Johnson Jean-Martial, Ibrahim Ali, Dossou-Yovo Elliott Ronald, Senthilkumar Kalimuthu, Tsujimoto Yasuhiro, Asai Hidetoshi, Saito Kazuki
Africa Rice Center (AfricaRice), 01 B.P. 2551, Bouaké 01, Cote d'Ivoire.
Institute of Crop Science and Resource Conservation (INRES), University of Bonn, D-53115, Bonn, Germany.
Glob Food Sec. 2023 Sep;38:100708. doi: 10.1016/j.gfs.2023.100708.
Where and which countries should receive higher priority for improving inorganic fertilizer use in rice fields in sub-Saharan Africa (SSA)? This study addressed this question by assessing the spatial variation in fertilizer use and its association with rice yield and yield gap in 24 SSA countries through a systematic literature review of peer-reviewed papers, theses, and grey literature published between 1995 and 2021. The results showed a large variation in N, P, and K fertilizer application rates and rice yield and an opportunity for narrowing the yield gap by increasing N and P rates, especially in irrigated rice systems. We identified clusters of sites/countries based on nutrient input and yield and suggested research and development strategies for improving yields and optimizing nutrient use efficiencies. Further research is essential to identify the factors causing low fertilizer use and the poor association between its use and yield in rainfed systems.
在撒哈拉以南非洲（SSA），哪些地区和国家在改善稻田无机肥料使用方面应获得更高优先级？本研究通过对1995年至2021年间发表的同行评审论文、论文和灰色文献进行系统的文献综述，评估了24个SSA国家肥料使用的空间变化及其与水稻产量和产量差距的关联，从而解决了这个问题。结果表明，氮、磷、钾肥料施用量和水稻产量存在很大差异，并且有机会通过提高氮和磷的施用量来缩小产量差距，特别是在灌溉水稻系统中。我们根据养分投入和产量确定了地点/国家集群，并提出了提高产量和优化养分利用效率的研发策略。进一步的研究对于确定导致肥料使用量低以及其在雨养系统中的使用与产量之间关联不佳的因素至关重要。
