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Plant Sociology numero 54 (1) S1

pag. 29-32: Assessing the quality of seedlings in small-scale nurseries using morphological parameters and quality indicators to improve outplanting success

I. Touhami1, A. Khorchani1, M. Bougarradh2, M.T. Elaieb1 & A. Khaldi1

1Laboratory of Management and Valorization of Forest Resources, National Research Institute for Rural Engineering, Water and Forestry, INRGREF. BP 10, 2080, Ariana. University of Carthage, Tunisia.

2Faculté des Sciences de Tunis, Campus Universitaire 2092 - El Manar, Tunis.

doi: 10.7338/pls2017541S1/04

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abstract

In Mediterranean region and especially in North Africa, forest seedlings for reforestation objectives are often produced in small-scale nurseries. The quality of the seedlings influences the success of forest plantation initiatives. This study uses morphological parameters to assess the quality of seedlings of five Tunisian native species (Lavandula dentata, Ruta chalepensis, Laurus nobilis, Capparis spinosa, and Myrtus communis). Some growth parameters like (seedling height, root collar diameter, shoot dry weight and root dry weight) and quality indicators (Root-to-shoot ratio, Sturdiness quotient Root and Dickson quality index) of seedlings produced were compared between some forest Tunisian nursery. The comparison of morphological parameters show significant differences between nurseries (at p=0.05). Seedlings produced in Fernana nursery were uniform in terms of growth characteristics and quality indicators. These differences could be attributed to better environmental conditions and to the quality of substrate used.

keywords

Dickson quality index, forest seedlings, Growth parameters, Root-to-shoot ratio, Sturdiness quotient Root, quality indicators