Sprayed Corn Peel

Sprayed corn husk is made by spraying a soaking solution of corn onto the corn husk, so it is called sprayed corn husk. It contains a portion of hydrolyzed monosaccharides and has a higher utilization rate than corn husk. It is a by-product of producing starch and germ after humidification of corn, and then spraying the high protein and energy corn slurry on it greatly increases the protein, energy, and amino acid content. This product has a yellow appearance.

With the continuous expansion of the industrial use of corn, there is a trend of decreasing and continuously increasing prices of corn used for feed. In order to not increase the cost of raising cows, provide a certain profit margin for cattle breeders, and reduce the contradiction between industrial corn and livestock feed, some corn by-products that can be used as feed are introduced in terms of nutrition.

1、 Industrial by-product feed that can be processed and produced from corn

Corn contains starch, fiber, protein, and fat (germ oil), making it a raw material for processing various industrial products.

Industrial products produced from corn

1. After soaking the alcohol corn seeds, the corn extract is precipitated, and the rest can be fermented into alcohol. Alcohol is an important chemical raw material and fuel. The by-products of alcohol production include:

1) DDG, also known as dry distiller's grains. It is a byproduct of corn fermented into alcohol, which is then distilled and precipitated into alcohol. The original sample generally contains 27.8% protein, the dry sample contains 29.7% protein, and the fat content ranges from 8% to 12%. It contains NEm1.85 Mcal/kg, NEg 1.25 Mcal/kg, and NEL2.19 Mcal/kg (or 2.9 NND/kg). The content of phosphorus and potassium is high, while the content of calcium is low. It is a high-quality protein supplement for feeding cows, with a higher rumen pass rate of protein than soybean meal, reaching 50% to 60%. The first daily feeding amount can reach 2.7-5.4kg. It has the effect of increasing milk production and preventing gastric acidosis.

2) DDGS is a product obtained by concentrating and drying some soluble substances and corn extract produced during the fermentation process, and then adding them to dry distiller's grains. Except for slightly lower crude protein content than DDG, other characteristics and dosage are the same as DDG.

3) DDS, also known as dried corn extract. Due to its mixing with DDG to produce DDGS, there are fewer such products.

2. Corn starch

After soaking corn, the extracted solution is called corn residue. After removing the germ from corn residue, it is crushed and water selected to produce starch. The remaining by-products can be used as feed, including the following.

1) Corn husk (CGF), also known as corn husk residue, or corn fiber feed, corn husk, etc. It is a corn gluten feed made by soaking, crushing, and selecting the sieved portion of corn during the production of starch, and dehydrating it. The yield is approximately 5%. Its composition is: water content 10.07%, crude protein 20.0% (20-22%), crude fat 5.7%, crude ash 1.0%, crude fiber 16.20% (6-16%), nitrogen free extract 57.45% (including starch over 40%), NEm2.05Mcal/kg, NEg1.41Mcal/kg, NE L 1.87Mcal/kg (or 2.5NND/kg). Among the proteins contained, the rumen passing protein is 30%. Neutral detergent fiber (NDF) 69%, acidic detergent fiber (ADF) 30%, calcium 0.10%, and phosphorus 0.30%.

Feed rate: 4.5-13.6kg/head per day. It can replace 50% to 80% of bran. There must be a transitional period of 2-3 days during feeding.

Corn starch can be used as raw material to produce glutamic acid, vitamin C, monosodium glutamate, acetic acid, acetone or rubber, L-lactic acid, etc.

2) Corn starch water and its drying product corn starch protein. Yellow starch is the clear liquid after precipitation of corn starch, which is made of corn starch protein after dehydration. Its production is approximately 4.5%. Yellow syrup water can be processed to produce glucose, fructose, maltose, oligosaccharide, whole sugar powder, maltodextrin, crystal fructose, etc. It can also be used to extract corn yellow pigment (isoprene), corn gliadin, and various amino acids (methionine accounts for about 40%, leucine 7-13%).

