养鸡场经营者王凯的生意一直顺风顺水,肉鸡的生长与出栏、蛋鸡的产蛋量都十分理想,可是自从她所在市某公司在她鸡场附近修建预制板厂以来,养鸡场的效益一落千丈。她发现小鸡明显变得惊恐不安,采食量下降,拉稀,整个鸡群的发病率和死亡率上升;蛋鸡的产蛋量明显下降,软壳蛋、脆壳蛋和血斑蛋增加;肉鸡生长速度减缓,肉质下降,经济损失达数万元。同 Chicken farmer Wang Kai’s business has been smooth, broiler growth and slaughter, laying hens are very good, but since a company in her city in the vicinity of her chicken farms built prefabricated mills, chicken farms The benefits plummeted. She found that chickens were apparently frightened, feed intake declining, diarrhea, and morbidity and mortality in the entire flock increased; laying hens were markedly reduced and soft shell eggs, crustaceans and spotted eggs were increased; Broiler growth slowed down, meat quality declined, the economic loss of tens of thousands of yuan. with