Pot experiments applying N and P fertilizers were carried out to study the effects of the fertilizers on shoot height, single leaf area, chlorophyll, soluble protein, dry matter of root and shoot,length and diameter of root, and root: shoot ratios of woad (Isatis indigotica Fort. ). The results showed that N fertilizer have obvious positive effects on the shoot height, single leaf area, chlorophyll, and dry matter accumulation. The content of soluble protein was increased after application of N and P fertilizers. R/S ratios was decreased whe...