Cucumber seedlings were grown in compound substrate composed of vermiculite, straw charcoal, perlite, coal ash and organic fertilizer At the same time volume weight, specific weight, total porosity, organic content, pH,EC,TDS and quick-acting N, P, K of the substrate were analyzed At three-leaf period, the fresh, dry weight, photosynthesis and N, P, K were investigated The results showed that seedling quality appeared significant difference among different treatments Growth potential, mineral absorp...