Dataverse World Agroforestry (ICRAF)
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Assessing evolution with time of Dacryodes crassiflora seeds germination under various nusrsery conditions in humid tropics
No full textThe study was carried out to assess Dacryodes crassiflora seeds germination ability under various nursery conditions. Two factors were studies: Scarification (Yes or no) and nature of substrate (top soil, sawdust, sand, and a mixed up of sand and top soil).The trial was set up as a randomized complete block design with tree repetitions, 30 seeds per experimental unit. Individual seed germination status were recorded in the binary form (germinate or not; died or not) on a weekly basis from the fisrt week after sowing to the fifteen
weeks
Analyse de la chaine de valeur des produits agroforestiers: cas du miel dans la region du bas Congo et de Kinshasa en RDC
No full textCette étude de la chaîne de valeur du Miel a été menée pour corriger les écarts existants entre les acteurs de la filière miel dans la province du Bas-Congo et de Kinshasa. Nous avons recueillis les données primaires en 2010 à l’aide des questionnaires adressés à 102 producteurs, 79 commerçants et 51 consommateurs, et les données secondaires ont été obtenus à partir des observations personnelles dans la zone d’étude. Au niveau des producteurs, les marges bénéficiaires nettes sont respectivement de 1301,9 FC soit 1,45 US en période de rareté et d’abondance si la vente est individuelle ; par contre s’ils procèdent à la vente groupées leurs marges grimpent à 1471,8 FC soit 1,64 US. Pour les commerçants, les marges bénéficiaires nettes sont estimés à 1088,5 FC soit 1,2 US si les produit est vendu dans la zone d’étude
Ethnobotanical and socio economic study of some medicinal plants used in cancer treatment in the Boyo division in highland region of Cameroon: Lannea kerstingii, Geniosporum rotundifolium, Entada abyssinica and Ocimum gratissimum
No full textAn ethnobotanical and socio-economic study of some four medicinal plants used in cancer treatment was carried out in the Boyo Division of the northwest region of Cameroon from the 1st of April to the 31st of September 2010. The main objective of the study was to assess the use and evaluate the importance of Lannea kerstingii, Geniosporum rotundifolium, Entada abyssinica and Ocimum gratissimum to different user groups in the Boyo Division. Two sets of questionnaires were structured and addressed to 30 traditional
healers and 60 household heads. Data collected were analyzed using EXCEL 2007 and SPSS v. 12. Results show that 100% of respondents have some knowledge about O. gratissimum, while the least known medicinal species is L. kerstingii (known by 32.22% of respondents). The total percentages of those who know E. abyssinica and G. rotundifolium are 74.44% and 91.11% respectively. The main plant parts used for the shrubs are the leaves (with 72.1%) citations for O. gratissimum and 51.7% citations for G. rotundifolium), while for the tree species, the major plant part used is the tree bark (cited by 70.6% and 69.1% of users for L. kerstingii and E. abyssinica respectively). The main sources from which the species are harvested include the wild and home gardens. Those involved in collecting the plant species are the men, (22.4%) women (46.3%) and young people (31.3%). Apart from O. gratissimum which has been cited by the majority of respondents (70.59%) as being constant over the past few years, all the other species have been decreasing as cited by the majority of respondents (95.74%, 85.00% and 84.48% for L. kerstingii, E. abyssinica and G. rotundifolium respectively). Respondents attest there is a problem of scarcity and the causes of scarcity include amongst others, bush clearance for agriculture and construction, the drying up of plants during dry season, dry season bush fires, overharvesting, and slash and burn agriculture. The number of cancer patients received by traditional healers per month varies from 1 to 100 patients and the average cost of treatment is estimated at 23960FCFA. This study recommends: to ICRAF, to encourage cultivation of medicinal species through participatory tree domestication; to users of medicinal plants, to engage in sustainable harvesting practices, and to the government, to formalize the market for the medicinal plants as well as for the services provided by traditional healers
Replication data for: Group market impact on the exploitation of NTFP in Cameroon.
No full text40 individuals were sampled on group market impact on the exploitation of NTFP in Cameroon. Questionnaire was administered at different household level in Nkolfone, Nnemeyong, Nvamedja and Ntoumba villages. The questionnaire was divided into three sections: household characteristics, household socio-economic characteristics and the section for the collection and sales of NTFP by household
Replication data for: Factors affecting the dynamics of tree diversity in agroforestry parklands of cereal and cotton farming systems in burkina faso.
