Centennial deforestation impacts on soil phosphorus cycling in the Amazon rainforest

Deforestation of tropical rainforests is a major land use change that alters terrestrial biogeochemical cycling at local to global scales. Deforestation and subsequent reforestation are likely to impact soil phosphorus (P) cycling, which in P-limited ecosystems such as in the Amazon basin has implications for long-term land use change and productivity. We used a 100-year observational chronosequence of primary forest conversion to pasture, as well as a 13-year-old secondary forest, to test land use change and duration effects on soil P dynamics in the Amazon basin. By combining sequential extraction and P K-edge X-ray absorption near edge structure (XANES) spectroscopy with soil phosphatase assays, we assessed pools and process rates of P cycling in surface soils. Deforestation caused increases in total P (135-398 mg kg-1), total organic P (Po) (19-168 mg kg-1), and total inorganic P (Pi) (30-113 mg kg-1) fractions in surface soils with pasture age, with concomitant increases in Pi frac..., The methods of this dataset can be found in the related article., , # Centennial deforestation impacts on soil phosphorus cycling in the Amazon rainforest We used a 100-year observational chronosequence of primary forest conversion to pasture, as well as a 13-year-old secondary forest, to test land use change and duration effects on soil P dynamics in the Amazon basin. By combining sequential extraction and P K-edge X-ray absorption near edge structure (XANES) spectroscopy with soil phosphatase assays, we assessed pools and process rates of P cycling in surface soils. ## Description of the data and file structure All experiment results are included in the uploaded Excel file. Data description can be found in the corresponding manuscript once it's published. Basically, the sampling area has served as a model for studying forest-to-pasture conversion due to staggered times of primary forest conversion to pasture over the last century, which enables characterizing long-term changes in soil P cycling in the present study. We carefully selected specific...热带热带雨林的砍伐是主要的土地利用变化类型，可在局地至全球尺度上改变陆地生物地球化学循环。森林砍伐及后续的再造林活动，大概率会对土壤磷（P）循环产生影响；而在亚马孙流域这类磷受限的生态系统中，土壤磷循环变化对长期土地利用变化及生态系统生产力具有重要意义。本研究依托100年尺度的原始林转牧场时间序列观测样地，以及一块13年生的次生林，旨在探究土地利用变化及其持续时长对亚马孙流域土壤磷动态的影响。本研究将连续萃取法、磷K边X射线吸收近边结构（XANES）光谱技术与土壤磷酸酶活性测定相结合，对表层土壤的磷库及磷循环过程速率进行了评估。研究发现，随牧场经营年限增加，表层土壤总磷（135~398 mg kg⁻¹）、总有机磷（Po，19~168 mg kg⁻¹）及总无机磷（Pi，30~113 mg kg⁻¹）组分均有所提升，无机磷组分亦伴随升高……本数据集的相关方法可查阅已发表的相关论文。 # 百年森林砍伐对亚马孙雨林土壤磷循环的影响 本研究依托100年尺度的原始林转牧场时间序列观测样地，以及一块13年生的次生林，旨在探究土地利用变化及其持续时长对亚马孙流域土壤磷动态的影响。本研究将连续萃取法、磷K边X射线吸收近边结构（XANES）光谱技术与土壤磷酸酶活性测定相结合，对表层土壤的磷库及磷循环过程速率进行了评估。 ## 数据与文件结构说明 所有实验结果均包含于上传的Excel文件中。数据详细描述可待对应论文正式发表后查阅。简言之，由于过去一个世纪以来原始林转牧场的时间存在先后差异，该采样区域已成为研究林草转化的典型模式，为本研究表征土壤磷循环的长期变化提供了支撑。我们精心筛选了特定的……