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的两处小农农场，采集周期为一整年（2019年4月—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）排放情况。本次研究涉及的种植系统包括：i) 单作玉米、ii) 玉米-豆类间作、iii) 农林业、iv) 香蕉种植、v) 咖啡种植。 温室气体数据涵盖二氧化碳（carbon dioxide, CO₂）、甲烷（methane, CH₄）与一氧化二氮（nitrous oxide, N₂O），采用静态箱法采集，气体样品通过气相色谱法完成分析。土壤样品采集于0—20 cm土层，测定指标包括容重、pH值、有机碳含量与总氮含量。研究期间全程记录了日降水量与土壤含水率。 在两个种植季内，对生物量（籽粒、叶片、茎秆与根系）进行了测定。为核算温室气体排放量，研究人员计算了累积排放通量。本研究采用包括方差分析（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。 本数据集为下述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贡献有限的温室气体通量》，《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