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首页> 外文期刊>International journal of soil science >Spatial Variability of Soil Organic Carbon in Oil Palm
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Spatial Variability of Soil Organic Carbon in Oil Palm

机译：油棕中土壤有机碳的空间变异性

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This study aimed at quantifying the spatial variability of SOC and estimating SOC concentration in oil palm. This study was carried out in a commercial oil palm plantation bearing 27 year old palms. A systematic design was employed for soil sampling at the 0-20 cm depth based on a cluster of 4 palms that included three operational areas Weeded Circle (WC), Frond Heap (FH) and Harvesting Path (HP). A total of 60 sampling clusters were established. SOC was analyzed using dry combustion method. All measurement points were geo-referenced by a differential Global Positioning System (dGPS). The SOC data were first explored using descriptive statistics, normality check and outlier detection. This followed by variography and interpolation techniques to quantify the spatial variability of SOC. Results showed that all three operational areas exhibited a definable spatial structure and were described by either spherical or exponential models. SOC from WC and HP showed moderate spatial dependence while that from FH showed a strong spatial dependence. The FH had a shorter effective range than other operational areas. Contour maps for WC, FH and HP clearly showed spatial clustering of SOC values. All three operational areas fulfilled the interpolation accuracy criteria. This study suggests that site-specific management could be considered as a strategy to increase SOC sequestration in oil palm.
机译：这项研究旨在量化SOC的空间变异性并估计油棕中的SOC浓度。这项研究是在拥有27年棕榈龄的商业油棕种植园中进行的。在一个由4个棕榈组成的群集的基础上，采用了一个系统化的设计来对0-20厘米深度的土壤进行采样，其中包括三个操作区域：杂草圈（WC），前堆（FH）和收获路径（HP）。共建立了60个抽样集群。使用干式燃烧法分析SOC。所有测量点均通过差分全球定位系统（dGPS）进行了地理参考。 SOC数据首先使用描述性统计，正态性检查和离群值检测进行探索。其次是变异函数和插值技术，以量化SOC的空间变异性。结果表明，所有三个操作区域均显示出可定义的空间结构，并通过球形或指数模型进行了描述。 WC和HP的SOC表现出中等的空间依赖性，而FH的SOC表现出强烈的空间依赖性。 FH的有效范围比其他作战领域短。 WC，FH和HP的轮廓图清楚地显示了SOC值的空间聚类。所有三个操作区域均满足插值精度标准。这项研究表明，特定地点的管理可以被视为增加油棕中SOC隔离的一种策略。

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