Stocking Diagrams for Silvicultural Guideline in Korean Pines and Japanese Larch
Lee, Daesung; Choi, Jungkee (2020)
Lee, Daesung
Choi, Jungkee
Julkaisusarja
Forests
Volyymi
11
Numero
8
Sivut
17 p.
MDPI AG
2020
Julkaisun pysyvä osoite on
http://urn.fi/URN:NBN:fi-fe20201210100173
http://urn.fi/URN:NBN:fi-fe20201210100173
Tiivistelmä
Appropriate management of stand density is necessary to avoid wasted growing space
and overcrowding-induced self-thinning and therefore to optimize profitability. We developed a
Gingrich-style stocking chart for Korean red pine (Pinus densiflora), Korean white pine (P. koraiensis),
and Japanese larch (Larix kaempferi) in Korea. Datasets for even-aged stands were categorized into
two censored datasets via relative density based on species-specific stand density indices to assign
adequate plots for tree allometry. Censored plot data for maximum density on full stocking were
used to develop A-level stocking based on mean individual tree area. In censored plot data for
minimum density on full stocking, individual trees represented open-grown trees, and a crown
competition factor of 100 was proposed as B-level stocking. Based on parameters estimated from
allometry, stocking diagrams comprising quadratic mean diameter, number of trees, and basal area
were correctly expressed. A-level stocking at the same quadratic mean diameter revealed that Korean
white pine had the most trees and largest basal area, while Japanese larch had the fewest trees and
smallest basal area. In contrast, B-level stocking disclosed that Japanese larch had the most trees and
basal area, whereas Korean white pine had the fewest trees and smallest basal area. The stocking
diagrams suggest that silvicultural treatments for these species should be species-specific.
and overcrowding-induced self-thinning and therefore to optimize profitability. We developed a
Gingrich-style stocking chart for Korean red pine (Pinus densiflora), Korean white pine (P. koraiensis),
and Japanese larch (Larix kaempferi) in Korea. Datasets for even-aged stands were categorized into
two censored datasets via relative density based on species-specific stand density indices to assign
adequate plots for tree allometry. Censored plot data for maximum density on full stocking were
used to develop A-level stocking based on mean individual tree area. In censored plot data for
minimum density on full stocking, individual trees represented open-grown trees, and a crown
competition factor of 100 was proposed as B-level stocking. Based on parameters estimated from
allometry, stocking diagrams comprising quadratic mean diameter, number of trees, and basal area
were correctly expressed. A-level stocking at the same quadratic mean diameter revealed that Korean
white pine had the most trees and largest basal area, while Japanese larch had the fewest trees and
smallest basal area. In contrast, B-level stocking disclosed that Japanese larch had the most trees and
basal area, whereas Korean white pine had the fewest trees and smallest basal area. The stocking
diagrams suggest that silvicultural treatments for these species should be species-specific.
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