Soil poverty constitutes one of the main constraints which limit the productivity of crops and particularly vegetable crops in Niger. The rational use of organic and mineral fertilizers is necessary not only to overcome low soil fertility but also and above all to correct nutrient deficiencies due to poor soil management practices. This study was conducted, aiming to assess the effects of organic fertilizers (compost and biochar) and mineral fertilizers (NPK 15 15 15 and UREE) on the productivity of tomato (Solanum lycopersicum) cv Tropimech. The study is carried out at the Saga experimental. in a completely randomized block design consisting of three repetitions and six treatments including a control treatment (T0). treatments are: T0 (without fertilizer); T1 (10t/ha of compost); T2 (0.5t/ha of Biochar); T3 (5kg/ha of Grower Fertilizer); T4 (25kg/ha of Urea + 125kg/ha of NPK 15 15 15); T5 ((10t/ha of compost+0.5t/ha of Biochar+5kg/ha of FertilizerGrower+25kg/ha of Urea +125kg/ha of NPK 15 15 15). The results showed that the biomass yields (40.89±15.06t/ha) and fruit yields (14.93±7.79t/ha) recorded for the treatments T0 (without fertilizer) are part of the low yields recorded in the study and that All doses of fertilizers administered gave good yields (21.39±15.48t/ha to 32.05±25.20t/ha). Treatments T1 and T2 gave satisfactory results and good fruit quality (86.20±10.227% and 79.93±12.470%) with only respective doses of 10t/ha of compost and 0.5t/ha of biochar. On this basis, we can admit that a reduction in the dose of mineral fertilizer and a sufficient supply of organic manure will be essential to ensure a better yield of tomato fruits.
