Journal of
Horticulture and Forestry

  • Abbreviation: J. Hortic. For.
  • Language: English
  • ISSN: 2006-9782
  • DOI: 10.5897/JHF
  • Start Year: 2009
  • Published Articles: 299

Full Length Research Paper

Pre-sowing treatments for enhancing germination of Guibortia coleosperma and Amblygonocarpus andongensis seeds from Kazuma Forest Reserve, Botswana

Melusi Rampart
  • Melusi Rampart
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Demel Teketay
  • Demel Teketay
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Witness Mojeremane
  • Witness Mojeremane
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Ronnie Mmolotsi
  • Ronnie Mmolotsi
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Gosiame Neo-Mahupeleng
  • Gosiame Neo-Mahupeleng
  • Department of Wildlife and Aquatic Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Kamogelo Makgobota
  • Kamogelo Makgobota
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Kakambe Obusitswe
  • Kakambe Obusitswe
  • Department of Forestry and Range Resources, P. O. Box 140, Kasane, Botswana
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Topoyame Makoi
  • Topoyame Makoi
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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Ismael Kopong
  • Ismael Kopong
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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David Monekwe
  • David Monekwe
  • Department of Range and Forest Resources, Faculty of Natural Resources Botswana University of Agriculture and Natural Resources, Private Bag 0027, Gaborone, Botswana.
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  •  Received: 28 May 2021
  •  Accepted: 04 August 2021
  •  Published: 30 September 2021

Abstract

The effect of seed presowing treatment on Guibortia coleosperma and Amblygonocarpus andongensis was investigated. Seeds of both species were subjected to four experiments, containing 10 levels of presowing treatments: mechanical scarification, soaking in concentrated sulphuric acid (for 15, 30, 45 and 60 min), immersion in boiling water (for 1, 3 and 5 min), and soaking in boiling water (and cooling down for 24 h) and the control. The germination data were subjected to ANOVA followed by Tukey’s HSD test to separate significantly different treatment means. The highest germination in G. coleosperma was recorded: mechanical scarified seeds, those soaked in sulphuric acid (15, 30, 45 and 60 min), hot water (and cooling down for 24 h) and the control seeds. For A. andongensis, seeds treated with mechanical scarification, exposure to sulphuric acid (15, 30, 45 and 60 min) and boiling water (1 min) had higher percent germination than the controls.

Key words: Germination mean time, germination percentage, pre-treatment, scarification.