Influence des plantes adventices sur les plantes de culture : quelques résultats

The author tries to bring to light the relationships between weeds and cultivated plants as well as the competition between them in the absorption of food materials.L'auteur tente de mettre en évidence certaines relations entre les mauvaises herbes et les plantes cultivées et la compétence qui existe entre ces plantes pour l'absorption des matières nutritives.Mosango M. Influence des plantes adventices sur les plantes de culture : quelques résultats. In: Journal d'agriculture traditionnelle et de botanique appliquée, 30ᵉ année, bulletin n°1, Janvier-mars 1983. pp. 35-48

Chemical Characteristics of Six Woody Species for Alley Cropping

Leaves of six woody species (Leguminosae) for alley cropping have been chemically analysed in order to evaluate their potentiality in the restoration of soil fertility. These species are : Acacia mangium, Cajanus cajan, Flemingia grahamiana, F. macrophylla, Leucaena leucocephala and Sesbania sesban. Nitrogen, carbon, cellulose, hemicellulose, lignin, active fraction and ash contents were determined as well as C/N and L/N ratios. AH these species appear to be rich in N and C. Fiber contents (cellulose, hemicellulose and lignin) are globally low but variable from one species to another. C/N and L/N ratios are globally low. Among these species, Leucaena leucocephala and Senna spectabilis show the lowest C/N and LIN ratios. Such low values of C/N and L/N are normally found in species with rapid decomposition of organic matter

Plantes sauvages à fruits comestibles dans les environs de Kisangani (Zaïre)

Wild plants bearing edible fruit in the surroundings of Kisangani (Zaire). — The authors have compiled a list of 48 species of wild plants bearing edible fruit which are useful to the population around Kisangani. For each species, they indicate its geographical distribution, morphological type, fruit bearing period, type of fruit and uses as well as its vernacular name.Les auteurs ont recensé 48 espèces de plantes sauvages à fruits comestibles utiles à la population environnante de Kisangani. Ils indiquent aussi la distribution phytogéographique, les types morphologiques, les périodes de fructification, les types de fruits et les modes de consommation ainsi que les noms vernaculaires de ces plantes.Mosango M., Szafranski F. Plantes sauvages à fruits comestibles dans les environs de Kisangani (Zaïre). In: Journal d'agriculture traditionnelle et de botanique appliquée, 32ᵉ année,1985. pp. 177-190

Effect of Water Harvesting on Species Diversity and Overall Rangeland Recovery in Kagera Microcatcbement

Plant species diversity was investigated on ridges with and without water harvesting structures. The effect of water harvesting technology on the soil properties and rangeland recovery was also investigated. The experimental sites are located in Kifamba, Kakuuto County Rakai District. Plant species were recorded on a 50m horizontal transect aligned on the main transect running S-N on a 20m lag. The quadrat method was used to sample grasses and herbs, whereas shrubs and trees were sampled on twenty five meter plots on consecutive horizontal transects. Soil physical and chemical properties, plant biomass and ground cover were determined along the landscape. Results indicate that, ridges with water harvesting structures bad higher species diversity than those without water harvesting structures (p<0.05). The plant diversity on ridges with water harvesting (Shannon Diversity index) was H' =4.46, while the diversity of ridges without water harvesting was H' =3.93. The two types of ridges were significantly different (p<0.001) in terms of the diversity of plant species. The results further reveal that the introduction of water harvesting structures did not induce a landscape position pattern in the distribution of species, but that of grass biomass, despite the uniformity of chemical properties along the landscape (p<0.05).Keywords: Ecology, Rangeland restoration, Species diversity, Land productivity