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Ability of Carissa edulis Guill. & Perr., 1832 to reproduce vegetatively by aerial layering in the high savannas of Guinea (Adamaoua, Cameroon)

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Author Affiliations

  • 1Department of Biological Sciences, Faculty of Science, The University of Ngaoundéré, P.O. Box 454 Ngaoundéré, Cameroon
  • 2Department of Plant Sciences, Faculty of Science, The University of Bamenda, P.0. Box 39 Bambili, Cameroon
  • 3Laboratory of Agroecology and Agricultural Sciences, Department of Plant Production, Higher Institute of Agriculture, Forestry, Water and Environment of University of Bertoua, P.O. Box 416 Bertoua, Cameroun
  • 4University of Maroua, Maroua Polytechnic School, P.O. Box 46 Maroua, Cameroon
  • 5Department of Biological Sciences, Faculty of Science, The University of Ngaoundéré, P.O. Box 454 Ngaoundéré, Cameroon
  • 6Department of Biological Sciences, Faculty of Science, The University of Ngaoundéré, P.O. Box 454 Ngaoundéré, Cameroon
  • 7Department of Biological Sciences, Faculty of Science, The University of Ngaoundéré, P.O. Box 454 Ngaoundéré, Cameroon
  • 8Department of Biological Sciences, Faculty of Science, The University of Ngaoundéré, P.O. Box 454 Ngaoundéré, Cameroon

Res. J. Agriculture & Forestry Sci., Volume 13, Issue (4), Pages 1-9, October,8 (2025)

Abstract

The Sudano-Sahelian zone of Cameroon is rich in many species of high socio-economic value. Carissa edulis is one of the fruit species highly valued by local populations. Despite its importance in the farming community, it still grows in the wild. The objective of this study is to contribute to the domestication of this species by aerial layering. Two trials were conducted. The first aimed to test three substrates (black soil, sawdust, and a mixture of black soil and sawdust in equal proportions) on branches ranging in diameter from 0-1.5cm and 1.6-3cm. The experimental design used was a split-plot with three replicates. The substrate was the primary treatment and the diameter was the secondary treatment. The second trial focused on the influence of covering with aluminum foil and the orientation of the branches on the rooting of the layers. The experimental design used was a split-plot with three replicates. The first factor was covering and the second factor was branch orientation. The results showed 67% callogenesis with 53.33+13.66% rooting in black soil substrate, 73.33±16.32% in sawdust, and 75±18.40% in a mixture of black soil and decomposed sawdust. Diameter significantly influences the rooting of layering. This rooting rate ranges from 55.55+10.13% for the range 0-1.5cm to 78.88±17.63% for the range 1.6-3cm. Uncovered layering rooted at a rate of 73.33±8.16% compared to 93.33±8.16% for covered layering. East and west orientations of the layering resulted in rooting rates of 88.33±9.83% and 78.33±14.71%, respectively. During acclimatization, a survival rate of 99% and a recovery rate of 88% were observed. These results are important for the domestication process of this species of socioeconomic interest.

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