不同建群种下多穗柯作为伴生树种的适应性分析

The adaptability analysis of Lithocarpus polystachyus as associated species under different constructive species

以野生多穗柯为对象进行每木检尺,研究以木荷、苦槠、杉木为建群种,多穗柯作为伴生树种的生长状况,结果表明:多穗柯常作为伴生树种出现,其适应性因建群种的不同而有所差异,不同建群种对多穗柯的树高、胸径、枝下高、冠幅、材积生长具有显著性影响,在杉木下种植多穗柯,其树高生长量最大(7.40m),苦槠次之(6.15m),木荷最小(5.51m);3类建群种与多穗柯胸径、冠幅生长具有相关性,在杉木下种植表现最佳,木荷次之,在苦槠下种植表现最差;然而,苦槠建群种下的多穗柯枝下高最大(2.76m),与木荷、苦槠下种植的多穗柯相比,杉木下的多穗柯具有更多的材积量,比前两者分别增加了35.33%、31.65%。因此,在人工林种植中,应选择多穗柯与杉木混交,以构造人工林近自然经营模式。

Lithocarpus polystachyus was the study object in this article. The influences of constructive species were analyzed： Schima superba, Castanopsis sclerophylla and Cunning hamia lanceolata on growth conditions of Lithocarpus polystachyus. The results showed that Lithocarpus polystachyus usually appeared as associated species and its adaptability de pended on different constructive species. There were significant influences of different con structive species on tree height, diameter of under branch, height crown width and tree vol ume of Lithocarpus polystachyus. The tree height of Lithocarpus polystachyus under the constructive species of Cunninghamia lanceolata was the best（7. 40 m）, followed by the constructive species of Castanopsis sclerophylla （6.15 m） and then the Schima superba （5. 51 m）. The effects of the three types of constructive specieson diameter and crown width of Lithocarpus polystachyus were correlative, which grow best in the Cunninghamia lanceola ta, followed by Schima superba and then the Castanopsis sclerophylla. However, the per formance on under branch height of Lithocarpus polystachyus under the Castanopsis sclero phylla was the best（2.76 m）. Compared with Schima superba and Castanopsis sclerophylla , Lithocarpus polystachyus under Cunninghamia lanceolata had more tree volume, in creased 35.33% and 31. 65%, respectively. Therefore, in plantation of man made forest, Lithocarpus polystachyus mixed with Cunninghamia lanceolata is advised to be built as near natural management modes.