北京林业大学学报2026，Vol.48Issue(5)：72-81,10.DOI:10.12171/j.1000-1522.20250507
间伐强度对干热河谷香椿人工林生长及土壤性状的影响
Effects of thinning intensity on stand growth and soil properties of Toona sinensis plantations in dry-hot valleys
摘要
Abstract
[Objective]This paper explores the effects of thinning intensity on stand growth and soil properties of Toona sinensis plantations,aiming to screen efficient thinning models suitable for constructing multi-layered,uneven-aged T.sinensis forests and to provide theoretical support for improving the quality of near-mature T.sinensis plantations.[Method]A 21-year-old monoculture T.sinensis plantation in Guangxi Yachang Forest Farm of southern China was subjected to three thinning intensities:TPH(retaining 1 050 tree/ha),TPM(750 tree/ha),and TPL(450 tree/ha),with unthinned stands as the control(CK).Precious tree species such as Zelkova schneideriana and Phoebe bournei were under-planted in a 1∶1 ratio under the thinned and control stands.Differences in stand growth,soil physicochemical properties,and enzyme activities under different treatments were systematically compared.[Result](1)Thinning significantly promoted the increase of DBH,tree height,and stand volume of T.sinensis.The TPH treatment was most conducive to the increase of tree height and volume growth,while TPL most strongly promoted DBH growth.(2)Growth of under-planted seedlings differed significantly among treatments(P<0.05),with ground diameter and seedling height increments ranking as TPM>TPH>TPL>CK.(3)Thinning significantly affected soil physicochemical properties.TPH performed best in improving soil pH,organic matter,total nitrogen,total phosphorus,available potassium,and available phosphorus;TPM showed the greatest advantage in increasing total potassium;while CK performed best in reducing bulk density and increasing moisture content and available nitrogen.(4)Soil enzyme activities were also significantly influenced.TPH most markedly enhanced catalase,urease,and sucrase activities,whereas acid phosphatase activity was highest in CK.[Conclusion]The TPH regime effectively coordinates tree growth,understory regeneration,and soil improvement in T.sinensis plantation.It is identified as a preferable management mode for establishing mixed uneven-aged multi-storey stands,improving stand quality,and supporting multifunctional sustainable management of T.sinensis plantations.关键词
香椿人工林/林分生长/干热河谷/间伐强度/土壤理化性质/土壤酶活性/人工林可持续经营Key words
Toona sinensis plantation/stand growth/dry-hot valleys/thinning intensity/soil physicochemical properties/soil enzyme activity/sustainable management of plantation分类
农业科技引用本文复制引用
黄玲,肖远登,蒙鑫,王智慧,韦铄星,陆秋洁,王燕兰,黄志超..间伐强度对干热河谷香椿人工林生长及土壤性状的影响[J].北京林业大学学报,2026,48(5):72-81,10.基金项目
广西重点研发计划(桂科 AB21220026),广西自筹经费林业科技项目(2023GXZCLK33),广西自筹经费林业科技项目(2025GXZCLK46). （桂科 AB21220026）
