Soil Physicochemical Properties Data in Bornean Tropical Heath Kerangas Forests Invaded by Acacia mangium

This dataset contains collected data from a research project on the impact of the invasive alien tree species<em> Acacia mangium</em> Willd. on nutrient-poor sandy soils in tropical heath Kerangas forests, an increasingly threatened lowland forest in Brunei Darussalam, Borneo. Soil samples were collected in 2015 from three selected habitats: intact Kerangas forest, <em>Acacia</em>-invaded Kerangas forest, and <em>Acacia mangium</em> plantation. In each plot, eight soil cores were collected in the topsoil (0 - 15 cm) and subsoil (30 - 50 cm) layers, and soil parameters such as gravimetric water, organic matter content, texture, nutrient concentrations of nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg) and calcium (Ca), exchangeable Mg, Ca, K, available P, and pH were documented. Sampling and analysis were performed according to standard protocols.本数据集采集自一项研究项目，该项目探究外来入侵树种马占相思（Acacia mangium）Willd.对婆罗洲文莱达鲁萨兰国境内日益受威胁的低地热带石楠荒原Kerangas森林（Kerangas forest）中贫瘠砂质土壤的影响。研究团队于2015年从三类选定生境中采集土壤样本：原生Kerangas森林、受马占相思入侵的Kerangas森林，以及马占相思人工林。在每个样地内，分别于表层土壤（0 - 15 cm）与亚表层土壤（30 - 50 cm）两层各采集8个土壤岩心，并记录了重量含水量、有机质含量、土壤质地、氮（N）、磷（P）、钾（K）、镁（Mg）及钙（Ca）的养分浓度，交换态镁、钙、钾、有效磷含量与pH值等多项土壤参数。所有采样与分析工作均严格遵循标准实验规程开展。