2. Raw materials: corn stover, straw, sorghum straw, oat straw, wheat straw. The water content of the straw is preferably 30%-40%.
3. Construction of ammoniation tank: Common ammoniation tanks include cement pools, plastic bags, water tanks, etc. The size of the cement pool is 2 meters long × 1.5 meters wide × 1.5 meters deep, with a medium interval. It can be used in three types: underground, semi-underground and above ground. The underground ammoniated tank should be built about 5 cm above the ground to prevent flooding. The plastic bag is made of non-toxic polyethylene plastic film of 0.1-0.2 mm, which can be made into a specification of 2 meters long and 1 meter wide. The plastic film requires uniform thickness and no trachoma.
4. Urea dosage: Urea 3-4 kg per 100 kg of straw (dry matter).
5. Nitriding operation: The ammoniated raw material is chopped into 2-3 cm long. According to the weight of the straw, weigh the amount of urea, that is, 100 kg of straw (dry matter) with 3-4 kg of urea, and dissolve the urea in 30-40 kg of water. The chopped straw is filled well on the same day. For easy compaction, layered filling is used. Each layer is packed with 20-30 cm. The water is sprayed onto the straw with a watering can, sprayed and stirred, layer by layer. Spray on the ground, press it layer by layer, avoid the dry layer, until the top of the pool, the top is made into a skull shape. When closed, the airtightness shall prevail. When the raw material is nearly full, the plastic film shall be inserted into the plastic film 30 cm deep along the wall, and the remaining part shall be cross-wrapped at the top, and a whole film shall be added on the top, and finally coated with the mud. The plastic bag should be nitrided, and the plastic bag should not be too large. After the straw and the urea aqueous solution are evenly stirred, the bag is placed in a bag and compacted. Whether it is cement pool, plastic bags, water tank ammoniated straw, it must be no damage, airtight, no water leakage.
6. Nitriding time: The length of time depends on the outside temperature. The temperature is high, the time is short, the temperature is low, and the time is long. The temperature is between 17 and 25 ° C and the ammoniation time is 4 weeks.
7. Feeding of ammoniated feed: The ammoniated feed is brown or dark blue, with ammonia smell when opened, and the smell is fragrant and soft when released. Take out the ammoniated material and let it dry for a day or two to feed. After the ammoniated material is taken out, the mouth of the tank should be sealed. Usually taken out today, feeding tomorrow. Feeding ammoniated materials should be less to more, and gradually improve their palatability. It can be used to reduce the amount of feed, or mix with grass. After the animals are adapted, the dosage is 20% of the cow's diet, and the beef cattle diet. 70%. Young animals or dams should not be fed ammonia in the later stages of pregnancy.
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