Richard D. Bowden, Myrna J. Simpson, Nathalie Paz Saucedo, Katherine Brozell, Jackie DiGiacomo, Kate Lajtha
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引用次数: 0
摘要
管理者越来越多地寻求增加森林土壤碳,但对土壤有机质(SOM)来源和稳定性的长期控制却知之甚少。我们在落叶林中进行了一项为期 30 年的沉积物输入/清除处理实验,以评估根和叶沉积物对 SOM 的重要性。通过排除根和叶(枯落物)或将枯落物输入量增加一倍来评估输入量。在矿质土壤中,SOM% 仅在 0-10 厘米处存在差异(p = 0.11),无枯落物和无根处理的浓度分别比对照组低 26% 和 9%。停止丢弃物对 SOM 的影响比停止根系输入更大,但根系丢弃物的输入可能有助于稳定 SOM。双倍垃圾增加了矿质 SOM。
Litter and root sources of soil organic matter in a temperate forest: Thirty years in the DIRT
Managers increasingly seek to increase forest soil carbon but long-term controls on soil organic matter (SOM) sources and stability are weakly understood. We used a 30-year detrital input/removal treatment experiment in a deciduous forest to evaluate the importance of root and leaf litter to SOM. Inputs were assessed by excluding roots and leaves (litter) or by doubling litter inputs. In mineral soil, %SOM differed only at 0–10 cm (p = 0.11), with concentrations in the no litter and no roots treatments of 26% and 9%, respectively, lower than the controls. Cessation of litter inputs had a stronger effect on SOM than cessation of root inputs, but root litter inputs may contribute stable SOM. Doubled litter increased mineral SOM.