The invention relates to a preparation method and application of a
lime seedling culture substrate. The preparation method of the
lime seedling culture substrate comprises the following steps: soaking coco
coir in
citric acid for 24 hours to obtain coco
coir A; carbonizing the carbonized rice husks at 550 DEG C for 30 minutes, and spraying
sodium silicate for curing to obtain carbonized rice husks B; premixing the wormcast and the
silicon carbide nanoparticles to obtain a
biochar mixture; the preparation method comprises the following steps: stirring and fermenting coco
coir A, a
biochar mixture and carbonized rice
husk B until the pH is 6.0 and the EC is 0.4 mS / cm to obtain a fermented material, sterilizing the fermented material through
cobalt-60, adding
vermiculite, a complex
microbial inoculant and a slow-release
nutrient, uniformly stirring and mixing at-0.05 MPa, and curing for 48 hours in a
darkroom at 25 DEG C. The prepared matrix is used for industrial container
seedling culture of
lime, and under the conditions that the day temperature is 25 + / -2 DEG C / night temperature is 18 + / -2 DEG C and the illumination is 30000
Lux, the yield of the lime is increased, and the yield of the lime is increased. 60 days after
sowing, the seedling rate reaches 92.0%, the root activity is 120 [mu] g TF / g.h, and the seedling raising efficiency and quality are significantly improved.