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Plastic bag and silage method
According to the experiment, 40kg heavy shelf pigs were fed with 0.4kg fine material and 7.5kg fresh sweet potato vines per day, with a monthly weight gain of 13.5kg. At present, after harvesting sweet potatoes in rural areas, some of the potato vines are freshly fed to pigs, while others are mostly dried for winter storage. However, the nutritional value of dried potato vines is far less than that of fresh potato vines. Potato vines can maintain their freshness through silage, and contain nutrients that remain unchanged, which can achieve the feeding effect of fresh vines. Here's how to use plastic bags to dry the vines: 1. Plastic bag selection and production. The silage plastic bag is preferably made of a polyethylene plastic film. One end of the silage bag is heat-bonded, and care must not be taken to break the bag to prevent air leakage. 2. Plastic bag capacity. The double-layer polyethylene plastic film is made into bags, and the capacity of each plastic bag should be controlled to more than 500kg, preferably 300 to 400kg. 3. Water content of sweet potato vines. The water content of sweet potato vines is kept at about 70%, and the maximum is not more than 75%. 4. Sweet potato vine bags. The potato vines were cut into small pieces 1 cm long. When bagging, press it sideways and try to compact it. Fill the bag with a rope and place it in a suitable position in the room. The sweet potato vines are packed in bags and subjected to anaerobic lactic acid bacteria. The sugars in the potato vines are converted into lactic acid. After the silage, the potato vines are yellowish-green and have a rich acid and aroma. The texture is soft, and the palatability is good, which is easy for animals to digest. The quality of silage in plastic bags exceeds the pit storage. The use of polyethylene plastic bag silage sweet potato vine has the following advantages: 1. Economical. 0.5kg plastic film is only 2~3 yuan, can be used as two silage bags, and can total 500~700kg of silage sweet potato vines, which can solve the green material of 2~3 pigs in off-season. If the plastic bag is kept properly, it can be used for two years. 2. Feeding is easy and easy. 3. The quality of potato vines is good, and pigs love to eat. Silages in plastic bags are isolated from the air and are not exposed to dirt. They can prevent pollution and do not rot. They can not only maintain nutrients, but are also eaten by pigs. They also reduce the loss of pits and cellar silage by 20%. Wu Jian (Shuangjingyi District, Baijiaping Town, Ningyuan County, Hunan Province, Post Code: 425612)