| 摘要 |
PROBLEM TO BE SOLVED: To provide a new culture medium, a granular culture medium, method for producing the granular culture medium and a method for culturing crops. SOLUTION: This new culture medium comprises a slow-acting phosphatic fertilizer having the range of 7-9 of pH, the range of 5-20 wt.% concentration of citric-soluble phosphate ingredients therein and the range of <=0.1 wt.% concentration of water-soluble phosphate ingredients therein and a water retaining agent and exhibits effects that a seedling has a good root spread and the color of leaves of the seedling is free from yellowing and thinning during the raising of seedling when raising the seedling with using the culture medium as a culture soil for raising seedling.
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