An assessment of oil palm plantation aboveground biomass stocks on tropical peat using destructive and non-destructive methods
An assessment of oil palm plantation aboveground biomass stocks on tropical peat using destructive and non-destructive methods
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DOI：
10.1038/s41598-020-58982-9
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发表时间：
2020-02-10
影响因子：
4.6
通讯作者：
Hill, Timothy Charles
中科院分区：
文献类型：
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作者：
Lewis, Kennedy;Rumpang, Elisa;Hill, Timothy Charles
最近油棕（OP，Elaeis guineensis）种植园向热带森林泥炭地的扩张导致了生态系统碳排放。然而，估计生物量变化产生的净碳通量需要准确估计泥炭上有机磷的地上生物量 (AGB) 积累率。我们利用对另外 902 棵棕榈树进行的非破坏性调查支持的破坏性收成，对马来西亚排水泥炭种植园 3 至 12 年后的 AGB 储量进行了量化。开发了棕榈 (R-2=0.92) 和叶状生物量的泥炭特定异速生长方程，并与矿质土壤上现有的 OP 异速生长方程进行对比。异速生长用于将 AGB 估计值提升至种植园区块级别。在种植后的前12年里，泥炭地上生物量库每年积累了大约6.39 +/- 1.12Mg ha(-1)，当模拟“完美”种植园时，增加到大约7.99 +/- 0.95Mg ha(-1) yr(-1)。由于棕榈倾斜度和死亡率的变化，在成熟类中观察到高棕榈间和块间 AGB 变异性。对所定义的异速生长的验证以及对泥炭替代种植园和年龄级别的无损清单的扩展将进一步加强我们对泥炭 OP AGB 积累率的理解。
The recent expansion of oil palm (OP, Elaeis guineensis) plantations into tropical forest peatlands has resulted in ecosystem carbon emissions. However, estimates of net carbon flux from biomass changes require accurate estimates of the above ground biomass (AGB) accumulation rate of OP on peat. We quantify the AGB stocks of an OP plantation on drained peat in Malaysia from 3 to 12 years after planting using destructive harvests supported by non-destructive surveys of a further 902 palms. Peat specific allometric equations for palm (R-2=0.92) and frond biomass are developed and contrasted to existing allometries for OP on mineral soils. Allometries are used to upscale AGB estimates to the plantation block-level. Aboveground biomass stocks on peat accumulated at similar to 6.39 +/- 1.12Mg ha(-1) per year in the first 12 years after planting, increasing to similar to 7.99 +/- 0.95Mg ha(-1) yr(-1) when a 'perfect' plantation was modelled. High inter-palm and inter-block AGB variability was observed in mature classes as a result of variations in palm leaning and mortality. Validation of the allometries defined and expansion of non-destructive inventories across alternative plantations and age classes on peat would further strengthen our understanding of peat OP AGB accumulation rates.