添加硫酸铵的生物质炭型育苗基质使用效果研究

Studies on Application Effect of Biomass Charcoal Seedling Substrate after Added Ammonium Sulfate

以生理酸性肥料硫酸铵为芦苇炭化物的碱性改良材料,研究二者配比使用对番茄育苗基质的改良作用和促进番茄幼苗生长发育的效果。研究结果表明,基质中添加硫酸铵可以显著降低基质中由于含芦苇炭化物而偏碱性特点(P<0.05),而且基质的电导率亦随着硫酸铵添加量的增加而增大,但对基质容重的影响不大。在含芦苇炭化物的育苗基质中添加0.5g/L的硫酸铵,番茄幼苗的叶片叶绿素相对含量(SPAD)、叶长、叶宽、株高、茎粗、地上生物量、地下生物量和壮苗指数比不加硫酸铵但加芦苇炭化物的基质分别高出5.74%、13.31%、22.42%、44.06%、16.75%、42.99%、26.92%和23.19%;比既不加芦苇炭化物也不加硫酸铵的基质分别高出11.56%、28.22%、31.42%、71.85%、50.46%、64.81%、81.65%和77.63%。

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 （P0.05）, 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.