Ivanov A.V., Kasatkin A.S., Mudrak V.P., Zamolodchikov D.G.
Lesovedenie 2018; (6): 454-463
Allometric relationships between phytomass and taxation diameter have been found for 15 species of wooded plants in stone pine-needle fir forests of Primorsky krai based on direct measurements of phytomass. The tree species having the same diameter had larger than 2-fold differences in aboveground phytomass due to variations in basic density of stemwood, average height and crown form. The relationships have been applied to initial stand taxation data of 15 sampling plots in natural forests with dominant Korean pine (Pinus koraiensis Siebold & Zucc.) and needle fir (Abies holophylla Maxim.) with average age ranging from 50 to 250 years. The storage of raw wood had the best correlation with phytomass (R2 = 0.77). Stand phytomass storage had moderate correlation with the average age of the dominant specie (R2 = 0.31). The latter relationship was represented by logarithmic function leveling off at above 200 years old with accumulation of 300–330 t ha–1 in aboveground phytomass. Carbon sink to aboveground phytomass of the studied stands have been estimated 0.36 t С ha–1 yr–1. It was similar to the value which have been estimated with the ROBUL framework applied to stone pine forests in Ussuriysk forestry. Based on forest survey data and the conversion relationship with the storage, the phytomass of aboveground compartments of tree stands have been estimated 1.30 ? 106 t for the stone pine forests growing on Primorskaya State Academy of Agriculture forest site of an area 6837 ha. Average phytomass of tree stands on the sampling plots appeared to be 17% higher than on the Primorskaya State Academy of Agriculture forest site due to methodical differences between taxation and guidelines to forest survey.
