摘要
【目的】探究毛竹(Phyllostachys edulis)入侵对阔叶林土壤物理性质产生的影响。【方法】在江西省贵溪市阳际峰自然保护区从不同林分类型、不同海拔的角度出发,分析土壤机械稳定性团聚体,土壤容重、土壤含水率、土壤持水性、土壤孔隙度。【结果】毛竹入侵阔叶林导致的林分类型变化,对改善土壤机械稳定性团聚体起到了积极作用。土壤含水率的变化说明毛竹林相较于阔叶林需要更多的水分维持自身竞争的优势,毛竹根系分泌物对表层土壤起到了一定破碎作用,导致竹阔混交林土壤最大持水量显著高于阔叶纯林土壤最大持水量。毛竹入侵对土壤非毛管孔隙度与毛管孔隙度产生影响较大,其中竹阔混交林土壤非毛管孔隙度显著高于毛竹纯林、阔叶纯林土壤非毛管孔隙度,竹阔混交林与阔叶纯林之间土壤总孔隙度差异较明显。【结论】毛竹入侵对土壤物理性质产生了积极效应,而这又促进毛竹向周边森林入侵,形成稳定循环。毛竹入侵对土壤物理性质影响机制,改善了土壤的物理性状,使毛竹入侵效率得到提升。
[Objective]In order to explore the effect of Phyllostachys edulis invasion on soil physical properties in broad-leaved forest.[Method]This study from the perspective of different forest types,different altitude,the analysis of the mechanical stability of soil aggregate,soil bulk density,soil moisture content,soil water,soil porosity.[Results]The results showed that the change of stand type caused by the invasion of bamboo into broad-leaved forest played a positive role in improving soil mechanical stability aggregates.The change of soil moisture content shows Ph.edulis forest need more water than broad-leaved forest to maintain competitive advantage,bamboo root secretion for crushing the surface soil have played a role,the bamboo mixed soil maximum moisture capacity and broadleaf pure forest soil maximum moisture capacity difference significantly but does not exclude the influence of elevation level exists.Correlation analysis shows that bamboo invasion has a great influence on soil non-capillary porosity and capillary porosity,among which,there is a significant difference in soil non-capillary porosity between mixed forest of bamboo and pure forest of bamboo and pure forest of broad leaves,and a significant difference in total soil porosity between mixed forest of bamboo and pure forest of broad leaves.[Conclusion]It indicates that the invasion of Ph.edulis has a positive effect on the physical properties of soil,and it will promote the invasion of Ph.edulis to the surrounding forests.This model of the effect of invasion of Ph.edulis on the physical properties of soil has improved the efficiency of invasion of Ph.edulis.However,only 0~20 cm topsoil was taken in this study,and further studies on the influence of bamboo invasion on the physical properties of deep soil should be added.
作者
崔诚
张俊涛
郭晓敏
Cui Cheng;Zhang Juntao;Guo Xiaomin(Guangzhou Academy of Forestry and Landscape Sciences,Guangzhou Guangdong 510405,China;Jiangxi Agricultural University,Nanchang Jiangxi 330045,China)
出处
《南方林业科学》
2020年第1期1-6,共6页
South China Forestry Science
基金
江西省高等学校科技落地计划项目：毛竹林集约养分管理及平衡技术示范推广(项目编号：KJLD13024)
关键词
毛竹入侵
林分类型
土壤物理性质
土壤团聚体
土壤持水性
土壤孔隙度
Phyllostachy edulis invasion
forest type
soil physical properties
soil aggregate
soil water retention
soil porosity
作者简介
崔诚,男,研发员,硕士,主要从事土壤改良相关工作。E-mail:254797352@qq.com;通信作者:郭晓敏,女,教授,博士,主要从事林业研究工作。E-mail:550537771@qq.com。
