| 桑树根系对紫色土土壤抗剪强度的影响 |
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| 引用本文： | 南宏伟,贺秀斌,鲍玉海,王莉,刘艳锋.桑树根系对紫色土土壤抗剪强度的影响[J].中国水土保持,2011(8):48-51. |
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| 作者姓名： | 南宏伟 贺秀斌 鲍玉海 王莉 刘艳锋 |
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| 作者单位： | 1. 中国科学院,成都山地灾害与环境研究所,山地环境演变与生态调控重点实验室,四川,成都,610041;中国科学院,研究生院,北京,100049
2. 中国科学院,成都山地灾害与环境研究所,山地环境演变与生态调控重点实验室,四川,成都,610041 |
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| 基金项目： | 中国科学院西部行动计划项目，国家科技支撑计划项目，国家水专项 |
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| 摘 要： | 在重庆市忠县石宝镇选择桑树林地,每隔10 cm分层采集土壤样品,分离桑树根系与土壤,利用根系分析系统WinRHIZO分析根系的长度、体积和表面积等指标,同时测定紫色土土壤抗剪强度、紧实度、水分含量和容重等指标,利用逐步回归分析从形态学角度评价桑树根系对紫色土土壤抗剪强度的影响。结果表明:桑树根系根长密度总体上随土壤深度的增加而减少,中根及小根根体积密度随土壤深度的增加而增加,细根及极细根表面积密度则随土壤深度增加而减少;桑树林地土壤抗剪强度总体上随土壤深度的增加而增加,10—40 cm层林地土壤抗剪强度显著高于同层对照;紫色土土壤抗剪强度增加值主要来源于桑树平均根体积密度和土壤水分增加值的贡献,且前者是主要贡献者,桑树根系可以有效提高紫色土土壤抗剪强度。
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| 关 键 词： | 桑树 根系 紫色土 抗剪强度 三峡库区 |
Influence of Root System of Morus alba to Shearing Resistance of Purple Soil |
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| NAN Hong-wei,HE Xiu-bin,BAO Yu-hai,et al..Influence of Root System of Morus alba to Shearing Resistance of Purple Soil[J].Soil and Water Conservation In China,2011(8):48-51. |
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| Authors: | NAN Hong-wei HE Xiu-bin BAO Yu-hai |
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| Institution: | NAN Hong-wei1,2,HE Xiu-bin1,BAO Yu-hai1,et al.(1.Institute of Mountain Hazards and Environment,CAS,Chengdu,Sichuan 610041,China,2.Graduate School of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | It selects Morus alba woodland in Shibao Township of Zhongxian County in Chongqing,and takes soil samples in every 10 cm in layers.Separating root system and soil,it analyzes the length,volume and surface area of root system by using the root system analysis system of WinRHIZO.Simultaneously,it determines the indexes of shearing resistance,degree of compaction,water content and volume weight of the purple soil and evaluates the influence of root system of Morus alba to shearing resistance of purple soil fro... |
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| Keywords: | Morus alba root system purple soil shearing resistance the Three Gorges Reservoir region |
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