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Carbon balance for biosolids use in commercial Douglas Fir plantations in the Pacific Northwest

机译：生物糖的碳平衡在太平洋西北地区商业道格拉斯杉木种植园使用

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摘要

Municipal biosolids are commonly used to fertilize Douglas fir (Pseudotsuga menziesii) plantations in the Pacific Northwest. An intensive soil sampling was conducted to quantify the effects of long-term biosolids application on soil carbon, nitrogen and bulk density for forest soils. This information was used to calculate a carbon balance for biosolids use in commercial tree plantations. Paired control and treated sites on two soil series (Klaus and Tokul) were included with samples collected to a 30 cm depth. A significant decrease in bulk density for two depths, but no changes in total C or N were observed in the Klaus soil. In the Tokul soil, biosolids fertilization increased C storage (total C * bulk density) for three of the four measured depths, resulting in an increase in total C from 112.8 Mg C ha~(-1) to 172 Mg C ha~(-1) for the 0-30 cm depth. A comparable increase in N was observed, with significant increases in N storage for all measured depths. The C balance considered fuel use associated with transport and application as costs. The fertilizer (N and P) content of the biosolids and changes in soil C were considered as credits. The balance showed net sequestration for both soil series. Carbon benefits for the Klaus soil totaled -0.2 Mg CO_2 per Mg biosolids. Benefits in the Tokul soil totaled -5.15 Mg CO_2 per Mg biosolids. Based on diameter at breast height (DBH) biosolids use also resulted in increased tree growth for both soil series. However, differences in stand age and stocking rate complicated interpretation of these results.
机译：市政生物溶胶通常用于在太平洋西北地区施肥道格拉斯冷杉（Pseudotsuga Menziesii）种植园。进行了密集的土壤采样，以量化长期生物溶解在森林土壤土壤碳，氮和散装密度对土壤碳，氮气和散装密度的影响。该信息用于计算生物溶解体在商业树种植园中的碳平衡。将样品收集到30厘米深度的样品中包含两种土壤系列（Klaus和Tokul）上的配对控制和治疗部位。两个深度的堆积密度显着降低，但在克劳斯土壤中没有观察到总C或N的变化。在Tokul土壤中，生物溶胶施肥增加了C储存（总C *堆积密度），对于四个测量深度中的三个，导致总C的112.8mg C ha〜（-1）〜172mg c ha〜（ - 1）对于0-30厘米深度。观察到N的相当增加，对于所有测量深度，N储存的显着增加。 C平衡认为与运输和应用相关的燃料使用作为成本。生物溶胶和土壤C的变化的肥料（N和P）含量被认为是学分。平衡显示了土壤系列的净封存。 Klaus土壤的碳益率总累量为-0.2mg Co_2，每镁生物溶胶。 Tokul土壤中的益处总计-5.15mg CO_2每镁生物溶胶。基于乳房高度的直径（DBH）生物溶胶也使用土壤系列的树脂增长增加。然而，差异的差异和库存率复杂解释这些结果。

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  • 来源
    《Journal of Environmental Management》 |2021年第1期|113115.1-113115.9|共9页
  • 作者

    Emma Leonard; Jyoti Bodas; Sally Brown; Ben Axt;

  • 作者单位

    School of Environment and Forest Sciences University of Washington Seattle WA USA;

    School of Environment and Forest Sciences University of Washington Seattle WA USA;

    School of Environment and Forest Sciences University of Washington Seattle WA USA;

    Resource Recovery Division King County WA USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Municipal biosolids; Commercial forestry; Soil carbon storage;

    机译：城市生物溶胶;商业林业;土壤碳储存;

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