Productivité en feuille de quatre variétés de Brachiaria brizantha (Poaceae) aux différents stades phénologiques dans la région écologique de Kisangani, République démocratique du Congo

Abstract

This study evaluated the leaf productivity of four varieties of Brachiaria brizantha multiplied by stump burst under the ecological conditions of Kisangani. After experimentation in a complete random block device, the results showed that B. brizantha produced differently depending on the variety and phenological stage. The overall productivities in leaf of three phenological stages are 20693.78; 14559.79; 12270.21 and 11778.87 KgDM/ha respectively for the Piata, Xaraes, Locale and Marandu variety. The leaf productivity of these varieties at the different phenological stages of the vegetative phase is presented in decreasing order as follows: Early tillering stage: Marandu (2039.05) > Piata (1794.42) > Locale (1675.24) > Xaraes (1618.86); Full tillering stage: Piata (8350.34) > Xaraes (4543.27) > Marandu (2768.49) > Locale (2275.52); Late tillering stage: Piata (10549.02) > Xaraes (8397.67) > Locale (8319.45) > Marandu (6971.33). These results show that under the ecological conditions of Kisangani, the Piata variety is better suited for fodder production and could serve as an alternative fodder for livestock in an emergency situation, particularly in the event of a shortage due to the poor quality of the agrostological flora. However, the evaluation of the bromatological characteristic at the different phenological stages of different varieties of B. brizantha is in progress.