Évaluation de la productivité du maïs ( Zea mays L.) sous amendements organique et minéral dans la province de Lomami, République Démocratique du Congo

Abstract

Objective: The study aims to evaluate the effect of Entada abyssinica and Tithonia diversifolia buried on the ground compared to the NPK (17-17-17), only and in organomineral combination on the growth and the yield corn. Methodology and Results: The test was carried on the experimental site of the University Our - Lady of Lomami to Kabinda and was installed according to a device in randomized complete blocks. The treatments, in three repetitions, consisted of a witness (T0), of five levels of fertilizer contribution : biomasses of E. abyssinica and T. diversifolia, NPK, E. abyssinica +NPK and T. diversifolia +NPK. The observations had related to the parameters of growth and production. The results obtained inform that the corn answered positively in the phase of growth under effect of fertilizer indistinctly of their nature (p<0.05) compared to the witness. The highest height was observed on the treatment E. abyssinica+NPK with 180 cm against the pilot treatment with 123.33 cm. The diameter with the collet followed the same tendency with E. abyssinica (2.20 cm) against 1.03 cm for the witness. What allowed observer of significant differences. The organomineral combination Entada abyssinica +NPK emerged on all parameters in this study by taking the head of the group. The productivity gave Entada abyssinica +NPK (2653.33 kg/ha) > Tithonia diversifolia +NPK > Entada abyssinica > NPK > Tithonia diversifolia > witness (466.42 kg/ha). Conclusion and principal applications of research: The application of the biomasses T. diversifolia and E abyssinica in organomineral combination on a corn culture show a multiple role on the physics, the chemistry and the biology of the ground with like consequence an increase in the productivity of about 2186,91 kg of grains compared to the ground untreated. The biomasses used only also gave good results compared to the witness. Considering the difficulties of accessibility to mineral manure, the use of E abyssinica and T. diversifolia in an environment as this one contributes with the promotion of the contribution of this organic matter in the majority of the poor grounds.