Establishing a new model of environmental protection breeding in the suburbs of Beijing

Introduction: in Weiwang Kemu planting company, Changyang Town, Fangshan, Beijing suburb, there are only more than 30 mu of pig farms in the 500 mu of developed land, and the rest of the land is planted with green plants The nursery and forest surrounding the pig farm cut off the way of epidemic infection, absorbed pig manure, and created a "green home" for pigs, but also had considerable economic benefits The scientific combination of planting industry and breeding industry has become a new mode of environmental protection breeding in the suburbs of Beijing According to the monitoring report provided by Beijing Forestry University, a sow can provide about 20 commercial pigs every year, with an average of 75 liters of excreta per day The excreta of every 5 to 10 sows is equivalent to the amount of fertilizer required by a mu of nursery or fast-growing forest According to Zhang Liandi, vice manager of Weiwang company, according to this algorithm, the company listed 60000 commercial pigs last year, and the total amount of excretion is equivalent to the excretion of 3000 sows, so it needs to plant 300 to 600 mu of forest land Weiwang company adopts large-scale, small unit, high-density environmental protection feeding technology, taking 500 mu land as a unit, and strictly in accordance with the scientific proportion, to build pigsty planting forest In the completed unit, 60000 pigs were put on the market last year At the same time, more than 400 mu of forest was built According to the company's plan, by 2004, when the pig farm is officially completed, 350000 commercial pigs will be put on the market Around the pig farm, a breeding base of 2500 Mu triploid Populus tomentosa and a fast-growing forest of 4500 mu triploid Populus tomentosa will also be formed In Weiwang breeding base, green plants and pigs become an integral part of the ecological environment The base determines the planting area of the economic forest of the green nursery according to the annual defecation sewage amount of the pig farm, irrigates the nursery and the fast-growing forest with the fecal sewage, digests all the fecal sewage of the pig farm, and protects the environment The forest around the pig farm also played a role in epidemic prevention and isolation The way of transmission of the disease was cut off, the incidence of pig disease was reduced, and the use of various drugs was greatly reduced In addition, the pig farm strictly controls the use of additives to ensure the quality of pork There are also considerable economic benefits in the economic forest around the pig farm It is estimated that there are at least 10000 to 20000 yuan of income per mu of forest land.