Effects of Different Concentrations of Nutrient Solution on Seed Germination and Seedling Growth of Three Spruce
In this study,the Picea mongolia and its related species,Picea koraiensis and Picea meyeri,were used as the test materials.Five nutrient solution concentrations and one control treatment were set to explore the effects of different nutrient solution concentrations on the seed germination and seedling growth of the three spruce species.The results showed that:(1)The germination rate,germination potential,and germination index of the three spruce showed a trend of first increasing and then decreasing with the increase of the nutrient solution concen-tration.Although the Picea meyeri and the Picea koraiensis fluctuated and increased,the overall still showing a downward trend.The germination rate,germination potential and germination index of the three types of spruce under C1 increased,and the inhibition of Picea mongolia under C5 was the most obvious.(2)Comparing three kinds of spruce under the same nutrient solution concentration,except for C5,the germination rate,germination vigor and germination index of Picea mongolia are significantly higher than that of Picea koraiensis and Picea meyeri.(3)The effect of different concentrations of nutrient solution on the root growth of the three spruce showed a trend of increasing first and then decreasing.C1 promoted the growth of the roots to a certain extent and then began to be inhibited to varying degrees.(4)Using the membership function to comprehensively analyze the in-dicators of the three spruce,the Picea mongolia has the most obvious response effect to the nutrient solution,followed by the Picea koraiensis,and the Picea meyeri again.This study systematically compares the indexes of Picea mongolia,Picea meyeri,and Picea koraiensis under different nutrient solution concentrations.By studying the effects of different nutrient solution concentrations on the seed germination and seedling growth of the three spruce species,it revealed the initial nutrient requirements of the three spruce species and provided a scientific basis for the development and utilization of local spruce species.
PiceaNutrient solutionSeed germinationGrowth index
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