不同土壤水分条件下雷竹无性系的生长

Growth of Phyllostachys praecox cv. Prevernalis Clone in Different Conditions of Soil Moisture

对雷竹在不同水分梯度中的无性系生长的形态可塑性和生物量投资分配格局进行了细致的实验研究，结果表明，随着土壤水分含量的增加，雷竹无性系分株增多，无性系生物量增大。在不同水分梯度下，无性系根茎总长、分株根茎长度和隔离者长度存在显著差异，随着土壤水分含量的提高，无性系根茎总长和隔离者长度显著降低。这说明雷竹无性系的根茎和隔离者具有很强的形态可塑性。根茎节间长度和分枝角度在不同土壤水分含量条件下没有明显变化。在较低的水分供应条件下，雷竹无性系把更多的生物量投资于地下部分，使根茎伸长，以便从土壤中获取更多水分。

Study on morphological plasticity of growth and on distribution pattern of biomass of Phyllostachys praecox cv. Prevernalis clone in different conditions of soil moisture demonstrated that ramet and biomass had positive relation. Under the same conditions, the length of clone rhizome, of ramet and of spacer had significant difference showing that rhizome and spacer had great morphological plasticity. While internode length and branching angle had no evident difference with different soil moisture treatments. With small water supply, the clone invested much biomass to underground part for absorbing much water from soil.