good feed can grow to 75g-80g; The skeleton of the chick in the first week is 36mm, and a good feed can grow to 67-38mm; The uniformity of good feed can reach more than 85%.

Many pig farmers believe that the blacker the pig manure, the higher the digestion and absorption rate of the feed and the better the quality of the feed; The more yellow the manure, the lower the digestion and absorption rate of the feed, and the poor quality of the feed. In fact, this view is unscientific. In fact, the measure of feed digestion and absorption is not the color of the manure, but the conversion rate of the feed (feed-to-meat ratio).

From a formulational point of view, high copper can make the stool black. Although high copper has a certain growth promotion effect on pigs, the long-term addition of high copper additives will lead to the pollution of the environment caused by the residual copper element in pig manure, and the residual copper element in pork will cause harm to human health. Therefore, the black or not black color of the manure does not indicate the quality of the feed.

1. Look at the color.

The main raw materials of professional feed production enterprises are generally: fishmeal, soybean meal, cotton meal and other protein raw materials. Therefore, the appearance color of the product has the attribute of its raw material composition, which is generally dark yellow-brown or brown.

Some fishermen think that the lighter the color of the bait, the higher the content of soybean meal, but in fact, some companies add citric acid pigment to their products, not because the soybean meal content is high, which is not beneficial to fish. Some fishermen think that the darker the color of the bait, the better, and some production enterprises take the method of increasing the granulation temperature to meet the consumption psychology of fishermen. However, if the granulation temperature is too high, various nutritional factors in the feed will be decomposed and lost, resulting in insufficient nutrition in the feed.

2. Smell the smell.

The fish feed produced by professional enterprises generally has the fragrance of soybean meal and the fishy smell of fishmeal. Some companies add antibiotic drugs (such as allicin) to their products, so the feed has a drug-like smell. In order to illustrate the large content of fishmeal in their products, some manufacturers add flavoring agents such as fishy treasure and fish flavor to confuse the real with the fake.

Such products generally have a strong fish flavor, such as soaking in water for a period of time, the fishy smell disappears or fades immediately.

3. Test water resistance.

Some fishermen believe that a long water tolerance reduces bait waste. In fact, the common fish such as green, grass, bighead carp, crucian carp, carp and other fish in our north have no stomach and need to be fed frequently.

The water resistance of the feed is generally in 3-6 minutes.

Fourth, look at the specifications.

Professional production enterprises generally launch a series of products that adapt to the growth characteristics according to the characteristics of different growth periods of fish, and carry out effective product tracking services. For example, pellet feed, the product of the same specification is uniform and consistent, the surface is shiny, and the section incision is smooth. The inferior feed has a rough surface and a single specification.

First, the section is uneven. For dry pellet feed bait, the ratio of length to particle size can not be out of balance, and the length of the pellet is generally 1 5 2 5 times the particle size. The imbalance will seriously affect the palatability of the fish to the bait, resulting in a large amount of feed waste.

In addition, the finer the grain size of the fish, the better, and the finer the particle size of the feed raw materials, the lower the feed coefficient, and the higher the utilization rate.

Bran is also a kind of feed, to provide you with bran, first of all, to determine the bran with the drawing, and then to understand the quality of the bran, the quality of the bran moisture, the integrity of the bran sheet, whether there are impurities in the bran, refer to Hao Lao Nong's bran to give you the answer, I hope to help you.