Effects of Tree Species Diversity on Fine Root Morphological Characteristics, Productivity and Turnover Rates

编号 010037303

推送时间 20221212

研究领域 森林生态 

年份 2022 

类型 期刊 

语种 英语

标题 Effects of Tree Species Diversity on Fine Root Morphological Characteristics, Productivity and Turnover Rates

来源期刊 forest

期 第373期

发表时间 20221021

关键词 fine root morphological characteristics;  fine root productivity;  fine root turnover rate;  species diversity; 

摘要 Fine roots (φ ≤ 2 mm) play an important role in the process of material and nutrient cycling in forest ecosystems, but the effect of tree species diversity on the functional characteristics of fine roots is unclear. In this study, 1?7 subtropical communities with different species richness were selected to study the morphological characteristics, productivity (PRO), and turnover rate (TUR) of fine roots by continuous soil core extraction, ingrowth soil core method, and root analysis system. The effects of tree species diversity on fine root morphological characteristics, PRO, and TUR are also analyzed. The results showed that with the increase in tree species diversity in the community, the effect of fine root morphological characteristics including specific root length (SRL) and specific surface area (SSA) of each community was not significant, but the fine root PRO in the community increased from 71.63 g·m?2·a?1 (Ligustrum lucidum pure forest) to 232.95 g·m?2·a?1 (Cinnamomum camphora mixed forest with seven species richness communities), and the fine root TUR increased from 0.539 times·a?1 to 0.747 times·a?1. Correlation analysis and redundancy analysis showed that species richness, root functional traits, and soil physicochemical properties were important driving factors affecting root characteristics. The increase in tree species diversity did not change the morphological characteristics of fine roots but increased the PRO and TUR of fine roots.

服务人员 王璐

服务院士 蒋有绪

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