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L’effet des differents niveaux de fertilisation aux fientes de poules sur la croissance et la production de biomasse de B. ruziziensis en fonction des stades phenologiques a ete etudie a l’Ouest-Cameroun. Cette etude avait pour objectif d’evaluer les effets des differents niveaux de fertilisation aux fientes de poules sur la croissance et la production de biomasse de B. ruziziensis a differents stades phenologiques. Un dispositif factoriel comparant cinq doses d’azote sous forme de fientes de poules (0 ; 25 ; 50 ; 75 et 100 kg N/ha) et trois stades phenologiques (montaison, floraison et apres grenaison) sur des parcelles de 6 m2 (3 x 2 m) en quatre repetitions, soit un total de 60 parcelles experimentales a ete utilise. Les fientes de poules ont ete repandues un mois apres la plantation des eclats de souches. A chaque stade phenologique, 40 plantes ont ete prelevees par traitement pour les mesures des hauteurs et des diametres. L’evaluation de la biomasse des tiges, des feuilles et de la plante entiere s’est faite sur chaque parcelle en fonction du niveau de fertilisation et du stade phenologique. Les resultats obtenus ont montre que la fertilisation aux fientes de poules a augmente de maniere significative la taille, le diametre, les biomasses des feuilles, des tiges et des plantes entieres des parcelles fertilisees de B. ruziziensis par rapport a celui des parcelles temoins et proportionnellement aux quantites de fientes repandues. Les tailles, les diametres et les biomasses des plantes entieres les plus elevees ont ete obtenues avec la fertilisation a la dose de 100 kg N/ha. L’etude a montre que les fientes de poules dans les conditions de cet essai ont augmente la disponibilite en elements nutritifs du sol et ont pu fournir la quantite d’elements nutritifs necessaires a la culture de B. ruziziensis. Mots cles : Brachiaria ruziziensis , fiente de poules, taille, diametre, biomasse, Dschang. English Title: Effects of different levels of fertilization with chicken manure on the growth and biomass production of Brachiaria ruziziensis (Poaceae) according to phenological stages in West Cameroon The effect of different levels of chicken manure fertilization on the growth and biomass production of B. ruziziensis according to phenological stages was studied in West Cameroon. The objective of this study was to evaluate the effects of different levels of chicken manure fertilization on the growth and biomass production of B. ruziziensis at different phenological stages. A factorial device comparing five doses of nitrogen in the form of chicken manure (0; 25; 25; 50; 75 and 100 kg N/ha) and three phenological stages (bolting, flowering and after seed set) on 6 m2 (3 x 2 m) plots in four replicates, for a total of 60 experimental plots was used. The chicken manure were spread one month after the planting of the stump chips. At each phenological stage, 40 plants were collected per treatment for height and diameter measurements. The evaluation of stem, leaf and whole plant biomass was carried out on each plot according to the level of fertilization and phenological stage. The results obtained showed that fertilization with chicken manure significantly increased the height, diameter, biomass of leaves, stems and whole plants of the fertilized plots of B. ruziziensis compared to that of the control plots and in proportion to the quantities of chicken manure spread. The highest plants, diameters and biomass of the highest whole plants were obtained with fertilization at 100 kg N/ha. The study showed that chicken manure under the conditions of this test increased the availability of soil nutrients and were able to provide the amount of nutrients needed to grow B. ruziziensis . Keywords : Brachiaria ruziziensis , chicken manure, height, diameter, biomass, Dschang.

international journal of biological and chemical sciences

Effets des différents niveaux de fertilisation aux fientes de poules sur la croissance et la production de biomasse de &lt;i&gt;Brachiaria ruziziensis&lt;/i&gt; (Poaceae) en fonction des stades phénologiques à l’Ouest-Cameroun