摘要
为探索适合长汀水土流失区马尾松人工林改培技术模式,开展马尾松人工林不同间伐和套种木荷、枫香等阔叶树改培试验,分析不同间伐、套种的林分生长效应.结果表明:不同间伐强度并套种阔叶树的改培技术措施对水土流失区的马尾松和林下阔叶树生长的影响存在差异,以B处理的改培效果最佳,其马尾松保留木的胸径、树高、材积4a净生长量分别达3.38 cm、2.79 m、0.0331 m3,不同程度高于其他处理,且其林下不同阔叶树的生长状况最优,套种 4a林分平均保存率、树高、地径和冠幅分别达85.73%～92.15%、1.42～1.73 m、1.92～2.31 cm和 0.70～0.76 m.间伐每 667m2 保留马尾松 30 株+套种木荷、枫香等阔叶树的改培技术措施能有效促进马尾松和林下阔叶树的生长.
Abstract
To explore suitable techniques for the transformation of Pinus massoniana plantations in the Changting soil erosion area,experi-ments were conducted on different thinning and interplanting practices with broadleaved trees such as Schima superba and Liquidambar formosana.The growth effects of different thinning and interplanting treatments analyzed on the stand.The results showed that the effects of different thinning intensities and interplanting of broadleaved trees on the growth of P.massoniana and understory broadleaved trees in the soil erosion area varied.The best cultivation effect was observed in treatment B,where the Diameter at Breast Height(DBH),height,and net volume growth of the retained P.massoniana over four years reached 3.38 cm,2.79 m,and 0.0331 m3,respectively,which were higher than those of other treatments.Additionally,the growth conditions of different broadleaved trees under this treatment were optimal,with an average survival rate,height,ground diameter,and crown width of the four-year-old stand reaching 85.73%to 92.15%,1.42 to 1.73 m,1.92 to 2.31 cm,and 0.70 to 0.76 m,respectively.The transformation technique of retaining 30 P.massoniana trees per acre and inter-planting with broadleaved trees such as S.superba and L.formosana can effectively promote the growth of both P.massoniana and under-story broadleaved trees.
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