ABSTRACT Intensive silviculture is carried out within commercial timber plantations within South Africa during the re-establishment phase, however, there is limited information as to the rotation end benefits of this input. A trial investigating the rotation end (17.1 years) impact of slash management (Burn vs. No Burn), preparation of a planting position (Pit, Rip, Chopper roll+Pit and Chopper roll+Rip) and vegetation management (Weedy vs. Weedfree), and their interactions, was implemented on Pinus patula grown on a pulpwood regime in Mpumalanga, South Africa. Preparation of a planting position had a notable influence on vegetation biomass, where biomass was lowest within the Rip treatments. At 17.1 years, slash management did not significantly (P ≤ 0.05) influence growth, whereas the preparation of a planting position had a significant influence on basal area (BA) and volume (Vol), and vegetation management a significant influence on all the measured growth variates (diameter at breast height, BA and Vol). In addition, there was a significant interaction between the preparation of a planting position and vegetation management for BA and Vol. The greatest reduction in Vol was recorded for the mean of the treatments where only pitting was carried out (211.1 m3 ha−1) compared to the ripping treatments (27.1 m3 ha−1). These outcomes highlight the importance of vegetation management during re-establishment on rotation end P. patula productivity. In addition, these results support previous studies which found an interaction between the preparation of a planting position and vegetation management.

中文翻译：

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整地和植被管理对南非松树生长和轮作最终生产力的影响

摘要 在重建阶段，在南非的商业用材种植园内进行了集约造林，但是，关于这种投入的轮作最终收益的信息有限。一项调查林木管理（燃烧与不燃烧）、种植位置准备（坑、割、切刀滚+坑和切刀辊+割）和植被管理（杂草与无杂草）的轮作结束（17.1 年）影响的试验) 及其相互作用在南非姆普马兰加的纸浆木制度上种植的松树上实施。种植位置的准备对植被生物量有显着影响，其中在 Rip 处理中生物量最低。在 17.1 年时，斜线管理没有显着（P ≤ 0.05）影响增长，而种植位置的准备对基面积 (BA) 和体积 (Vol) 有显着影响，植被管理对所有测量的生长变量（胸高直径、BA 和 Vol）有显着影响。此外，BA和Vol的种植位置准备和植被管理之间存在显着的相互作用。与翻土处理 (27.1 m3 ha-1) 相比，仅进行点蚀的处理 (211.1 m3 ha-1) 的平均值记录了 Vol 的最大减少。这些结果突出了植被管理在轮作结束 P. patula 生产力重建过程中的重要性。此外，这些结果支持先前的研究，这些研究发现种植位置的准备和植被管理之间存在相互作用。