The key techniques to insure the quality and high yield are adjusting density timing and managing different tree ages as the growth of plant in construction of GAP bases.
结论保证金银花优质、高产的关键技术是：随树龄增长，适时调整密度，在GAP基地建设中，对不同树龄植株要分类管理。
The biomass of larch plantation of different site conditions and forest ages could be estimated by incorporating the individual tree biomass model and diameter distribution prediction model.
结合单木生物量模型和林分直径分布预估模型可以对不同立地、不同林龄下落叶松林分各组分的生物量进行预测。
The differences in single tree timber volume enhance with the increase of stand ages, but the increasing percentage decrease.
两种源单株材积随林龄加大，差异增大，但增长百分比随之减少。
The relationship between occurrence of the disease and the ages of tree, soil, cultivars and the lever of management is investigated.
调查了猕猴桃根癌病的发生与树龄、土壤、品种和管理水平的关系。
The relationship between occurrence of the disease and the ages of tree, soil, cultivars and the lever of management is investigated.
调查了猕猴桃根癌病的发生与树龄、土壤、品种和管理水平的关系。
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