Plant-induced changes in soil structure: Processes and feedbacks
Plant-induced changes in soil structure: Processes and feedbacks
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DOI：
10.1023/a:1005944025343
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发表时间：
1998-08-01
期刊：
影响因子：
4
通讯作者：
Caron, J
中科院分区：
文献类型：
--
作者：
Angers, DA;Caron, J
土壤结构影响生活在土壤中的生物的生长和活动。作为回报，微生物、动物和植物影响结构。本文综述了植物在改良土壤结构中的作用。植被通过各种直接和间接的机制影响不同尺度的结构形式和稳定性。通过穿透土壤，根形成有利于流体运输的大孔隙。它们还造成破坏区，使土壤破碎并形成集料。这种现象是由与植物生长相关的湿润和干燥循环增强的。干燥也会导致土壤的收缩和强化。根系的固定和胶结物质的分泌使土壤结构稳定。最后，作为C的来源，根和植物残体为微植物区系和动物区系提供食物来源，有助于结构形成和稳定。反过来，植物引起的结构变化将主要通过改变根系物理环境以及水分和养分循环来影响植物生长。
Soil structure influences the growth and activity of organisms living in soil. In return, microbes, fauna, and plants affect structure. The objective of this paper is to review the role of plants in modifying soil structure. Vegetation affects structural form and stability at different scales and through various direct and indirect mechanisms. By penetrating the soil, roots form macropores which favour fluid transport. They also create zones of failure which contribute to fragment the soil and form aggregates. This phenomenon is enhanced by the wetting and drying cycles associated with plant growth. Drying also causes shrinkage and strengthening of the soil. Anchorage of roots and the exudation of cementing material stabilizes soil structure. Finally, as a source of C, roots and plant residues provide a food source to the microflora and fauna which contribute to structure formation and stabilization. In return, plant-induced changes in structure will affect plant growth mostly by modifying the root physical environment, and the water and nutrient cycles.