How to distinguish the quality of feed from the appearance

If you want to judge the quality of silage, you can judge the success of fermentation by smelling the sour aroma of green silage.

The use of Kangyuan Oasis such as gold silage starter culture to evaluate the quality of silage generally relies on the senses.

When opening the silage container, according to the color, smell, taste, texture, structure and other indicators of the silage, the quality of the silage is evaluated by the senses, this method is simple and fast.

1) Colour Good quality silage is very close to the original colour of the crop. If the crop is green before silage, it is best to remain green or yellow-green after silage. The temperature at which the raw material ferments in the silage is the main factor affecting the colour of the silage, and the lower the temperature, the closer the silage is to its original colour.

For grasses, the temperature is above 30 and the color turns dark yellow;

When the temperature is 45 60, the color is close to brown;

More than 60 , almost black due to caramelization of sugars.

In general, good quality silage is yellow-green or turquoise in color, medium-brown or dark green, and inferior is brown or black.

2) Smell. Good quality silage has a slight sour taste and fruity aroma. If there is a pungent sour taste, there is more acetic acid and the quality is inferior.

Those that are rotten and smelly are inferior and should not be fed to livestock. In short, those who are fragrant and pleasant to smell are superior, while those who are pungent are medium, and those who smell and smell bad are inferior.

3) Texture. The stems and leaves of the plant should be clearly identified, and the damage and sticky slippery state of the structure are signs of silage spoilage, and the greater the viscosity, the higher the degree of spoilage. Excellent silage, pressed very tightly in the cellar, but loose and soft when picked up, slightly moist, not sticky to the hand, stems, leaves and flowers remain in their original shape, easy to separate.

Medium silage stems and leaves partially remain in place, soft and slightly more watery. The inferior ones are clumped, rotten and sticky, and the original structure cannot be distinguished.

How to distinguish the quality of feed from the appearance is mainly observed and judged from the following points: 1. Color, the main components of feed are corn flour, soybean meal and various cake meals, and the color is required to be bright and there are no mildew particles; 2. Taste: no peculiar smell; 3. Uniformity:

All kinds of particles are mixed evenly; Consistent color; 4. The particle size and requirements are consistent.

You don't have to let the animals eat it.

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.

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.

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.

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, 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 map, 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.