After dehydration and drying, the protein in the pulp contains more than 60% of crude protein, and its nutritional value can be comparable to that of fish meal and soybean meal. Its characteristics: ① good color and palatability; ② High digestion rate (such as amino acid digestion rate reaching 95%); ③ High energy content (1.7-2.5 Mcal/kg) ④ has a milk increasing effect.

3) Corn gluten powder, which is the washing solution used for starch washing or corn syrup used for fructose production. The yield is 0.5%, containing over 60% crude protein, and it is a protein feed with high effective energy value. The amino acid utilization rate of its single product is almost equal to that of soybean meal.

3. Corn germ and germ cake (meal)

This is the product obtained after removing the embryo from corn. Its yield ranges from 6.2% to 6.5%, making it a raw material for extracting corn oil. The embryo contains 46% to 48% oil, and about 2.5-3.0kg of oil can be extracted for every 100kg of corn. Corn germ has a high energy content before being squeezed, and can be used as an energy and protein supplement for cows during peak lactation, with a daily dosage controlled at 2 Within 5kg. Corn germ cake (meal) is obtained by extracting oil from corn germ. Its yield is 100kg of corn, with 3kg of oil obtained and approximately 3.2kg of corn germ cake (meal) obtained. Germ meal contains 22.6% crude protein (ranging from 18% to 23%), 1.9% fat, 24% starch, 9.5% crude fiber, 3.8% ash, 10% moisture, 2.1 Mcal/kg net lactation energy, 0.06% calcium, and 0.56% phosphorus. It is a protein feed for feeding cows. The dosage can account for 10% of the dry matter in the diet.

2、 Feed for by-products obtained from corn flour (dry) - corn bran

Corn is dried and ground in a flour processing plant. After sieving out the flour, the remaining portion on the sieve is generally called corn bran, which can be used as feed for cows. It is composed of starch from corn bran, embryo, and kernel. Its crude protein content is 9.1%, fat content is 6% (dry), milk net energy is 1.95 Mcal/kg, calcium content is 0.04%, phosphorus content is 0.18%, and crude cellulose content is 10.9%. Contains NDF 69%, ADF 30%, and rumen passing protein 30%. It belongs to a transitional type of feed between energy feed and protein feed. The daily feeding amount can reach 4.5-13.6kg, replacing 50% to 80% of bran.

3、 Several types of protein feed processed from corn industrial by-products.

1. Corn composite protein feed (non fermented product), also known as corn bran feed. It is prepared from corn husk (accounting for 40% to 60%), corn protein powder (15% to 25%), and corn impregnation solution (dry) (25% to 40%). The indicated protein content is 10% to 20%, and the digestion rate is 85%. It is a product that lies between energy feed and protein feed.

2. Corn protein feed

This is a composite protein feed produced by mixing the by-products of corn starch - corn protein powder, corn yellow syrup, corn fiber, crushed corn, etc. - through high-temperature pressing, defatting, and then inoculating multiple acid resistant bacteria for liquid/solid fermentation. The obtained product is then subjected to low-temperature hydrolysis, expansion, and drying before production.

Product specifications:

1) Moisture<11%

2) Crude protein 20%~35%

3) Crude fat<4%

4) Coarse ash content ＜ 5%

5) Crude cellulose 10%

6) Various amino acid contents: glutamic acid 6.331%, arginine 2.456%, methionine 1.211%, tryptophan 0.543%, phenylalanine 2.12%, and lysine 1.091%.

7) Product color: Yellow granular, with a slight fermentation odor.

8) Characteristics: Rich in nutrients, possessing the nutritional characteristics of various miscellaneous grains, and rich in various amino acids.

3. Corn spray protein

Also known as corn bran. It is a by-product produced by humidifying corn to produce starch and germ, with the main component being corn husk. Spray corn yellow syrup with high protein and energy content to greatly increase its energy, protein, and amino acids content. After drying, it becomes corn spray protein. Its characteristics: ① the color is yellow; ② Good palatability, animals like to eat; ③ The digestion rate is above 90%, with an energy content of 1.7-2.5 Mcal/kg.