Southern Forests: a Journal of Forest Science

Log in or Register to get access to full text downloads.

Remember me or Register

DOWNLOAD FULL TEXT Open Access  DOWNLOAD FULL TEXT Subscription or Fee Access

Performance of planted indigenous trees, Acacia galpinii and Faidherbia albida, in semi-arid Botswana

KP Walker, JM Theron, B Moseki


Two popular indigenous browse, shade and poles trees, Acacia galpinii and Faidherbia albida, were evaluated for survival and growth on-farm in Malotwana, Botswana, with a mean annual rainfall of 450 mm. The trial was a two species × three spacing factorial experiment in a randomised complete block design replicated five times. The three spacings were 5 m × 5 m, 6.3 m × 5 m and 8.3 m × 5 m. The study was conducted over 6.5 years. The results showed that A. galpinii is a promising poles, browse and shade species, while F. albida exhibited high mortality (67%) at 4.5 years (after below-average rainfall). The crown width of A. galpinii ranged from 5.86 ± 0.24 m at high density to 6.56 ± 0.25 m in low-density plots. The difference in crown width among densities was significant (p = 0.0406). Diameter at breast height ranged between 10.4 ± 0.68 cm at high density to 12.5 ± 0.64 cm in low-density plantings and was significantly different among spacings (p = 0.0003).

Keywords: Acacia galpinii; Faidherbia albida; indigenous trees

Southern Forests 2008, 70(3): 205–213

AJOL African Journals Online