Impact of canopy of Tooth Brush tree (Salvadora persica) as a nurse plant on primary establishment of forest trees and shrubs

Document Type : Research Paper

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Abstract

This research is carried out in Salvadora persica habitats of Sudano-Dekanian sub-region in Hormozgan province, south of Iran.  Five habitats were chosen and 15 plots each containing more than three Salvadora trees were established. Tree number per ha, crown diameter and suckers number of Salvadora trees as well as some characteristics of associated trees and shrubs (total number, number of plants under and out of canopy and diversity of the associated trees and shrubs of Salvadora) were studied within the plots. Totally 68 Salvadora trees were studied quantitatively. Generally, Salvadora habitats in Hormozgan province had 39- 61 tree/ha, crown diameter 6.6 - 9.3 meter and suckers number 15.8- 84.5 within the plot. Total number of associated trees and shrubs were 8.8- 60.4, number of plants under canopy 3.1- 32.4 and out of canopy 3.3- 49.3 and diversity of the associated trees and shrubs of Salvadora 1.7- 5.9 species within the plot. Generally, 14 species of trees and shrubs were associated with Salvadora; just 6 species (Ephedra foliata, Lycium shawii, Suaeda fruticosa, Ziziphus spina-christi, Prosopis koelziana and P. cineraria) were recognized under the canopy of Salvadora trees. Ephedra foliata was observed only under canopy, but other species were observed either under or out of canopy of Salvadora trees. Suaeda fruticosa (85.4 %) and Lycium shawii (79.3- 100 %) were observed more under the canopy, while Ziziphus spina-christi (0- 54.6 %), Prosopis koelziana (0- 52.4 %) and P. cineraria (0- 50 %) were almost observed similarly under and out of the canopy of Salvadora trees

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History

  • Receive Date: 22 October 2008
  • Accept Date: 09 March 2009

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