Investigation on the Growth Status and Natural Renewal of North China larch Shelterbelt in Shuozhou City
ObjectiveTo investigate the growth and soil fertility of larch shelterbelt in Shuozhou,and analyze the natural renewal of larch.Methods In the study site,all stands were naturally updated.According to different forest ages,they were divided into 10～20a(Z1),20～30a(Z2)and 30～40a(Z3)in each group(50m 50m)to analyze the growth conditions of seedlings of different trees.Results;①Seedling growth:The seedlings grow well between different forest ages of Huabei larch shelterbelt,Miao height and ground diameter are the best by Z2,Presented as Z2>Z1>Z3,A significant difference between the groups(P<0.05),Specifically,Z2 larch strains were lower than Z1 and Z3(P<0.05),And in which Z3>Z1(P<0.05);②Soil fertility:there was no difference in pH values of 3 groups(P>0.05),The content of organic matter,total nitrogen,total phosphorus and quick-acting potassium in Z2 soil was significantly higher than that of Z1>Z3(P<0.05);③Natural renewal:the natural regeneration of Z2 larch seedlings is significantly better than Z1 and Z3,This indicates that forest age,density and soil fertility directly affect the natural regeneration of understory seedlings.Conclu-sion At 20～30a forest age,the seedling density is good,the soil fertility is good,and the natural renewal dynamics of the forest is good.
North China larchgrowth statusnatural renewalsoil fertility
万方数据
维普
