Effects of different pre-Sowing treatments on germination of Peltophorum africanum Sond seeds from two provenances in Botswana

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Research Paper 01/02/2018
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Effects of different pre-Sowing treatments on germination of Peltophorum africanum Sond seeds from two provenances in Botswana

Witness Mojeremane, Thembinkosi Mathowa, Demel Teketay
J. Bio. Env. Sci.12( 2), 230-236, February 2018.
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A germination study of Peltophorum africanum seeds was conducted in the laboratory of the Department of Crop Science and Production, Botswana University of Agriculture and Natural Resources from May to June 2017. Seeds were collected from Butale and Gaborone to assess effect of pre-sowing treatments on germination. The experiment followed a completely randomized design (CRD) with five treatments; control, boiling water, hot water, mechanical scarification and concentrated sulphuric acid. The boiling water treatment had three different levels of time exposure, while the sulphuric acid had four different levels of time exposure. Seed germination percentages, germination mean time and germination index were significantly (P < 0.0001) affected by pre-sowing treatment methods. The maximum germination percentages (82-87) of Butale seeds were recorded in the mechanical scarified seeds, seed immersed in hot water and all sulphuric acid soaking times. The maximum germination percentages (75-88) in the Gaborone seeds were recorded in mechanical scarification, immersion in hot water, boiling water (1min) and sulphuric acid. Mechanical scarification and hot water are methods recommended for use by tree growers and farmers to break dormancy P. africanum because the acid is expensive and need trained people.


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