Combined Effects of Organic and Mineral Fertilizers on Soil Productivity in Tomato Production: Experiments on Soils of the Coast Road of Yantala-Bas

Abstract

Tomato is the most widely grown vegetable in Africa. It goes into the preparation of many dishes, given its nutritional importance due to its content in active substances such as vitamins A and C, iron and phosphorus. Experiments were set up on a vegetable growing site at INRAN’s headquarters. This consisted in three trials with different treatments on tomato. Treated rice husk (150 g per plant) was used in the first trial and NPK (0, 2, 4, 6 g per pocket) in the second trial, whereas the third trial included the use of organic manure (1 kg of manure per bed), burned rice husk (1 kg per bed) and rock phosphate (2 g per pocket). Each trial was carried out in complete randomized block with three replicates. The results of these three trials show that the yield of 29 t ha⁻¹ achieved with the application of treated rice husk (1.6 t.ha⁻¹ rice husk 1.6 t ha⁻¹, 1.6 t ha⁻¹ sandy- soil +1.6 t ha⁻¹ incubated manure for 14 days) per plant was higher compared to the yield of 25.6 t.ha⁻¹ obtained by the application of a microdose of NPK (PP+ 6 g NPK per pocket or 187.5 kg ha⁻¹) per plant. These first two treatments were more efficient than the combination of carbonized rice husk and organic manure (PP + NPK + BRC + PNT incubated for 14 days) per bed, with 22.4 t.ha⁻¹. This clearly shows that the treatment with treated rice husk further improves the soil structure. This favors a good vegetative development and higher yields.