Ground vegetation,forest floor and mineral topsoil in a clear-cutting and reforested Scots pine stands of different ages:a case study  

作　　者：DovilėGustienė Iveta Varnagirytė-Kabašinskienė Vidas Stakėnas 

机构地区：[1]Lithuanian Research Centre for Agriculture and Forestry,Liepųstr.1,Girionys,53101 Kaunas District,Lithuania [2]Kaunas Forestry and Environmental Engineering University of Applied Sciences,Liepųstr.1,Girionys,53101 Kaunas District,Lithuania

出　　处：《Journal of Forestry Research》2022年第4期1247-1257,共11页林业研究（英文版）

基　　金：funded by Ph.D.project“Peculiarities of reforestation in clear cuttings of Scots pine stands on nutrient poor sites”(2017–2023),implemented by the Lithuanian Research Centre for Agriculture and Forestry。

摘　　要：Scots pine(Pinus sylvestris L.)is a dominant tree species on nutrient-poor sandy soils in the Baltic region’s hemiboreal forests.A final clear-cut in commercial stands is a common practice.However,the maintenance of relatively stable vegetation indices and ecological processes throughout the rotation promote new scientific and social debates.Overall,clear-cuttings disturb forest functions for a certain period,i.e.,phytocenoses with forest-based species composition,biodiversity,and vegetation cover.Soil organic carbon(SOC)and nutrients can also be affected.As key indices,ground vegetation,SOC and main nutrients in the forest floor and in 40-cm topsoil layer were analysed in the clear-cuttings(not reforested)and in reforested 10-,30-,and 101-year-old Scots pine stands in 2020.The results show an increase in species richness at the beginning of stand formation up to 30 years after clear-cutting;species typical of a mature forest occurred relatively quickly post-harvest.The mean mass of forest floor vegetation was negatively related to the richness of ground vegetation species.Forest floor p H consequently decreased with stand age.Higher SOC levels were in the mature stand.In the mineral topsoil layers,total SOC and total nitrogen were in the upper 10-cm layer in the 30-year-old stand.A post-harvest peak in mineral N concentration was observed and other nutrients,especially mobile PO,KO,Caand Mg,increased the clear-cuttings and in the 10-year-old stand compared to the mature stand.

关 键 词：Pinus sylvestris Species cover Richness Soil organic carbon Soil nutrients Mature stand 

分 类 号：S718.5[农业科学—林学]