No full textDespite their socio-economic and ecological role, many studies have shown that the parklands are degrading very rapidly. Therefore, there is a need to undertake restoration actions for both production and environmental services. To do so, there is a need to identify factors that are affecting the dynamics of parkland systems. The present study aimed at characterizing and quantifying tree diversity of parkland systems taking into consideration the householdÂs wealth status, land uses, market access and the type of farming system (cereal based on the ÂPlateau Central and cotton based in ÂBoucle du MouhouÂ). Six villages (Kienfangu©, Ipelc©, and Kuizili with easy access to the market and, Karang-Tanghin, Nionsna and Targho with poor access to the market) in the Plateau Central and six villages (Bondoukuy, Ouahabou and Yaho with easy access to the market and, Dora, Fak©na and Mamou with poor access to the market) in ÂBoucle du Mouhoun were studied. In each village, the Participatory Analysis of Poverty and Livelihood Dynamics method was used by rural farmers to rank farmer households of their communities and that gave three groups of wealth status that are poor, fairly well-off and well-off. Five households representing each of the three wealth groups in each village, giving a total of 15 households per village, were randomly selected by wealth group. Tree/shrub inventories were conducted in all land use types (house fields, village fields and bush fields) of the 180 selected households for the 12 studied sites. The number of species in the different land use types ranged from 96 to 102, but the majority of species were represented by less than 10 individuals. This indicates the selection effect made by the farmers to the parklands. Land use and farming system showed a clear effect on tree diversity in parklands. The effect of accessibility to market was evident in some cases whereas wealth status did not show any effect. Despite the statistical significant effect of farming system and land use type, the ANOVA models accounted for relatively little variation, indicating that other factors may contribute to tree diversity in parkland systems. The most threatened species were Adansonia digitata, Afzelia africana, Bombax costatum, Celtis integrifolia, Ficus asperifolia, Ficus iteophylla, Lannea velutina, and Parkia biglobosa. These species were represented in the largest diameter class (80 cm) or showed very few individuals in the different diameter classes. Due to the increasing degradation of the parklands, a domestication and conservation strategy of key threatened species needs to be developed and implemented with the participation of local communities
Replication data for: Influence of fertilization scheme and sanitation measures on Irish Potatoe perfomance in Cameroon highland zone
No full textA field experiment was conducted in the Western Highlands of Cameroon to study the effects of Calliandra calothyrsus, sterilized compost, non-sterilized compost and mineral fertilizers (NPK 11:11:22) on physical characteristics, yield components and late blight disease severity of potato (Solanum tuberosum). A two factorial treatment combination made up of fertilization schemes and sanitary measures were laid out in a randomized complete block design (RCBD) with four replicates and 10 treatments. Data collected were subjected to a multivariate ANOVA and means separated with the Dunnett t-test with Calliandra calothyrsus considered as the main treatment. Mineral fertilizers and Calliandra calothyrsus significantly augmented stem diameter, plant height and plant vigor, total and marketable yields, despite the fact that late blight severity was high in the two treatments. The correlation matrix showed that total yield had significant and positive correlation with stem diameter (r = 0.74), plant height (r = 0.61), plant vigor (r = 0.61) and marketable yield (r = 0.99) and negative correlation (r = -37) with late blight severity. The increase observed is attributed to the nutrient contents of the treatments applied. Leafy prunings of C. calothyrsus increase soil organic matter which probably improves moisture retention and biological activity. The highest late blight severity recorded between the 45 and 60 coincides with active development of plant canopy which influences disease severity and create a canopy microclimate conducive to disease development. This study suggests that Calliandra calothyrsus has the potential of improving potato production provided appropriate fungicide is used
Characterisation of Gnetum africana plants growth parameters in southern Cameroon.
No full textThe study was carried out to characterise Gnetum africana plant in southern Cameroon from four provenace (Mbalmayo, Boumnyebel, Lekie-assi and Mfou). The plant came from five population and 15 plants were sampled in each population. appearance of inter node, leaves and branches were numbered from 1st to 33rd
Replication data for: Characterisation of Gnetum africana in southern Cameroon, ability to vegetative progation
No full textThis study was carried out to characterize Gnetum africana in southern Cameroon, altitude to vegetative propagation. Different substrates such as fine sand, sharp sand, sawdust, mixture were used as culture medium whereby some parameters such as the number of roots, number of vines, length of longest vine and number of leaves were measured
Dacryodes edulis genebank: Yearly assessment of plant growth and production characteristics in southern Cameroon
No full textThe ICRAF WCA-HT Dacryodes edulis genebank is a collection of 600 trees from 4 provenances (Kekem, makenene, Mboumnyebel and Ongot), 05 families per provenance and 30 trees per family making a total of 150 trees per provenance. From 2002 to 2009, trees parameters consisting of height, crown diameter, number of branches, number of inflorescence, flowering, fruiting, fruit length, fruit width, pulp thickness, fruit weight, kernel weight, pulp weight etc. are measured. The aims of the study being t
o characterize each family and provenance and select elite accessions that could be reproduced and recommended to enrich agroforestry system in Cameroon
Influence of substrate, cutting length, and hormone treatment on rooting ability of Dacryodes crassifora in the nursery
No full textThe study was carried out to determine the rooting ability of Dacryodes crassiflora cuttings in the nursery. A three way factorial treatment structure with substrates (3 levels), hormonal treatment (2 levels) and cutting length (2 levels) was used to assess the rooting ability of each cutting. The trial set up as a complete randomised blocks design with 3 replications. For each treatment combination, 8 cuttings were assessed per replication making a total of 288 cuttings used in the trial. Cutting status (rooted or not, died) were recorded weekly from the 4th to the 11th week after setting. For each rooted cutting, the number of roots was determined. Data collected were compiled in an Excel file and the rooting rate computed as a number of cuttings that have effectively rooted divided by the total number of cutting used in the trial were detemined and compared amont treatment combinations