Resource Details

Effect of nursery practices on seedling survival and growth of selected Miombo tree species, Morogoro, Tanzania

Literature: Journal Articles Available at NO COST

Vyamana, V.G., Chamshama, S.A.O. & Mugasha, A.G. 2007, "Effect of nursery practices on seedling survival and growth of selected Miombo tree species, Morogoro, Tanzania", Discovery and Innovation, vol. 19 nos. 1&2, pp. 122-138.

Contact Info

S.A.O Chamshama, schams@suanet.ac.tz, chamstz@yahoo.com

Affiliations

  • Sokoine University of Agriculture, Faculty of Forestry & Nature Conservation, Department of Forest Biology, Morogoro, Tanzania.

Link(s)

Species Info

  • Albizia harveyi
  • Albizia versicolor
  • Diplorhynchus condylocarpon
  • Pericopsis angolensis
  • Pterocarpus angolensis

Description

  • This study investigates the effects of shade, polythene diameter and tube height and soil mixtures on seedling survival and growth of five Miombo tree species in Morogoro, Tanzania.
  • For each species, two nursery experiments were carried out. That is a) degree of shading, pot diameter and height trial, which adopted a split-split plot design with three replications and b) nursery soil mixtures adopted a completely randomized block design with three replications. The treatments for shading were open area (S0), shaded area (S1); levels of polythene tube lay flat diameter (D0 = 10 cm, D15 = 15 cm, D20 = 20 cm) and heights of polythene tube (H0 = 10 cm, H15 = 15 cm, H20 = 20 cm) and 3 soil mixtures.
  • The results showed that shading significantly improved the survival of only D. condylocarpon and P. angolensis and slightly improved seedling survival for the rest the species, though not significantly. The effects of polythene tube significant at the early stages, later stages and and throughout the assessment period for A. harveyi and P. angolensis, D. condylocarpon and Pterocarpus angolensis respectively. With the exception of D. condylocarpon and P. angolensis, seedling survival tended to increase with increasing polythene tube diameter throughout the assessment period.
  • Polythene tube height had no significant effects on seedling survival. However, the effects of shade and polythene tube diameters had profound effects on seedling survival. Growing seedlings under bamboo shade improved seedling diameter and height, though not always statistically significant in this study. The exception was D. condylocarpon, where diameter growth was the same for seedlings grown under shade and under direct sunlight with slight improvement in height growth under shade.
  • In conclusion this study indicated a strong relationship between shading and polythene tube size on development of Miombo tree species. While shade was important for all species, the most important effect was polythene tube diameter and its derivative-seedling growth density.
  •  Although large diameter pots appeared to be the best, they require more soil, labor to fill and occupy a large space in nursery. It is important that medium sized pots are used and Miombo species be raised under a light shade. Soil mixtures consisting 0.25:0.25:1 sand: cow manure: soil and 0:0:1 sand: cow manure: soil were optimal for A. harveyi and all of the other species, respectively.

Geographical Region

  • East Africa
  • Ecosystems

    Country

  • Tanzania
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