闽北7种人工林林地土壤肥力的研究

Study on Soil Fertility of 7 Kinds of Plantations in Northern Fujian Province

闽北林区是福建省最为主要的林区,为探寻适宜的人工林造林方式,以建瓯南雅杉溪村18年生的杉木纯林、马尾松纯林、木荷纯林、杉木×马尾松混交林、杉木×木荷混交林、马尾松×木荷混交林、杉木×马尾松×木荷混交林为研究对象,对这7种人工林林地土壤中的水解氮、有效磷及速效钾的含量进行了测定和比较分析。结果表明,纯林中水解氮含量最高的是马尾松纯林,有效磷最高的是杉木纯林,速效钾最高的是木荷纯林,除杉木×马尾松混交林的有效磷含量低于杉木纯林外,采取混交方式造林的人工林林地土壤中水解氮、有效磷和速效钾均高于单一的纯林。在杉木、马尾松和木荷两两混交的混交林中,杉木×马尾松混交林土壤水解氮、有效磷和速效钾的含量比杉木×木荷混交林和马尾松×木荷混交林低。两两混交的混交林的水解氮、有效磷和速效钾的含量比杉木×马尾松×木荷混交林的低。

Forests in northern Fujian were the most major forest area in Fujian Province, in order to explore the suitable way of plantation. 18-year-old Cunninghamia plantations, P/nu plantations, Schima superba plantations, mixed C. /anceo/ataxP. massoniana plantations, mixed C. lanceolataxS, superba plantations, mixed P. massonianaxS, superba plantations, mixed C. lanceolataxP, massonianaxS, superba plantations in Jian＇ou Nanya Sequoia Village were made as study objects. The content of hydrolysis N, available P, available K in soil in these seven kinds of artificial forests were measured and compared. The results showed that the highest nitrogen content of pure forest hydrolysis is pure P. massoniana forest, phosphorus is the highest in fir plantations, potassium is the highest in S. superba plantations, excepted phosphorus content of C. lanceolataxP, massoniana mixed forests was less than pure plantations, the hydrolyzed nitrogen, phosphorus and potassium in soil in mixed afforestation plantations were higher than a single pure forest. In the mixed forests of C. lanceolataxP, massoniaaa, C. lanceolataxS, superba and P. massonianaxS, superba, the content of hydrolysis N, available P, avai]abxe K of C. lanceolataxP, massoniana was less than the mixed forests of C. lanceolataxS, superba, P. massonianaxS, superba. Each two mixed forests, the content of hydrolysis N, available P, available K was less than mixed forests of C. lanceolataxP, massonianaxS, superba.