林业科学2017，Vol.53Issue(1)：70-81,12.DOI:10.11707/j.1001-7488.20170109
冀北山地华北落叶松人工林与白桦混交改造模式对土壤动物群落的影响
Influence of the Mixed Modes of Larch and Birch on Soil Faunal Community in Mountain Area of Northern Hebei,China
摘要
Abstract
[Objective]The aim of this study was to investigate the effect of the different modes of mixing birch ( Betula platyphylla) into larch ( Larix principis-rupprechtii) plantations on soil faunal communities and functional groups in mountain area of northern Hebei, China,to provide theoretical basis for the mixed management and sustainable management of larch plantation.[Method]In May,July and September,2013,a pure larch forest (CK) and two mixed forests ( M1: young and even-aged larch stands mixed with birch; M2: striped,and uneven-aged stands of larch mixed with birch) were investigated. Hand pick and the Tullgren method were employed to extract soil fauna in these forests. In accordance with the feeding habits,soil fauna were classified into four functional groups,including saprophagous,predacity,phytophagous and Omnivorous. In addition,the differences in soilfaunal community structures, biodiversity, and functional group composition of these two mixed modes were analyzed.[Result]A total of 49106 individuals,belonging to 70 groups,were identified. Among them,2802 macro-fauna specimens were clustered into 50 groups with Formicidae,Curculionidae larvae and Nematocera larvae as the dominant groups; the others ( meso- and micro-fauna ) were classified into 33 groups with Acarina and Collembola as dominant ones. Our results showed that M2 had a significant effect on soil faunal communities after six years of mixed reconstruction,in that the group numbers and mean density of macro-fauna,as well as group numbers of meso-and micro-fauna in M2 were significantly higher than the these in CK and M1 ( P < 0. 05 ) ,respectively. Moreover,mixed modes,seasons and soil layers had significant influences on group numbers of soil fauna ( P <0. 05) but not on mean density. Shannon-Wiener index ( H) and Pielou evenness ( J) of soil fauna in M1 were significantly higher than those in CK. Remarkably,the density group index ( DG ) showed the most significant difference among the three forests ( P < 0. 001 ) . Of the four functional groups, Saprophagous was the most dominant group in the three forests. Group numbers of saprophagous,predacity and phytophagous in M2 were significantly higher than those in CK (P < 0. 05). The redundancy analysis (RDA) indicated that the distribution of soil fauna in litter layer was significantly correlated with organic carbon ( P = 0. 048 ) ,and the distribution soil fauna in soil layers was significantly correlated with not only soil organic carbon ( P = 0. 006 ) but also total nitrogen ( P = 0. 02 ) and soil bulk density ( P = 0. 044 ) .[Conclusion]Our results demonstrated that mixed management in larch plantation after six years enhanced soil faunal structure and diversity possibly through altering litter composition and number and soil physicochemical properties,especially in the uneven-aged striped mixed forests.关键词
土壤动物/森林混交模式/群落结构/功能群/落叶松人工林Key words
soil fauna/mixed modes/community structure/functional group/larch plantations分类
生物科学引用本文复制引用
高敏,马香丽,杨晋宇,黄选瑞,吴亚楠..冀北山地华北落叶松人工林与白桦混交改造模式对土壤动物群落的影响[J].林业科学,2017,53(1):70-81,12.基金项目
"十三五"国家重点研发计划项目专题"结构调控对人工林生产力形成的影响机制"(2016YFD060020303) （2016YFD060020303）
河北农业大学林学学科创新基金项目(LXXK2015-2). （LXXK2015-2）
