人工林树干直径增量以地径处最大，向上逐渐变小，从枝下高处又开始增大，直到冠部。
The maximum increment of stem diameter was at bottom, diminished up to branch height, then increased to crown.
人工林树干直径增量以地径处最大，向上逐渐变小，从枝下高处又开始增大，直到冠部。
The maximum increment of stem diameter was at bottom, diminished up to branch height, then increased to crown.
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