桉树—红锥混交林林分生长和土壤肥力分析
Analysis of Stand Growth and Soil Fertility in Mixed Eucalyptus-Castanopsis hystrix Plantations
马安琪 1邓海燕 2朱琪 1申琳琳 3丁晓纲 4莫晓勇3
作者信息
- 1. 华南农业大学林学与风景园林学院,广东 广州 510642;广东省林业科学研究院,广东 广州 510520
- 2. 广东省林业调查规划院,广东 广州 510520
- 3. 华南农业大学林学与风景园林学院,广东 广州 510642
- 4. 广东省林业科学研究院,广东 广州 510520
- 折叠
摘要
为探究不同比例桉树Eucalyptus—红锥Castanopsis hystrix混交林林分生长和林地质量间伐后的变化,以不同混交比例桉树—红锥混交林和桉树纯林为研究对象,采用对比分析和方差分析方法探讨间伐前和间伐后不同比例桉树—红锥混交林林分生长和林地肥力变化.结果表明:(1)桉树—红锥 1∶1 混交林间伐50%强度桉树后能显著促进桉树—红锥混交林林分中桉树胸径和单株材积生长(2)桉树-红锥1∶1、3∶1 混交林间伐50%强度桉树后能增加桉树和红锥蓄积,桉树—红锥5∶1、3∶3 混交林间伐 50%强度桉树后能增加红锥蓄积;(3)桉树—红锥1∶1 混交林间伐 50%强度桉树后土壤毛管孔隙度和pH明显降低,桉树—红锥3∶1 混交林间伐50%强度桉树后碱解氮含量降低最明显,有效磷含量增幅最大,桉树—红锥5∶1 混交林间伐50%强度桉树后有机碳和速效钾含量增幅最高,桉树—红锥 3∶3 混交林间伐50%强度桉树后土壤容重增幅最大,有机碳含量略有增加,有效磷含量明显降低.混交比例和间伐是影响林木生长的主要经营模式,根据造林目的和营林需求综合确定经营模式是精准提升桉树—红锥混交林经济和生态效益的关键.
Abstract
In order to investigate the changes in the stand growth and the stand quality on different mixed ratios of Eucalyptus-Castanopsis hystrix mixed plantations after thinning,this paper took different mixed ratios of mixed Eucalyptus-C.hystrix plantations and pure Eucalyptus plantations as the research objects and used the methods of comparison and variance analysis to investigate the changes in the growth of different mixed ratios of mixed Eucalyptus-C.hystrix plantations and the soil fertility of the plantations and before and after the thinning.The results showed that:(1)M1 pattern could significantly promote the growth on diameter at breast height and individual volume of Eucalyptus in Eucalyptus-C.hystrix mixed plantations followed by M4 pattern;(2)M1 and M2 patterns could increase the volume per unit area of both Eucalyptus and C.hystrix,and M3 and M4 pat-terns could only increase C.hystrix volume per unit area;(3)After thinning,the capillary porosity and pH of the soil in M1 pattern decreased the most,the alkali-hydrolyzed nitrogen content decreased the most and the a-vailable phosphorus content increased the most in M2 pattern,the organic carbon and available potassium con-tents increased the most,and the alkali-hydrolyzed nitrogen content decreased the least in M3 pattern,in M4 pattern the soil bulk weight increased the most,the organic carbon content increased the least,and the available phosphorus content decreased the most.Both mixed ratio and thinning are the main management modes affecting the growth of plantation trees.Comprehensively determining the management modes according to the purpose of afforestation and the needs of plantation management is the key to accurately improving the economic and ecolog-ical benefits of Eucalyptus-C.hystrix mixed plantation.
关键词
经营模式/抚育间伐/林分生长/土壤肥力Key words
management mode/nursery thinning/stand growth/soil fertility引用本文复制引用
基金项目
国家重点研发计划项目(2016YFD0600505)
广东省科技创新项目(2024KJCX018)
出版年
2024
NETL
NSTL
万方数据