The invention provides a rice
seedling raising substrate sheet and a preparation method thereof and a
seedling raising method, and belongs to the technical field of rice
seedling raising, and the preparation method comprises the following steps: mixing decomposed
straw, an
adhesive and
biochar, spraying water to adjust the
water content to be 50-60%, and performing
hot pressing at the temperature of 120-150 DEG C to form a latticed separator; thoroughly decomposed
straw, thoroughly decomposed
livestock and
poultry manure and water are mixed and stirred and then ground into
slurry, the pH is adjusted to 6.0-6.5, and substrate
slurry is obtained; and filling meshes of the latticed separator with the matrix
slurry, carrying out vacuum suction
filtration molding, and
drying to obtain the rice seedling raising matrix sheet. The matrix slurry in the rice seedling raising matrix sheet adopts an acid regulation and
nutrient controlled release technology, a stable and coordinated
growth medium with a water, gas and
fertilizer structure can be provided for seedlings, meanwhile, root systems of the seedlings are orderly separated by the latticed separators in the growth process, the root systems of the seedlings are coiled in meshes, the
root system activity is high, and the quality of the seedlings is good.