A study on the adaptation of improved varieties of rice was carried out in ISEA Bokonzi experimental site in Kungu territory, Sud Ubangi province (Democratic Republic of the Congo). The main objective of the study was to evaluate the adaptation of these three improved varieties (IRAT 112, NERICA 7 and NERICA 4) in the territory of diffusing. The results showed no significant differences between them and all varieties were well adapted in the ecological conditions of the experimental site. However, in the harvest, NERICA 7 revealed a great yield of rice in husk.
The influence of combination of agricultural product (rice bran)/fertilizer (goat dropping and manner NPK-17-17-17) was tested within 9 months in growing performances of Nile tilapia, bred in semi-drained pond. The mean results showed that the parameters of aquatic environment, in particularly temperature (29°C - 36°C) and pH (5.5 – 6.5), fluctuate in the tolerance limits of Nile tilapia. Growing performances are interesting: Rice bran combined with mineral or organic fertilization profit well to Nile tilapia growing with 0.42g/day of weight advantage against 0.29g/day for the witness. It is the same for yield which is 1.8 times and 1.7 times more the witness, about an increasing of 80.5 and 67.6% of natural productivity, respectively for NPK-17-17-17 and organic fertilizer goat dropping-based.
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