Growth and productivity of planted black alder stands
2000
Vares, A. (Estonian Agricultural Univ., Tartu (Estonia). Faculty of Forestry)
The problem of cultivation of deciduous trees has become quite urgent in the North-Europe in recent years. Changes have taken place also in the Estonian forestry policy where coniferous trees are no longer considered as the priority area, and deciduous trees have become valuable in nature-friendly forest management. Besides other fast-growing tree species it would be appropriate to use the black alder (Alnus glutinosa (L.) Gaertn.) for plantation. The present paper is based on a data of three 21-year old experimental plantations of black alder. The growth and productivity of experimental plantation were investigated. The amount of biomass and annual above-ground net production were evaluated. In experimental plantations amount of biomass ranged between 88,8-100,6 t/ha and annual aboveground net production 14,3-17,1 t/ha*yr. Tree trunks formed 86 per cent of above-ground biomass and 61 per cent of annual net production. Also leaf size, specific leaf area and leaf area per weight were analysed. Average values of 30,8 square cm for leaf size, 13,4 plus minus 0,12 square m/kg for specific leaf area and 79,9 plus minus o,64 g/ square m for leaf area per weight were estimated. The results show that black alder is a fast growing tree species and it would be suitable for afforestation of different lands in Estonia
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