文献类型：期刊文献

英文题名：Understory vegetation diversity, soil properties and microbial community response to different thinning intensities in Cryptomeria japonica var. sinensis plantations

作者：Liu, Kai-Li[1,2,3] Chen, Bo-Yao[2] Zhang, Bin[1,3] Wang, Rui-Hui[1,3] Wang, Chun-Sheng[2]

第一作者：Liu, Kai-Li

通信作者：Wang, RH[1];Wang, CS[2];Wang, RH[3]

机构：[1]Cent South Univ Forestry & Technol, Coll Forestry, Changsha, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou, Peoples R China;[3]Natl Long term Sci Res Base Cent & Subtrop Forestr, Changsha, Peoples R China

年份：2023

卷号：14

外文期刊名：FRONTIERS IN MICROBIOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000949075600001)】；

基金：This work was financially supported by Hunan Provincial Innovation Foundation For Postgraduate (CX20200706) and Scientific Innovation Fund for Postgraduates of Central South University of Forestry and Technology (CX20201005).

语种：英文

外文关键词：soil microbial community composition; microbial function; thinning; soil properties; understory vegetation

摘要：IntroductionSoil microorganisms are the key factors in elucidating the effects of thinning on tree growth performance, but the effects of vegetation and soil on the species composition and function of soil microorganisms after thinning are still not well elaborated. MethodsThe effects of thinning on understory vegetation diversity, soil physicochemical properties and soil microbial community composition were investigated in a thinning trial plantation of Cryptomeria japonica var. sinensis, including four thinning intensities (control: 0%, LIT: 20%, MIT: 30% and HIT: 40%), and the relationships of the microbial community structure with the understory vegetation diversity and soil properties were assessed. ResultsThe results showed that thinning had a greater effect on the diversity of the shrub layer than the herb layer. The soil bulk density and the contents of soil organic matter, total potassium and nitrogen increased with increasing thinning intensities. The Shannon and Chao indices of soil bacteria and fungi were significantly lower in the LIT, MIT and HIT treatments than in the control. Thinning can significantly increase the abundance of Proteobacteria and Actinobacteria, and higher thinning intensities led to a higher relative abundance of Ascomycota and a lower relative abundance of Basidiomycota, Rozellomycota, and Mortierellomycota. Redundancy analysis indicated that soil physicochemical properties rather than understory vegetation diversity were the main drivers of microbial communities, and fungi were more sensitive to soil properties than bacteria. Functional prediction showed that thinning significantly reduced the potential risk of human diseases and plant pathogens, and the nitrogen fixation capacity of bacteria was the highest in the HIT treatment. Thinning significantly increased the relative abundance of cellulolysis and soil saprotrophs in bacteria and fungi. ConclusionThe findings provide important insights into the effects of thinning on C. japonica var. sinensis plantation ecosystems, which is essential for developing thinning strategies to promote their ecological and economic benefits.