Seasonal changes of ash content in mature leaves were the same as those in young leaves. Petioles had much lower ash content than roots in winter.
成熟叶的灰分含量一直维持在比较低的水平,而幼叶在秋季的灰分含量明显下降,在冬季明显上升,幼叶灰分含量的季节变化趋势与成熟叶的相同,叶柄的灰分含量在冬季明显低于根部。
参考来源 - 引种棕榈植物的耐寒适应性机制研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The ash content of the Pinus tabulaeformis branches is less than 0.52 % in the northwest margin areas.
城区西北边缘的公园区灰分含量最低，其值小于0 .52 % 。
However, the high ash content and logistical problems with collection and processing will limit full utilization of this resource.
但是，灰分含量高和收集加工上的困难制约了对它们的充分利用。
The secondary hydration of high fly ash content concrete is slow at the early period and then the velocity of it gradually increase.
高掺量粉煤灰混凝土早期二次水化较为缓慢，随后二次速度逐渐加快。
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