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用不同浓度Ｓ－３３０７和ＰＰ３３３溶液浸种试验表明，这两种生长延缓剂对水稻秧苗都有明显的壮秧增蘖作用。其作用随浓度提高和浸种时间的延长而增强。用生长量苗高x单株分蘖数）来判断最适施用浓度，在本试验条件下，对照秧苗的生长量为４２．１；用０．５１０－６Ｓ－３３０７浸种７２ｈ的秧苗生长量为５３．６；用５１０－６ＰＰ３３３浸种７２ｈ的秧苗生长量为５２．７。说明以上浸种浓度和时间为最佳处理。用Ｓ－３３０７和ＰＰ３３３浸种后，水稻苗叶片叶绿素含量提高，光合性能改善。秧苗叶片在０～２℃低温下，各处理电导度比对照小，说明细胞结构遭受破坏程度减轻，质膜仍具有一定的半透性，使外渗物质减少，表现出电导度增加不多。
Soaking seedlings with different concentrations of S-3307 and PP333 solution showed that both of the two growth retardants had significant growth-enhancing effect on rice seedlings. Its role with increasing concentration and soaking time increased. With the growth of seedling height × tiller number per plant) to determine the optimum application concentration, under the conditions of the test, the control seedling growth was 42.1; 0.510-6S-3307 seed soaking 72h seedling growth was 53 .6; The growth of seedlings with soaking with 510-6PP333 for 72h was 52.7. Explain the above soaking concentration and time for the best treatment. After soaking seeds with S-3307 and PP333, the content of chlorophyll in rice seedling increased and the photosynthetic characteristics improved. The seedling leaves at 0 ~ 2 ℃ low temperature, the conductivity of the treatment is smaller than the control, indicating that the damage suffered by the cell structure to reduce the quality of the membrane still has some semi-permeability, reducing the extravasation material, showed little increase in conductivity.