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Position: Home > Articles > Effect of Soil Reinforcement by Ostryopsis Davidiana Decaisne Root System Bulletin of Soil and Water Conservation 2010,30 (5) 229-231

虎榛子群丛根系的固土作用研究

作  者：
周建勤;贾宏涛;朱金兆;谢建强
单  位：
新疆农业大学草业与环境科学学院;新疆农业大学草业与环境学院;北京林业大学水土保持学院;北京林业大学水土保持学院新疆农业大学草业与环境学院
关键词：
抗剪强度;固土作用;土壤紧实度;根截面积率
摘  要：
共选样地18块,其中15块均为由虎榛子(Ostryopsis davidiana Decaisne)单一种组成的植被群落样地,另外选择对照样地3块,样地规格为5m×5m。18块样地均测定了地表以下20,40,60,80,100cm共5个层面的土壤抗剪强度,同时测定对照裸地样地的紧实度和虎榛子植被群落样地根截面积率。虎榛子植被群落样地土壤样品需去除裸地抗剪强度的影响。在研究林木根系固土作用时,必须消除土壤紧实度造成的影响。经测量计算,土壤样品根截面积率最大为1.014%,对应的抗剪强度增强值(也为最大值)为0.1346kN/m2。分析结果表明,虎榛子群丛根系对土壤抗剪强度的增强值与穿过剪切面的根截面积率呈线性正相关。
译  名：
Effect of Soil Reinforcement by Ostryopsis Davidiana Decaisne Root System
作  者：
ZHOU Jian-qin1,2,JIA Hong-tao2,ZHU Jin-zhao1,XIE Jian-qiang1(1.College of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;2.College of Grassland and Environment Science,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China)
关键词：
shear strength;soil reinforcement;soil compaction;ratio of sectional root area
摘  要：
18 sampling areas of size 5 m×5 m were selected,of which 15 sampling areas were composed of Ostryopsis davidiana Decaisne vegetation community only.Soil shear strengths at the depths of 20,40,60,80,and 100 cm in the 18 plots were measured.3 bare lands of size 5 m×5 m were selected and soil compaction and the ratio of sectional root area were measured as well.The effect of soil shear strength in bare land was then removed from the soil sample in Ostryopsis davidiana Decaisne vegetation community.By calculation,the ratio of sectional root area was 1.014% and the corresponding shear strength was the maximum value of 0.134 6 kN/m2.Analyses indicated that the increased value of soil shear strength in the Ostryopsis davidiana Decaisne vegetation community rood system was positively correlated to the ratio of sectional root area.

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