Land-use systems are among the leading sources of anthropogenic GHG into the atmosphere; driving global warming, climate change, and associated extreme weather events. To estimate GHGs from the land-use systems, we measured fluxes (positive/negative emissions per unit of time) of carbon dioxide (CO₂), nitrous oxide (N₂O), and methane (CH₄) from the cropping and adjacent non-cropping systems in Wakiso District, Uganda. The study comprised of 9 treatments with 2 inter-cropping systems (banana-coffee and maize-beans), 4 sole-cropped systems (banana, maize, beans, and sweet potato), and 3 non-cropping systems (fallow lands, pasture lands, and grasslands). Four management practices: mulching with no-tillage (mulched-NT); non-mulching with reduced-tillage (non-mulched-RT); non-mulching with deep-tillage (non-mulched-DT); compositing with reduced-tillage (compost-RT) were embedded in the cropping systems. The study also assessed the effect of the cropping systems and their management practices on crop yields. The GHG fluxes were monitored using the static chamber technique and analysed using a gas chromatography (G.C.). The results showed that all the land-use systems were sources of CO₂ flux with sole-cropped sweet potato under non-mulched-DT (148.12 ± 3.4 μg C m⁻² h⁻¹) as the most substantial source, and the grasslands (33.03 ± 1.7 μg C m⁻² h⁻¹) as the weakest source. Similarly, all the land-use systems were sources of N₂O flux with sole-cropped beans under non-mulched-RT (14.21 ± 0.4 μg N m⁻² h⁻¹) as the strongest source, and grasslands (3.43 ± 0.4 μg N m⁻² h⁻¹) as the weakest source. The management practices were sinks (any system that absorbs more GHGs than it releases) of CH₄ except mulched-NT in the maize-beans intercrop, sole-cropped beans, and sole-cropped maize. The sole-cropped sweet potato under mulched-RT (0.3 ± 0.01 μg C m⁻² h⁻¹) was the strongest source of CH₄, while the grasslands (−0.67 ± 0.01 μg C m⁻² h⁻¹) were the strongest sink. The intercropped systems significantly reduced GHG fluxes and had a yield advantage relative to the sole-cropped systems. Our results suggested that intercropping in central Uganda could be a more sustainable and eco-friendly approach concerning GHG fluxes.

土地利用系统是人为温室气体排入大气的主要来源。推动全球变暖，气候变化以及相关的极端天气事件。为了估算土地利用系统中的温室气体，我们测量了二氧化碳（CO ₂），一氧化二氮（N ₂ O）和甲烷（CH ₄）来自乌干达Wakiso区的农作物和邻近的非农作物系统。该研究包括9种处理方法，其中包括2种间作系统（香蕉咖啡和玉米豆），4种单作系统（香蕉，玉米，豆类和甘薯）和3种非间作系统（休耕地，牧场）土地和草原）。四种管理方式：免耕覆盖（multed-NT）；非耕作减耕（非耕作RT）；不深耕覆盖（非覆盖DT）；在耕作系统中嵌入了减少耕作的复合肥料（compost-RT）。该研究还评估了种植系统及其管理措施对作物产量的影响。使用静态室技术监测温室气体通量，并使用气相色谱仪（GC）进行分析。结果表明，所有土地利用系统都是CO的来源。₂在非地膜-DT（148.12±3.4微克C M通量随鞋底裁剪甘薯^-2  ħ ^-1）作为最重要来源，和草原（33.03±1.7微克C M ^-2  ħ ^-1）作为最弱的来源。同样，所有土地利用系统都是N ₂ O通量的来源，其中以非覆盖RT（14.21±0.4μgN m ^-2  h ^-1）为唯一来源的单作豆为最强来源，而草地（3.43±0.4）为最强来源。 μgN m ^-2  h ^-1）作为最弱的来源。管理实践是CH _4的汇（任何吸收比其释放的GHG多的系统）除玉米-豆间作，单作豆和单作玉米中的覆盖NT。鞋底裁剪甘薯下地膜-RT（0.3±0.01微克C M ^-2  ħ ^-1）为CH最强源₄，而草地（-0.67±0.01微克C M ^-2  ħ ^-1）是最强的水槽。间作系统显着降低了温室气体通量，并且相对于单作系统具有产量优势。我们的结果表明，乌干达中部的间作可能是一种关于温室气体通量的更可持续和生态友好的方法。