Successful spruce regenerations – impact of site preparation and the use of variables from digital elevation models in decision-making?

IF 1.8 3区 农林科学 Q2 FORESTRY
P. Nordin, E. Olofsson, K. Hjelm
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引用次数: 0

Abstract

ABSTRACT Various site preparation methods are used in Swedish forestry. However, some methods can lead to unnecessary disturbance, which could be avoided by using variables from digital elevation models in management decisions. The current study aimed to investigate how different site preparation methods, and their intensities, affect Norway spruce (Picea abies (L.) Karst.) regeneration. Additional aims were to clarify how these methods affect soil disturbance and vegetation development, along with how variables from digital elevation models could be used in silvicultural decision-making. Experimental sites were established in southern Sweden to assess five different site preparation treatments with different planting densities: (1) conventional disc trenching 2500 seedlings/ha (DT2500); (2) low intensity disc trenching 1250 seedlings/ha (LDT1250); (3) low intensity disc trenching 2500 seedlings/ha (LDT2500); (4) low-intensity patch-wise 1250 seedlings/ha (PW1250); and (5) patch-wise 2500 seedlings/ha (PW2500). Site preparation intensity had no effect on seedling growth and, survival or vegetation development; the tested treatments differed in terms of soil disturbance. Planting spot properties and weather conditions influenced the seedling performance. DTW and slope could not substantially explain either seedling growth or survival. The results indicate that the choice of site preparation method should consider flexibility when planting while adapting the level of disturbance accordingly.
成功的云杉再生——场地准备的影响和决策中数字高程模型变量的使用?
瑞典林业采用了多种整地方法。然而,一些方法可能会导致不必要的干扰,这可以通过在管理决策中使用数字高程模型中的变量来避免。目前的研究旨在调查不同的场地准备方法及其强度如何影响挪威云杉(Picea abies(L.)Karst.)再生其他目的是阐明这些方法如何影响土壤扰动和植被发育,以及数字高程模型中的变量如何用于造林决策。在瑞典南部建立了试验点,以评估不同种植密度的五种不同整地处理:(1)常规圆盘挖沟2500株/公顷(DT2500);(2) 低强度圆盘挖沟1250株/公顷(LDT1250);(3) 低强度圆盘挖沟2500株/公顷(LDT2500);(4) 低强度逐块种植1250株幼苗/公顷(PW1250);和(5)逐块种植2500株幼苗/公顷(PW2500)。整地强度对幼苗生长、存活或植被发育没有影响;试验处理的土壤扰动程度不同。种植点特性和天气条件影响幼苗的生长性能。DTW和坡度不能充分解释幼苗的生长或存活。结果表明,整地方法的选择应考虑种植时的灵活性,同时相应地适应干扰水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.00
自引率
5.60%
发文量
26
审稿时长
3.3 months
期刊介绍: The Scandinavian Journal of Forest Research is a leading international research journal with a focus on forests and forestry in boreal and temperate regions worldwide.
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