Fine root biomass and turnover in southern taiga estimated by root inclusion nets
Fine root biomass and turnover in southern taiga estimated by root inclusion nets
复制标题
DOI：
10.1007/s11104-009-0271-z
复制
发表时间：
2010-06-01
期刊：
影响因子：
4.9
通讯作者：
Godbold, Douglas L.
中科院分区：
文献类型：
--
作者：
Lukac, Martin;Godbold, Douglas L.
细根在森林碳素、养分和水分循环中起着重要作用。细根的周转构成了土壤的主要碳输入。细根周转率的估计是困难的，劳动密集型的，而且经常被土壤干扰造成的人工影响所复杂化。在这项工作中，另一种方法是使用安装在未受干扰的土壤剖面中的包含网来测量细根产量，并与生长芯法进行了比较。在俄罗斯中央森林国家生物圈保护区土壤条件和树种组成不同的三个南部泰加样地，用两种方法估计的细根产量没有差异。以年生产量与现存量表示，挪威云杉细根周转率在0.10~0.24年(-1)之间。包含网技术适用于细根产量的田间评价。由于土壤剖面不受干扰，其重复率非常高，因此与生长中岩心法相比有几个优点。
Fine roots play an important part in forest carbon, nutrient and water cycles. The turnover of fine roots constitutes a major carbon input to soils. Estimation of fine root turnover is difficult, labour intensive and is often compounded by artefacts created by soil disturbance. In this work, an alternative approach of using inclusion nets installed in an undisturbed soil profile was used to measure fine root production and was compared to the in-growth core method. There was no difference between fine root production estimated by the two methods in three southern taiga sites with contrasting soil conditions and tree species compositions in the Central Forest State Biosphere Reserve, Russia. Expressed as annual production over standing biomass, Norway spruce fine root turnover was in the region of 0.10 to 0.24 y(-1). The inclusion net technique is suitable for field based assessment of fine root production. There are several advantages over the in-growth core method, due to non-disturbance of the soil profile and its potential for very high rate of replication.