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Effects of nutrient removal by harvesting practices and fertiliser addition on end-of-rotation radiata pine wood quality
Forest Ecology and Management ( IF 3.7 ) Pub Date : 2021-05-04 , DOI: 10.1016/j.foreco.2021.119269
John R. Moore , Bernadette Nanayakkara , Russell B. McKinley , Loretta G. Garrett

With intensification of forest management, there has been increasing focus on the impacts of harvest residue removal on tree growth and long-term site productivity. The intensity of harvest removals, which has a direct impact on the available nutrient pools, influences tree growth and are also likely to impact the quality of wood formed. This study focused on the effects of harvesting residue removal practices (whole tree + forest floor, whole tree and stem only) at the end of the previous rotation and repeated fertiliser addition during the current rotation on selected wood quality attributes. Growth, wood density and standing tree acoustic velocity data were collected from almost 600 radiata pine (Pinus radiata D. Don) trees from long term site productivity trials across New Zealand (Woodhill, Tarawera and Berwick Forests). A sample of 116 trees were felled to obtain detailed wood quality measurements on logs and cross-sectional discs at different heights along the stem. There was little or no effect of different levels of harvesting removal on any of the measures of wood quality. However, repeated fertiliser addition throughout the course of the rotation (up to 3200 kg N ha−1 at Woodhill Forest) did result in adverse impacts on wood density, stiffness, branch size and heartwood content. The degree to which these affect returns to forest growers and end-product performance will depend on the market segment that logs are being sold into. It is recommended that nutritional strategies aimed at increasing forest productivity should incorporate studies to evaluate their potential adverse impacts on wood quality.



中文翻译:

采伐方式和添加肥料去除养分对旋转终辐射松木材质量的影响

随着森林管理的加强,人们越来越关注清除采伐残余物对树木生长和长期场地生产力的影响。采伐的强度直接影响可用的养分库,影响树木的生长,也可能影响所形成的木材的质量。这项研究的重点是在上一轮耕种结束时采伐残余物的清除方式(整棵树+林木,仅整棵树和所有茎)和当前轮作期间反复添加肥料对选定木材质量属性的影响。从近600幅辐射松(Pinus radiata)收集生长,木材密度和立木声速数据D. Don)来自新西兰(伍德希尔(Woodhill),塔拉威拉(Tarawera)和贝里克森林(Berwick Forests))长期现场生产力试验的树木。砍伐了116棵树木的样本,以获取沿茎部不同高度的原木和横截面圆盘上详细的木材质量测量结果。不同采伐水平对木材质量的任何影响几乎没有或没有影响。但是,在整个旋转过程中要重复添加肥料(最高3200 kg N ha -1在伍德希尔森林(Woodhill Forest)的确对木材密度,刚度,树枝大小和心材含量产生了不利影响。这些因素对森林种植者的回报和最终产品性能的影响程度将取决于原木的销售市场。建议旨在提高森林生产力的营养策略应纳入研究,以评估其对木材质量的潜在不利影响。

更新日期:2021-05-04
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