福建林业科技2025，Vol.52Issue(4)：56-64,9.DOI:10.13428/j.cnki.fjlk.2025.04.008
不同红锥混交林对土壤理化性质的影响
Effects of Different Mixed Castanopsis Hystrix Forests on Soil Physical and Chemical Properties
摘要
Abstract
To investigate the effects of Castanopsis hystrix mixed with different tree species on the physical properties,chemical prop-erties,and stoichiometric ratios of forest soil.20-year-old Castanopsis hystrix mixed forests in Gaofeng Forest Farm were selected as the research objects.Differences in soil physical-chemical properties and stoichiometric ratios in the 0-30 cm soil layer were com-pared among three forest types:Castanopsis hystrix-Pinus massoniana mixed forest(MCP),Castanopsis hystrix-Acacia crassicarpa mixed forest(MCA)and pure Castanopsis hystrix forest(PCH).Based on 18 soil indicators,principal component analysis(PCA)was used to evaluate soil quality under different mixed forests.The results showed that:in terms of soil physical properties,Castanopsis hystrix mixed forests reduced soil bulk density and improved soil looseness.Specifically,MCP increased soil non-capillary water-holding capacity and non-capillary porosity,while MCA enhanced soil moisture content,maximum water-holding capacity,capillary water-holding capacity,field capacity,capillary porosity,and total porosity.Regarding soil chemical properties,Castanopsis hystrix mixed forests significantly increased soil pH.MCP improved the contents of soil organic carbon(SOC),total nitrogen(TN),ammoni-um nitrogen(NH+4-N),and nitrate nitrogen(NO-3-N),whereas MCA increased the contents of total phosphorus(TP),available phosphorus(AP),total potassium(TK)and available potassium(AK).For stoichiometric ratios,the carbon-to-phosphorus(C/P)ratio in the 0-10 cm soil layer of MCA was significantly higher than that in the 10-20 cm and 20-30 cm layers.PCA results in-dicated that the comprehensive soil quality scores of the three forest types followed the order:MCA>MCP>PCH.Overall,Castan-opsis hystrix mixed forests effectively improved soil physical-chemical properties,enhanced soil structure,aeration,and water reten-tion capacity and promoted soil nutrient accumulation.Among them,the mixture of Castanopsis hystrix and Acacia crassicarpa exhibi-ted the best improvement effect on soil properties.This study provides a scientific reference for the selection of mixed tree species and cultivation of Castanopsis hystrix mixed forests.关键词
红锥/混交林/土壤理化性质/主成分分析Key words
Castanopsis hystrix/mixed forest/soil physical and chemical properties/principal component analysis分类
农业科技引用本文复制引用
黄世芳,韦护严,陆珍先,杨梅,黄芳,徐圆圆,黄正根..不同红锥混交林对土壤理化性质的影响[J].福建林业科技,2025,52(4):56-64,9.基金项目
广西自筹林业科技项目(2024GXZCLK 20) （2024GXZCLK 20）
