| 摘要 |
PURPOSE: To strengthen the life maintenance of a plant or crop by using a spray agent contg. calcium sulfate and an organic acid or its salt. CONSTITUTION: In this spray agent, as the calcium sulfate, powdery natural calcium sulfate having >=96wt.% purity, such as CaSO4 .2H2 O having a <=50μm, particularly about 10 to 30μm average particle size, or powdery synthetic calcium sulfate having >=99wt.% purity is used. Also, as the organic acid or its salt, a mixture obtained by mixing an aliphatic carboxylic acid or its salt, or the like, such as succinic acid or calcium succinate having a <=50μm, particularly about 10 to 30μm average particle size with an amino acid or its salt, such as glycine in a radio of (aliphatic carboxylic acid)/(amino acid) within the range of 0.3/1 to 1/1 is used. Then, a high blending ratio of the powdery calcium sulfate and a low blending ratio of powdery organic acid or its salt are blended together to obtain the objective spray agent. A solution prepared by dissolving 1kg of this spray agent in 300 to 1,000l of water is sprayed on a crop.
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