摘要
探讨择伐强度对杉阔混交人工林生长及林下植被物种多样性的影响,以期为促进林分生长和提高林下植被物种多样性提供科学依据。以闽北杉阔混交人工林为对象,2011年8月实施不同强度择伐,择伐强度(蓄积量强度)分别为中度择伐(medium intensity, MI)34.6%、强度择伐(high intensity, HI)48.6%和极强度择伐(extra-high intensity, EHI)67.6%,并设未采伐(non-cutting,NC)为对照;基于不同择伐强度后当年及3、5、10 a跟踪调查数据,分析择伐强度对林分生长和植物物种多样性的影响。结果表明,林分平均胸径年增长量由大到小为MI、HI、EHI、NC,MI比NC提高17.2%,各处理间无显著差异(P>0.05);林分平均树高年增长量略低于NC,各处理间无显著差异(P>0.05);林分单株胸高断面积年增长量由大到小为MI、EHI、HI、NC,MI比NC提高了84.8%,单株蓄积年增长量由大到小为MI、EHI、HI、NC,MI比NC提高了82.6%,MI、HI和EHI都显著高于NC(P<0.05);灌木层物种丰富度、多样性和均匀度由大到小均为EHI、HI、MI、NC,EHI显著高于NC(P<0.05),分别是NC的1.76倍、1.43倍和1.13倍;草本层物种丰富度和多样性由大到小均为EHI、HI、MI、NC,EHI显著高于NC(P<0.05),分别是NC的2.17倍和1.92倍,各处理间草本层物种均匀度无显著差异(P>0.05)。由此得出,短期内,择伐有效促进了杉阔混交人工林林分生长和提高了林下灌木层和草本层植被物种多样性,其中中度择伐最有利于促进林分生长,极强度择伐最有利于促进林下灌草物种多样性的提高。
The objective of this study was to explore the impact of cutting intensity on forest growth and plant diversity in mixed plantation of Cunninghamia lanceolata and broadleaved trees and provide a scientific basis for improving forest quality and species diversity. Taking the mixed plantation of Cunninghamia lanceolata and broadleaved trees in northern Fujian Province in China as the research object, different cutting intensities were treated as experimental conditions in August 2011. Selected cutting intensity was medium intensity(MI) 34.6%, high intensity(HI) 48.6%, extra-high intensity(EHI) 67.6%, respectively, and non-cutting(NC) was used as the control. Based on track survey data in the year after cutting, 3, 5 and 10 years after cutting, the impact of cutting intensity on standing growth and plant diversity of the forest were analyzed. The results showed the average annual growth of mean diameter at breast height(DBH) from large to small was MI, HI, EHI, NC, and the parameter MI was 17. 2% higher than NC. There were no significant differences among the various cutting intensity(P>0. 05). The average annual growth of the tree height of the stand was slightly lower than that of NC and there were no significant differences(P>0. 05). The annual growth of the sectional area at breast height of the single plant from large to small was MI, EHI, HI, NC, and the parameter in MI was 84. 8% higher than NC. The annual growth of the stock volume of single plant from large to small was MI, EHI, HI, NC, and the parameter in MI was 82. 6% high-er than NC. MI, HI and EHI were significantly higher than NC. The species richness, diversity and evenness of the shrub layer from large to small were EHI, HI, MI, NC, and EHI was significantly higher than NC(P>0. 05), which were 1. 76 times, 1. 43 times and 1. 13 times of NC. The species richness and diversity of herbal layer from large to small were EHI, HI, MI, NC, and EHI was signifi-cantly higher than NC(P<0. 05), which were 2. 17 times and 1. 92 times of NC. However, there was no
作者
周成军
巫志龙
周新年
曾浩
曾灵秀
ZHOU Chengjun;WU Zhilong;ZHOU Xinnian;ZENG Hao;ZENG Lingxiu(College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;National Forestry and Grassland Administration Engineering Research Center of Chinese Fir,Fuzhou 350002,China)
出处
《森林工程》
北大核心
2023年第1期46-53,62,共9页
Forest Engineering
基金
国家自然科学基金项目(30972359)
国家“工程索道”精品资源共享课项目(111zj0588)
福建省林业厅科学基金资助项目(K851310301)
福建省教育厅资助项目(JAT170172)
福建农林大学科技创新专项基金资助项目(CXZX2016036)
福建农林大学部级创新平台资助(ptjh13002)
福建农林大学省级创新平台资助(ptjh16006)。
关键词
择伐强度
林分生长
物种多样性
杉阔混交人工林
Cutting intensity
stand growth
species diversity
mixed plantation of Cunninghamia lanceolata and broadleaved trees
