不同杀菌剂与杀菌时间对发财树残根生长的影响

    Effects of fungicides and bactericides and germicidal time on the growth of residual root of Pachira macrocarpa

    • 摘要: 【目的】筛选发财树 Pachira macrocarpa 残根的最佳杀菌剂和最佳杀菌消毒时间.【方法】用1.25 g·L-1 的多菌灵、甲霜灵锰锌、农用链霉素、甲基托布津和2.0 g·L-1 高锰酸钾溶液对发财树残根进行不同时长的消毒灭菌处理,研究不同杀菌剂、不同消毒灭菌时间对发财树残根的芽长、叶片鲜质量、根长、根质量、出根数、根系活力的影响.【结果和结论】 对发财树残根杀菌效果最理想的菌剂是多菌灵,其次为甲基托布津,再次为甲霜灵锰锌和高锰酸钾,农用链霉素的杀菌效果最差;发财树残根的最佳消毒灭菌时长为0.5和1.0 h,消毒灭菌时间过长(12 h)对发财树残根的生长反而有明显的抑制作用.

       

      Abstract: 【Objective】To screen the best fungicide and the best germicidal time of Pachira macrocarpa.【Method】 The effects of different fungicides and bactericides with different germicidal times on the residual root of reclaimed P. macrocarpa were investigated through pot experiments with peat soil. Five fungicides and bactericides (carbendazim, metalaxyl mancozeb, agricultural streptomycin, thiophanate methyl and potassium permanganate) were selected to study their effects on the shoot length,leaf mass,root length,root numbers,root mass,and root activities of the residual root of the reclaimed P. macrocarpa. The concentration of carbendazim, metalaxyl mancozeb, agricultural streptomycin, and thiophanate methyl was 1.25 g·L-1 while potassium permanganate was 2.0 g·L-1.【Result and conclusion】 The results showed that the best fungicide and bactericide was carbendazim, followed by thiophanate methyl, with the third being metalaxyl mancozeb and potassium permanganate and the least effective fungicide and bactericide being agricultural streptomycin. The preferred germicidal time was 0.5 and 1.0 h. The growth of the residual root of P. macrocarpa was significantly inhibited when it was disinfected over time(12 h).

       

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