水土保持学报2017，Vol.31Issue(2)：40-44,5.DOI:10.13870/j.cnki.stbcxb.2017.02.008
茵陈蒿群落垂直结构对坡面产流产沙过程的影响
Effects of Artemisia capillaries Vertical Structures on the Processes of Runoff and Sediment Production
摘要
Abstract
By simulated rainfall experiments,we identified the effects of different vertical structures on runoff and sediment production processes in the community of Artemisia capillaries.The results showed that the reduction effects of runoff and sediment yield of the multi-layer vertical structure (Artemisia capillaries + Setaria viridis (L.) Beauv + biological crusts) and double-layer vertical structure (Artemisia capillaries + biological crusts) were significantly greater than those of the single-layer vertical structure (Artemisia capillaries) under the same condition of vegetation coverage.Compared with the single-layer vertical structure,the other two structures could reduce soil erosion significantly.In addition,runoff was reduced by 22.6％ and 40.5％ over the double-layer vertical structure and multi-layer vertical structure,respectively,and sediment yield was reduced by 73.5％ and 86.6％,respectively.The cumulative sediment yield could be expressed as a power function of the cumulative production flow (R2 ＞0.98),showing that the cumulative sediment yield increased with the augment of the runoff production,and the degree of the enhancement decreased when the community structure became more complex.The results also showed that plant roots could improve soil structure by increasing rainfall infiltration and reducing overland runoff,which was the key factor influencing the runoff and sediment yield processes.All results indicated that the ability of community to prevent soil erosion could be improved with complicated vertical structure and components.In conclusion,in order to provide the theory basis for grassland vegetation restoration and structural configuration optimization for the Loess Plateau,we have to study further the vertical structure of grassland community and reveal the mechanisms of soil and water conservation.关键词
茵陈蒿/群落垂直结构/产流产沙/草地生态系统/水土保持Key words
Artemisia capillaries/community vertical structure/runoff and sediment yield/grassland ecosystem/soil and water conversation分类
农业科技引用本文复制引用
李盼盼,王兵,刘国彬,李文达..茵陈蒿群落垂直结构对坡面产流产沙过程的影响[J].水土保持学报,2017,31(2):40-44,5.基金项目
国家自然科学基金项目“土壤有效N升高对白羊草群落特征及土壤侵蚀过程的影响机制”(41471438) （41471438）
西北农林科技大学基本科研业务项目“植被恢复影响坡面流土壤分离过程机理研究”(Z109021539) （Z109021539）
中国科学院“西部之光”人才培养计划西部博士资助项目“黄土高原植物根系抑制土壤侵蚀效应研究”(K318021403) （K318021403）
