In sub‐Saharan Africa (SSA), few studies have quantified greenhouse gas (GHG) emissions following application of soil amendments, for development of accurate national GHG inventories. Therefore, this study quantified soil GHG emissions using static chambers for two maize cropping seasons (one full year) of four different soil amendments in the central highlands of Kenya. The four treatments were (i) animal manure, (ii) inorganic fertilizer, (iii) combined animal manure and inorganic fertilizer, and (iv) a no‐N control (no amendment) laid out in a randomized complete block design. Cumulative annual soil fluxes (February 2017 to February 2018) ranged from −1.03 ±  0.19 kg CH₄‐C ha⁻¹ yr⁻¹ from the manure inorganic fertilizer treatment to −0.09 ±  0.03 kg CH₄‐C ha⁻¹ yr⁻¹ from the manure treatment, 1,391 ±  74 kg CO₂‐C ha⁻¹ yr⁻¹ from the control treatment to 3,574 ±  113 kg CO₂‐C ha⁻¹ yr⁻¹ from the manure treatment, and 0.13 ±  0.08 to 1.22 ±  0.12 kg N₂O‐N ha⁻¹ yr⁻¹ in the control and manure treatments, respectively. Animal manure amendment produced the highest cumulative CO₂ emissions (P  < 0.001), N₂O emissions (P  < 0.001), and maize yields (P  = 0.002) but the lowest N₂O yield‐scaled emission (YSE) (0.5 g N₂O–N kg⁻¹ grain yield). Manure combined with inorganic fertilizer had the highest cumulative CH₄ uptake (P  < 0.001) and N₂O YSE (2.2 g N₂O–N kg⁻¹ grain yield). Our results indicate that while the use of animal manure may increase total GHG emissions, the concurrent increase in maize yields results in reduced yield‐scaled GHG emissions.

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东非不同土壤肥力管理措施下玉米生产的土壤温室气体通量

在撒哈拉以南非洲（SSA），很少有研究对土壤改良剂应用后的温室气体（GHG）排放进行量化，以建立准确的国家温室气体清单。因此，本研究使用肯尼亚肯尼亚中部高地四种不同土壤改良剂的两个玉米种植季节（一年）的静态室对土壤温室气体排放进行了量化。四种处理方法是（i）动物粪便；（ii）无机肥料；（iii）动物粪便和无机肥料的混合；以及（iv）在随机完整块设计中布置的无氮对照（无修正）。年度累积土壤通量（2017年2月至2018年2月）范围为−1.03  ±  0.19 kg CH _4‐ C ha ⁻¹  yr ^-1从粪肥无机肥处理到-0.09  ±  0.03 kg CH ₄ ‐C ha ^-1  yr ^-1从粪肥处理，从1,391  ±  74 kg CO ₂ –C ha ^-1  yr ^-1从对照处理到3,574  ±  113 kg粪便处理产生的CO ₂ -C ha ^-1  yr ^-1，对照和粪肥处理分别产生0.13  ±  0.08至1.22  ±  0.12 kg N ₂ O-N ha ^-1  yr ^-1。动物粪便修正产生最高的累积CO_2种排放量（P  <0.001），N ₂ O排放量（P  <0.001）和玉米单产（P  = 0.002），但最低的N ₂ O产量标度排放量（YSE）（0.5 g N ₂ O–N kg ^-1谷物产量）。粪肥和无机肥料的累积累积CH ₄吸收最高（P  <0.001）和N ₂ O YSE（2.2 g N ₂ O–N kg ^-1谷物产量）。我们的结果表明，虽然使用动物粪便可能会增加温室气体的总排放量，但同时增加玉米单产会减少单产规模的温室气体排放量。