Soil microbial biomass carbon in the tea plant rootlayer increased significantly with the age of tea plants.
茶树根层土壤微生物生物量碳随树龄增长而增加，但与茶树根层土壤可培养微生物总量无显著相关。
2
In this sample, the piece of content named Photo Book (shown in figure 10, in the bottom layer of the tree structure) is the default content of the root folder of the library.
在这个示例中，名为Photo Book的内容块(见图10中树结构的底层)是库的根文件夹的默认内容。
3
Acropetal differentiation of the cambium layer continues as the primary root elongates.