Cultivation experiments on super-high-yield (≥12000kg/ha) of summer corn (Zea mays L. )were conducted in Laizhou, Shangdong Province, from 1986 to 1997, and in
The effects of exogenous NO on Eimeria tenella oocysts were studied. The E. tenella oocystsfreshly isolated from feces of experimental chickens infected with E.