首页|Growth Intensity and Height Increment in a Young Hybrid Aspen Stand in Latvia
Growth Intensity and Height Increment in a Young Hybrid Aspen Stand in Latvia
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NETL
Hybrid aspen (Populus tremuloides x Populus tremuld) has a very high productivity and therefore is one of the most promising alternatives for the establishment of plantations on abandoned agricultural lands in Baltic Sea region countries。 In order to ensure selection of appropriate clones for the predicted changes in climatic conditions as well as to forecast possible changes in productivity and risks for hybrid aspen clones used currently， it is essential to obtain detailed knowledge on formation of its increment。 Therefore the aim of the study is to assess the length of the annual height increment， factors affecting it and the pattern of its development。 Results from the hybrid aspen plantation consisting of 15 clones， measured during 4th growing season， reveal， that tree height at the beginning of the vegetation period was a significant factor influencing the length of the height increment (R~2=0。25) and the height growth intensity (R~2=0。22)。 Height increment was slightly longer for early flushing clones (111±5。4cm) than for late-flushing (101±7。1cm)， but was not related to the length of the used vegetation period。 Intensity of the height growth was strongly related to the daily mean temperature (R~2=0。76) and has two peaks - at the beginning of the growth season (end of May) and from middle of July till the end of August。
NETL
