植物细根功能性状的权衡关系研究进展

孙佳慧, 史海兰, 陈科宇, 纪宝明, 张静

Research advances on trade-off relationships of plant fine root functional traits

SUN Jia-Hui, SHI Hai-Lan, CHEN Ke-Yu, JI Bao-Ming, ZHANG Jing

表1 细根分类方法的优缺点(引自McCormack et al., 2015)

Table 1 Advantages and disadvantages of fine-root classification approaches (referred from McCormack et al., 2015)

分类方法 Approach 描述 Description 优点 Advantage 缺点 Disadvantage 传统分类方法 Traditional classification 直径≤2 mm的细根集合 Roots ≤2 mm in diameter grouped together 快速, 不需要事先了解采样地点和物种 Fast, requires no prior knowledge of site or species 根系性状和生物量数据很难跨物种和地点进行解释和比较, 不适用于多物种相同直径的根系比较 Root trait and biomass data are difficult to interpret and compare across species and sites, it is not applicable to the comparison of root systems with the same diameter of multiple species 根序分类方法 Order-based classification 直径≤2 mm的根按根序分类 Roots ≤2 mm in diameter separated into individual root orders 可以跨越物种和地点比较根性状 Consistent and accurate comparisons of root traits across species and sites 工作量较大且耗时 Labor-intensive and time-consuming 功能分类方法 Functional classification 根据根系分级与解剖特征, 将直径≤2 mm的细根分为具有吸收和运输作用的根 Roots ≤2 mm in diameter were separated into absorptive and transport fine roots according to root orders and anatomical traits 适用于功能相似的根之间进行比较, 比顺序分类方法快速 Enables comparisons among functionally similar roots, faster than order-based 需要事先了解根系解剖特征, 根据解剖特征来确定分支层次中的功能划分 Might require a prior assessment of root anatomical traits to determine functional divisions within branching hierarchy