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General comment In the transport of feed and organic fertilizer, the difference between the two models lies in the transport of silage corn and organic fertilizer. In non-IPBS, silage corn is all purchased, assuming that the average transportation distance is 30km, and organic fertilizer is all sold to fruit and vegetable farmers, with an average transportation distance of 20km. The transportation distance of the two is 1km. Different transportation distances will lead to different energy consumption, and thus different impacts on the environment. Relevant studies have shown that long distance transport of organic fertilizers will increase the loss of N and P in feces and increase the risk of eutrophication in water [11]. According to the investigation, the fertilizer value of liquid fertilizer is low, and vegetable and fruit farmers are reluctant to buy liquid fertilizer. The liquid fertilizer of the two modes is sprayed by the farm car to the surrounding farmland or farm farmland, and the transportation distance is 1km. The other feed transportation distance of the two modes is the same, and the concentrated feed, soybean meal, corn kernel and wheat bran are from the local market, and the transportation distance is the same About 50km. Cottonseed from Gansu Province, the transport distance of about 1830km. Leymus chinensis from Heilongjiang Province, the transport distance of about 1720km. Oats and alfalfa come from the United States and travel a distance of about 18,000 km |
