树种多样性配置提高土壤养分利用的机制与策略

Mechanisms and Strategies of Tree Species Diversity Configuration for Improving Soil Nutrient Utilization

文章通过分析混交林中根系空间结构以及凋落物分解速率、养分偏好和生物量分配模式等生理过程的差异及变化,总结了这种差异及变化影响土壤养分供给、吸收及利用效率的机制与策略,这为构建城市绿化树种多样性配置,消除城市困难立地土壤质量差、植物必需元素含量低等土壤障碍因子提供了理论依据;在此基础上,针对城市困难立地特点,提出了开展城市树种多样性配置提高土壤养分利用研究的相关建议。

This paper summarized the mechanisms and strategies with which the variation and changes in spatial structure of root system and physiological processes such as litter decomposition rate,nutrient preference and biomass allocation patterns in mixed forest affect the supply,capture and use efficiency of soil nutrients.It provided a theoretical basis for constructing urban landscaping tree species diversity configuration and eliminating soil barrier factors such as poor soil quality and low content of essential nutrients.At the end,with an eye to the characteristics of urban challenging sites,suggestions were put forward for carrying out the study of urban tree species diversity configuration to improve soil nutrient utilization,and the issues to be considered were pointed out.