Effect of aluminum on the growth of sugar maple in solution culture

摘要: The effect of aluminum (Al) on the growth sugar maple (Acersaccharum Marsh.) was studied in two experiments nutrient solution containing from 0 to 2000 μM Al at pH 4. Visible symptoms injury shoots or roots were not observed either experiment. Reductions seedling shoot size 1000, 1500, and concentrations readily apparent; however, root biomass for these same did differ significantly 4 controls. A plot relative total dry matter accumulation versus showed that above 600 μM declined exponentially. Of mineral elements examined experiments, Ca most severely affected by increasing solution. Even 100 μM reductions leaf, stem, content 17, 13, 50% controls, respectively. Some stimulation slightly higher P K tissue low (100–500 μM) concentrations. At levels, P, K, Mg...