Abstract:

Physiological acid fertilizer ammonium sulfate was chosen as a kind of alkalineity changing material for reed biomass charcoal, and research focused on improvement effects of mixture of ammonium sulfate and reed biomass charcoal on substrate property and tomato seedling development and growth. Research result showed, it could decrease reed biomass charcoal alkalinity significantly when ammonium sulfate added to substrate (P<0.05), and substrate electrical conductivity also be increased, but had no obvious effect on substrate bulk density. For tomato seedling, it showed that 0.5 g/L ammonium sulfate added to substrate could have the best effect on growth and development of tomato seedling, chlorophyll relative content, leaf length, leaf width, plant height, stem diameter, aboveground biomass, underground biomass and healthy index under 0.5 g/L ammonium sulfate added treatment were 5.74%, 13.31%, 22.42%, 44.06%, 16.75%, 42.99%, 26.92% and 23.19% respectively higher than treatment which had no ammonium sulfate but had reed biomass charcoal in substrate; and they were 11.56%, 28.22%, 31.42%, 71.85%, 50.46%, 64.81%, 81.65% and 77.63% higher than treatment which neither ammonium sulfate nor reed biomass charcoal in substrate.