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Age-specific sap flux density (mean + STD) of Moso bamboo over five spring phenological stages (incubation, culm-elongation, branch-development, leafing, established stages of newly sprouted culm). The presented age-specific sap flux densities are averaged values from 3 to 6 bamboo culms for each age category in one sunny day, where photosynthetic photon flux density larger than 35 mol m–2 day–1.
