To understand the effect of chronic fluorosis on abnormality and mutation in chicks,36 one-day LuoManHe cocks were randomly divided into 6 groups of 6 each. I group drinking running water was control group, II ~ VI groups were fed with the fluorine water of 1.75g/L(l/27LD50),0.875 g/L,0.438g/L,0.219g/L,0.109g/L,respectively,for 90d.The Content of RBC and Hb, micronucleus rate and chromosome damage were observed. At the same time, 10 three-month cocks were randomly divided into 2 groups of 5 each...