A study was carried out to investigate the effects of fire related cues (heat and smoke) and sulphuric acid treatments on the germination of four woody savanna species, namely, Terminalia avicennioides, Piliostigma thonningii, Piliostigma reticulatum and Prosopis africana. The heat treatment consisted of putting seeds in a preheated oven at 100, 150 and 200 °C for 2.5 min. Seeds were then soaked in four concentrations of smoke solution (0 (tap water), 25, 50 and 100% smoke solutions). Parallel to smoke and heat treatment, seeds of the four species were each soaked in concentrated sulphuric acid for 2 hours and also according to the conventional soaking time of each species. Under experimental conditions, heat and smoke did not stimulate seed germination. For P. thonningii and P. africana, soaking seeds for 2 hours in sulphuric acid significantly increased germination capacity compared with conventional soaking time of 5 min. Longer soaking time reduced mean germination time. Results of this study will be useful in the establishment of these species. Satu kajian dijalankan untuk menyelidik kesan petunjuk api (haba dan asap) dan asid sulfurik terhadap percambahan empat spesies savana berkayu iaitu Terminalia avicennioides, Piliostigma thonningii, Piliostigma reticulatum dan Prosopis africana. Dalam ujian haba, biji benih dimasukkan ke dalam ketuhar pada suhu 100 °C, 150 °C dan 200 °C selama 2.5 min. Biji benih kemudiannya direndam dalam larutan asap berkepekatan 0% (air paip), 25%, 50% dan 100%. Selari dengan ujian asap serta haba ini, biji benih kempat-empat spesies direndam dalam asid sulfurik pekat sama ada selama 2 jam atau mengikut tempoh lazim setiap spesies. Hasil kajian menunjukkan bahawa haba serta asap tidak merangsang percambahan biji benih. Bagi P. thonningii dan P. africana, rendaman selama 2 jam dalam asid sulfurik meningkatkan keupayaan percambahan dengan signifikan berbanding dengan tempoh rendaman lazim selama 5 min. Tempoh rendaman yang lebih lama mengurangkan min tempoh percambahan. Keputusan ini amat berguna dalam usaha penanaman spesies yang dikaji.
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