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随着家禽饲养量的增加和人们对环境质量要求的提高,家禽生产排泄物作为污染源之一,已成为家禽业生产发展和环境保护的重大问题。据1995年不完全统计,全国已建有存栏万只以上蛋鸡场2208个,肉鸡场7938个,除工厂大规模饲养形式外,还建有一大批存栏万只以下的机械化和半机械集体和农户养鸡场,全国年养鸡存栏量已达25亿只,其
With the increase of poultry raising and the improvement of people’s environmental quality requirements, poultry production of excrement, as one of the sources of pollution, has become a major issue in the development of poultry production and environmental protection. According to incomplete statistics in 1995, there were 2,208 farms and 7,938 broiler farms in the country, with a large number of mechanized and semi-mechanical collectives and farms with a total population of 10,000 or less Chicken farms, the national annual chicken stock has reached 2.5 billion, its