水土保持研究2025，Vol.32Issue(5)：11-19,9.DOI:10.13869/j.cnki.rswc.2025.05.023
林下三七种植对林地土壤抗冲抗蚀性影响
Effects of understory Panax notoginseng planting on soil anti-scourability and anti-erodibility in forestlands
摘要
Abstract
[Objective]To reveal the features of soil anti-scourability and anti-erodibility in the forestland after understory Panax notoginseng planting,providing a theoretical basis for reducing soil and water loss and sustainable management of understory plantations.[Methods]The understory Panax notoginseng planting plots and forestland are taken as study objects.The soil anti-scourability and anti-erodibility are measured using the undisturbed soil tank scouring method and the static water disintegration method.Meanwhile,the physical and chemical properties of soil and root density were tested to analyze the key factors affecting soil anti-scourability and anti-erosion resitance.[Results]The soil anti-scourability coefficient on the ridges of understory Panax notoginseng plantations were significantly lower than that of natural forestlands(p<0.05).The anti-scourability coefficients on the ridges and furrows of understory Panax notoginseng plantations were 48.54%and 81.68%of those in natural forestlands,respectively.The soil anti-scourability coefficient showed an exponential relationship with time(R2>0.85).The soil anti-erodibility coefficients on the ridges and furrows of understory Panax notoginseng plantations were significantly lower than those of natural forestlands(p<0.05),being 96.32%and 92.11%of the values in natural forestlands,respectively.The soil anti-erodibility coefficient had a quadratic relationship with time(R²>0.95).Root mass density and the mean weight diameter of water-stable aggregates showed significant positive correlations with soil anti-scourability coefficient(p<0.05),while soil organic matter content and saturated hydraulic cond-uctivity exhibited significant positive correlations with soil anti-erodibility coefficient(p<0.05).Based on stepwise multiple regression results,the prediction models for soil anti-scourability and anti-erodibility in Panax notoginseng plantations based on root mass density,mean weight diameter of water-stable aggregates,soil organic matter content,and soil saturated hydraulic conductivity had R2 values of 0.90 and 0.82,respectively.These models effectively predicted soil anti-scourability and anti-erodibility.[Conclusion]Soil anti-scourability and anti-erodibility are closely related to soil properties and root mass density.Root mass density and the mean weight diameter of water-stable aggregates are key factors affecting soil anti-scourability in Panax notoginseng plantations,while soil organic matter content and saturated hydraulic conductivity are key factors affecting soil anti-erodibility.关键词
林下三七种植/抗冲性/抗蚀性Key words
understory Panax notoginseng planting/anti-scourability/anti-erodibility分类
农业科技引用本文复制引用
刘方严,黎建强,杨舒媛,刘艳娇,晏慧颖,赵思倩..林下三七种植对林地土壤抗冲抗蚀性影响[J].水土保持研究,2025,32(5):11-19,9.基金项目
昆明市科技"揭榜挂帅制"项目(2021-J-H-002-02) （2021-J-H-002-02）
云南省"兴滇英才支持计划"青年人才专项(XDYC-QNRC-2022-0205) （XDYC-QNRC-2022-0205）
云南省科技特派团创新引导与科技型企业培育计划项目(202204BI090003) （202204BI090003）
国家自然科学基金项目(32060345) （32060345）
