Fine-root biomass and morphology in scots pine Pinus sylvestris L. young stands
2011
Bardulis, A., Latvia Univ. of Agriculture, Jelgava (Latvia);Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Jansons, A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia)) | Liepa, I., Latvia Univ. of Agriculture, Jelgava (Latvia)
In the summer 2010, a study of the below-ground biomass of young (12 - and 14-year-old) Scots pine Pinus sylvestis L. stands was carried out in central Latvia. The fine-root (diameter is less than 2 mm) biomass, tips, length and volume were determined for the mineral soil layer (0 – 60 cm) by core sampling. The main objective was to determine the average fine-root biomass and morphological characteristics in different classes of young stands of Scots pines. The mean fine-root biomass was calculated for the whole stand by using below-ground biomass measurements of different components of sample trees and measurement of the tree stand. The amount of dry fine-root biomass in the soil layer was 5.3 ± 1.6 t haE-1 in the 14-year-old stand and 3.6 ± 1.5 t haE-1 in the 12-year-old stand. The study showed that the largest portion (52%) of the total fine-root biomass of 12 - and 14-year-old Scots pine stands was located at a depth of 0–10 cm, decreasing in deeper mineral soil layers. The average morphological characteristics of fine roots were higher in the older stand. Analysis of the morphology of fine roots showed that at soil depth of 0 – 10 cm the mean root length was 233 ± 44 cm, volume – 1.3 ± 0.6 cm3, value of tips – 537 ± 104 and diameter – 0.7 ± 0.1 mm per 100 cmE-3.
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