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Savaiminio medžių atkritimo pušynuose dėsningumų tyrimas / Regularities of tree mortality in pine standsDirsė, Vytautas 09 June 2005 (has links)
There is research of regularity of free tree mortality in various age pine stands, growing in Nbl places in master work. Presented this process’s characteristics- amounts of mortality by the number and volume of the tree. We used absolute and relational parameters of free tree mortality.
An object of work- 20-140 years old pine stands, which is pure, conditionally average growing in Nbl places. Long-time investigation involved pine of the Jonava district and Berezina reserve (Belarus). Information involved free mortality from various literary sources.
Aim- fined a regularity of free tree mortality.
A method of work- Barrel method of forestry research was used in outdoor work’s. Inventory of barrel research was repeated 2-3 times in 4-7 years. Without our got information analyze from barrel research we used a method of met analyze, when various authors information of free tree mortality is united in one based object by the source of literature.
Results of work- Tree mortality research involved 20-140 years old pine, growing in Nbl places. Our investigation and results analysis shows 2-5% trees mortality (per year) registered in pine samplings; 0,3-6% - in mide-aged pine stands; 1-5% - in premature stands; 5-6% trees mortality in mature stands.
Average of size of trees mortality equal: in pine samplings- 4,2 m3/ha per year, in mide-aged stands - 2,7 m3/ha per year, in premature forests - 2,6 m3/ha per year, in mature stands - 2,7 m3/ha per year.
Our appointed average and... [to full text]
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