香蕉钾高效基因型苗期筛选条件的研究

摘要

通过砂培试验,研究了不同供钾水平对香蕉不同基因型苗期相对生物量变异程度的影响及筛选钾高效香蕉基因型的最适宜生育时期及钾浓度.结果表明,适宜香蕉苗期钾菅养效率筛选的苗龄为9叶期,最适钾离子浓度为低钾0.025 mmol ·L-1和高钾2.50 mmol·L-1.结果表明,不周钾素水平下香蕉苗期干物质积累、钾效率和增长潜力的基因型存在显著差异,而根冠比不存在显著差异.%Effects of different potassium levels on relative biomass in banana seedling stage were studied by sand culture. The optimal screening conditions (stage and potassium level )were discussed. The results showed that the 0. 025 mmol·L-1-K+ and 2. 50 mmol·L-1 + K+ concentration of the medium were the suitable potassium levels in nine-leave stage of the plant. The results showed that there were significant differences in seedling dry weight, potassium efficiency and genotypes of banana growth potential but not in root/shoot ratio under different K+ concentration treatments.