【摘要】 在７５０ 倍的井冈霉素药液中加入０ ．０１ ％ 、０ ．０２ ％ 和０ ．０４ ％ 浓度的表面活性剂ＡＰＳＡ８０ 后，其表面张力降低了３２ ．８７ ％ ～５３ ．６６ ％ 、药液液滴在水稻的叶表面和叶背面的接触角分别降低了２５ ．２６ ％ ～５１ ．９８ ％ 和３６ ．８８ ％ ～４７ ．３４ ％ ，在叶鞘上降低２２ ．３８ ％ ～３７ ．１８ ％ ；药液在叶片上的沉积量提高约１ ．６ 倍； 盆栽试验结果表明，ＡＰＳＡ８０ 能够提高井冈霉素药液抗雨水冲刷能力； 田间药效试验结果显示，ＡＰＳＡ８０ 能够提高井冈霉素防治纹枯病的效果和延长其持效期。药后１４ ｄ ，加入０ ．０２ ％ 和０ ．０４ ％ ＡＰＳＡ８０ 的处理防效明显高于单用；药后２１ ｄ ，加入０ ．０４ ％ 的，防效仍保持８６ ．５８ ％ （９６ 年） 和９０ ．９３ ％ （９７ 年） ，极明显高于单用更多还原

【Abstract】 When aqueous solution of 750-fold Jinggangmycin was added with 0.01%, 0.02% or 0.04% surfactant APSA 80, the surface tension of the solution reduced by 32.87%- 53.66%. Contact angle of droplet decreased by 25.26%-51.98%, 36.88%-47.34%, and 22.38%- 37.18% on upper surface, lower surface and leaf sheath, respectively. The amount of deposit of chemical increased about 1.6 times. Result of test on potted plants indicated that APSA 80 could improve the rainfastness of Jinggangmycin. Field experiment showed that APSA 80 could increase efficacy of Jinggangmycin and prolong its active duration. Fourteen days after application, efficacy of Jinggangmycin prepared with 0.02% or 0.04% APSA 80 was significantly higher than without surfactant. Twenty-one days after application, efficacy of Jinggangmycin mixed with 0.04% APSA 80 remained 86.58% (1996) and 90.93% (1997), which is much higher than it was used alone.更多还原