Evaluation of fishery water Quality of the spawning ground of Yellow River Carp in Yiluo River
伊洛河黄河鲤天然产卵场渔业水质评价

The N and P nutrient salts such as total nitrogen(TN) , total phosphorus(TP),and other physic-chemic indexs such as pH value ,temperature (T),chemical oxygen demand(CODMn),volatile phenol,cuprum,zinc,plumbum,cadmium,hydrargyrum of the spawning groumd of Yellow River carp in Yiluo River were monitored from May and August 2004 to 2009.Water quality variation trend and quality status were also evaluated and comprehensively assessed. The results showed the water quality of the spawning ground of Yellow River carp was in a volatile state with good water quality in the years of 2004,2005 and 2009.Hower ever,in the years of 2006,2007 and 2008,water quality was seriously polluted. In the monitoring years, pollution degree was going down after rising; the main pollutants were total nitrogen, total phosphorus chemical oxygen demand.