摘要
以长江中上游几种常见的水土保持林为对象,就植物根系对土壤结构的影响进行了初步研究,结果表明:林木根系通过径级≤1mm须根的作用,可以提高土壤的抗侵蚀能力,其原因在于死根提供有机质、活根提供分泌物作为土粒团聚的胶结剂,配合须根的穿插和缠结,促进了土粒的团聚,从而增强了土壤抗分散、悬浮的能力。
Influence of botanic roots on soil's structure had been studied in generally several shelter - forests in the upper - middle reaches of Yangtze Kiver. The results showed that rootscan improve the ability of soil anti-wash by the action of fineroots (≤1mm) . The reason could be: With the provision of excret - ion of living roots and humus of dead roots as soil, aggregates adhesives, and the fine roots crossing each other, the amount ofwater-stable aggregates could be increased, vohich could strengthensoil antiwash - dispersion capacity.
