Study

Effects of ground preparation and microenvironment on germination and natural regeneration of Juniperus procera and Afrocarpus gracilior in Ethiopia

  • Published source details Sharew H., Legg C.J. & Grace J. (1997) Effects of ground preparation and microenvironment on germination and natural regeneration of Juniperus procera and Afrocarpus gracilior in Ethiopia. Forest Ecology and Management, 93, 215-225.

Actions

This study is summarised as evidence for the following.

Action Category

Remove woody debris after timber harvest

Action Link
Forest Conservation

Use soil scarification or ploughing to enhance germination

Action Link
Forest Conservation
  1. Remove woody debris after timber harvest

    A replicated, controlled study in 1992 in Afro-montane forests in Ethiopia (Sharew, Legg & Grace) found that woody debris treatments had mixed effects on seedling establishment of African Juniper Juniperus procera and East African yellowwood Afrocarpus gracilior trees. Seedling density (individuals/m2) of African juniper was higher in burned than control and similar to both in raked plots (control: 0-5; raked: 8-12; burned: 13-14), while seedling density of East African yellowwood was lower in burned than control and raked plots (control: 4; raked: 5; burned: 1-3). Data were collected in December 1992 in three plots (10 × 10 m) of each treatment: control, raked (all logging waste and ground vegetation removed, seedbed raked) and burned (logging waste, ground vegetation and litter burned). Plots were established in a 40 × 40 m study site in March-April 1992

  2. Use soil scarification or ploughing to enhance germination

    A replicated, controlled study in 1992 in Afro-montane forests in Ethiopia (Sharew, Legg & Grace 1997) found that ploughing after clearcutting increased seedling establishment of African juniper Juniperus procera but not of East African yellowwood Afrocarpus gracilior trees. Seedling density of African juniper (control: 0-13; ploughing: 5-14 individuals/m2) was higher in ploughing, while density of East African yellowwood (control: 1-5; ploughing: 3-5) was similar between treatments. Data were collected in December 1992 in three pairs of control and ploughing (ploughed to 30 cm depth and raked) subplots (1 × 2 m) in each of nine plots (10 × 10 m) established in a clear-felled site (40 × 40 m) in March-April 1992.

     

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