First, the nutritional value of corn stalks
Corn is used as feed-based grain, meridian and feed, and corn stalk is also an important production resource for industrial and agricultural production. As a resource, corn stalks are rich in nutrients and available chemical ingredients that can be used as feedstock for livestock feed. For a long time, corn stalks have been one of the main raw materials for livestock.
The test results show that corn stalk contains more than 30% carbohydrate, 2% to 4% protein and 0.5% to 1% fat, which can be silaged or directly fed. In the case of herbivores, the net weight gain of 2 kg of corn stalks is equivalent to 1 kg of corn kernels, especially after silage, yellow storage, ammoniation and saccharification, which can improve the utilization rate, and the benefits will be more considerable. According to research and analysis, the digestive energy contained in corn stover is 2 235.8kJ/kg, and it is rich in nutrients, and the total energy is equivalent to that of pasture.
Second, feed processing technology
1, silage processing technology
The green corn stalks are chopped to a length of 1 cm to 2 cm, and the water content is 67% to 75%. The storage is stored in a crucible, a cylinder, a tower, a pool and a plastic bag.
2, micro- processing technology
The corn stalks are cut short, the length is 5cm~8cm for raising cattle, and 3cm~5cm for raising sheep. The pigs need to be crushed. The container can be made of cement or earthworm like silage or ammoniation. The bottom and the surrounding are covered with a plastic film. Small batches can be used for cylinders or plastic bags, vats, etc. The water content of straw is controlled at 60%~70%, and microbial active strains are added to the straw.
3, yellow storage processing technology
The corn mash is chopped to 2cm ~ 4cm, put into the tank, add appropriate amount of warm water for 2 days.
4, ammoniation processing technology
First cut the straw into 2cm ~ 3cm long, the straw water content is adjusted to about 30%, according to 100kg straw with 5kg ~ 6kg urea or 10kg ~ 15kg ammonium bicarbonate, mixed with 25kg ~ 30kg water to mix evenly, prepare urea or ammonium carbonate aqueous solution Or add 15kg to 15kg of 15% ammonia water per 100kg of roughage. The mixture is layered, and the aminating agent is sprayed layer by layer. Finally, it is sealed and sealed at 25 ° C ~ 30 ° C for 7 days to ammonia, and the ammonia gas is volatilized and fed.
5, alkalization processing technology
The alkalization treatment mainly includes sodium hydroxide treatment, liquid nitrogen treatment, urea treatment, and lime treatment. Take lime, which is widely sourced and low in price, as an example. Add 1kg of quicklime to 100L of water, stir it continuously, and then take the supernatant. Stir well in the cylinder according to the ratio of solution to feed 1:3 and then compact it slightly. In summer, the temperature is high, and it usually takes only 30 hours to feed. In winter, it usually takes 80 hours.
6, acid storage processing technology
Spray an acidic substance on the storage material, or mix it with the right amount of phosphoric acid into the green fodder for storage, then add a little mirabilite,
7, briquetting processing technology
The straw is pressed into a high-density cake by a feed briquetting machine, and the compression can reach 1:15~1:5. The processed corn stalk becomes a block feed with a cross section of 30 mm×30 mm and a length of 20 mm to 100 mm, and the density is up to centimeters 0.6kg~0.8kg
8, grass powder processing technology
Any corn stalk that is not moldy and has a water content of not more than 15% can be used as pulverized raw materials. The straw pulverizer is pulverized during the production. The grass powder should not be too fine, generally 10 mm to 20 mm long and 1 mm to 3 mm wide. Counterattack.
9, puffing processing technology
The mechanism is to use the screw extrusion method to feed the corn stalk into the extruder, the screw spiral pushes the material to form the axial flow, and the material is strongly squeezed and stirred due to the mechanical friction between the spiral and the material, the material and the barrel and the material. , cutting, so that the material is refined and homogenized.
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