Datasets for the article “Smallholder cropping systems contribute limited greenhouse gas fluxes in upper Eastern Kenya”

The datasets were collected from two smallholder farms in Upper Eastern Kenya over a year (April 2019–April 2020). The study aimed to quantify greenhouse gas (GHG) emissions from different smallholder cropping systems. The cropping systems investigated included i) sole maize, ii) maize-beans intercrop, iii) agroforestry, iv) banana, and v) coffee. The GHG data (carbon dioxide [CO₂], methane [CH₄], and nitrous oxide [N₂O]) were collected using static chamber methods, and gas samples were analyzed using gas chromatography. Soil samples were collected at 0 –20 cm depth and analyzed for bulk density, pH, organic carbon, and total nitrogen. Daily precipitation and soil moisture content were recorded throughout the study. Biomass measurements (grain, leaves, stems, and roots) were measured for the two cropping seasons. To determine GHG emissions, cumulative fluxes were calculated. Statistical analysis, including analysis of variance (ANOVA), was conducted to evaluate differences in GHG emissions across cropping systems. This dataset is supplementary to the research article Lemarpe, S.E., Musafiri, C.M., Kiboi, M.N., Ng'etich, O.K., Macharia, J.M., Shisanya, C.A., Kibet, E., Zeila, A., Mutuo, P. and Ngetich, F.K., (2023). Smallholder cropping systems contribute limited greenhouse gas fluxes in upper Eastern Kenya. Nature-Based Solutions, 4, p.100098. https://doi.org/10.1016/j.nbsj.2023.100098

本数据集采集自肯尼亚东部上区域两处小农经营农场，采集周期为一年（2019年4月至2020年4月）。本研究旨在量化不同小农种植系统的温室气体（Greenhouse Gas, GHG）排放。本次调研涵盖的种植系统包括：i）单作玉米田，ii）玉米-豆类间作田，iii）农林业系统，iv）香蕉种植园，v）咖啡种植园。温室气体数据（二氧化碳[CO₂]、甲烷[CH₄]及一氧化二氮[N₂O]）采用静态箱法采集，气体样品通过气相色谱仪进行分析。土壤样品采集深度为0–20 cm，检测指标包括容重、pH值、有机碳及总氮含量。研究周期内全程记录日降水量与土壤含水率。在两个种植季内开展生物量测定，测定指标包括籽粒、叶片、茎秆与根系生物量。为核算温室气体排放，本研究计算了累积通量。采用包括方差分析（Analysis of Variance, ANOVA）在内的统计方法，评估不同种植系统间温室气体排放的差异。本数据集为以下研究论文的补充数据：Lemarpe, S.E.、Musafiri, C.M.、Kiboi, M.N.、Ng'etich, O.K.、Macharia, J.M.、Shisanya, C.A.、Kibet, E.、Zeila, A.、Mutuo, P. 与 Ngetich, F.K.（2023），《肯尼亚东部上区域小农种植系统的温室气体通量贡献有限》，《基于自然的解决方案》（Nature-Based Solutions），第4卷，第100098页。https://doi.org/10.1016/j.nbsj.2023.100098