杉木林套种闽粤栲林分特性及其涵养水源功能

Stand Characteristics and Water Conservation Function of Cunninghamia lanceolata Plantation Mixed with Castanopsis fissa

为培育杉木大径材,营建杉木与闽粤栲异龄复层林,探索杉木林内套种闽粤栲的林分特性及其涵养水源功能,以杉木林套种闽粤栲为研究对象,以杉木纯林、闽粤栲纯林为对照。对套种林的林分结构、生物量、林木生长、土壤物理化学性质等展开分析测定。结果表明,套种林内林木生长良好,生长量得到提高,林分的土壤肥力得以改善,林分生物多样性及涵养水源功能得到加强,杉木林间伐最佳保留密度是600株·hm^(-2)。得出杉木林下套种闽粤栲的特性及其高效培育技术,为培育杉木大径材及营建针阔异龄复层林提供科学依据。

The objectives of this study were to cultivate the timber of Cunningharnia lanceolata with large diameter,to establish uneven-aged and multi-storied plantations of C. lanceolata mixed with Castanopsis fissa ,and to explore the stand characteristics and soil and water conservation capacity of the mixed planta- tions. Plantations of C. lanceolata mixed with C. fissa established in 2006 were used as research objectives. The pure C. lanceolata and C. fissa plantations were used as controls. The stand structure,biomass,tree growth,soil physicochemical properties were measured and analyzed. Compared with the controls, the mixed plantations grew well, manifested by the increase of growth. Soil fertility in the mixed plantation was improved. Meanwhile,biodiversity and water conservation function was enhanced. The optimal density of C. lanceolata after retention was 600 stems/hm2. The characteristics of the C. lanceolata plantation mixed with C. fissa and effective cultivation techniques for cultivating large diameter timber of C. lanceolata were sumarized to guide the construction of coniferous and broad-leaved mixed plantation.