College of Horticulture，China Agricultural University，Beijing Key Laboratory of Growth and Development Regulation of Protected Vegetables，Beijing 100193，China
摘要 以千禧为试验材料，筛选了在夏季高温条件下有利于提高番茄幼苗质量的最适多效唑和生物刺激素（氨基酸类和海藻类）浓度，研究了最适浓度多效唑、生物刺激素及二者复配使用对番茄幼苗质量的影响。结果表明：多效唑、氨基酸类生物刺激素、海藻类生物刺激素均有利于提高番茄幼苗质量，适宜浓度分别为0.2、0.6、1.4 g · L-1。多效唑与生物刺激素复配使用能够进一步提高番茄幼苗质量。在最适浓度下，相较于单一处理，多效唑与氨基酸类生物刺激素或海藻类生物刺激素复配使用处理的番茄幼苗壮苗指数分别提高了16.6%～31.7% 和8.7%～25.4%。综上，夏季高温条件下，0.2 g · L-1 的多效唑与0.6 g · L-1 的氨基酸类生物刺激素或1.4 g · L-1 的海藻类生物刺激素复配使用，均能有效提高番茄幼苗质量。
Abstract：This study took‘Qianxi’tomato as the experimental material to screen the optimum concentrations of paclobutrazol and biostimulant（amino acid and marine algae）that are benefited for improving the quality of tomato seedlings under high temperature conditions in summer and explore the effects of the optimal concentrations of paclobutrazole，biostimulant and their combination on the quality of tomato seedlings．The results showed that paclobutrazol，amino acid biostimulant and marine algae biostimulant were all beneficial for improving the quality of tomato seedlings，with optimal concentrations of 0.2 g · L-1，0.6 g · L-1 and 1.4 g · L-1，respectively．The combination of paclobutrazol and biostimulant could further improve the quality of tomato seedlings．At the optimal concentration，compared with single treatment，paclobutrazol combined with amino acid biostimulant or marine algae biostimulant increased the seedling index of tomato seedling by 16.6%-31.7% and 8.7%-25.4%，respectively．In conclusion，the combination of 0.2 g · L-1 paclobutrazol with 0.6 g · L-1 amino acid biostimulant or 1.4 g · L-1 marine algae biostimulant can effectively improve the quality of tomato seedlings under high temperature conditions in summer．
