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资源和环境问题是全球关注的热点话题。目前我国的环境污染问题已经从工业转向农业,其中畜禽养殖和饲料污染是农业污染中的重要一环。从事畜牧业的同志都熟悉这样一组数据:1头猪1天平均排泄粪尿6千克,产生污水30千克,万头猪场每天排污300吨。1只鸡1天平均排泄粪便36克,10万只鸡
The issue of resources and the environment is a hot topic of global concern. At present, the problem of environmental pollution in our country has shifted from industry to agriculture. Livestock and poultry breeding and fodder pollution are important agricultural pollution. The gay people engaged in livestock husbandry are all familiar with such a set of data: 1 pig per day discharges 6 kg of excreted urine on average, resulting in 30 kilograms of sewage and 300 pigs per day in 10,000 pig farms. An average of 1 day chicken excrete feces 36 grams, 100,000 chickens