[논문]Reproductive Maturity Onset and Tree Size in a Garcinia kola (Heckel) Coastal Humid Tropical Climate Plantation

Henry Onyebuchi Okonkwo; Olubunmi Ayokunle Koyejo; Joseph Okechukwu Ariwaodo; Nsien Iniobong Bruno

doi:10.7747/jfes.2023.39.2.73

[국내논문] Reproductive Maturity Onset and Tree Size in a Garcinia kola (Heckel) Coastal Humid Tropical Climate Plantation 원문보기

Journal of forest and environmental science, v.39 no.2, 2023년, pp.73 - 80

Henry Onyebuchi Okonkwo (Swamp Forest Research Station, Forestry Research Institute of Nigeria) , Olubunmi Ayokunle Koyejo (Swamp Forest Research Station, Forestry Research Institute of Nigeria) , Joseph Okechukwu Ariwaodo (Swamp Forest Research Station, Forestry Research Institute of Nigeria) , Nsien Iniobong Bruno (Swamp Forest Research Station, Forestry Research Institute of Nigeria)

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Little is known of the life history of Garcinia kola; the objective of this study, therefore, was to assess the fruiting age and tree size of the species in a coastal humid tropical climate plantation condition. A total 103 trees were used in the study viz; 80 ten-year-old trees at reproductive maturity onset and 13 thirty-year-old trees with several cycles of reproduction that constitute two independent variables. Data collected were age of onset of flowering and size at reproductive maturity onset. Relative size at reproductive maturity onset (RSOM) was estimated as size at reproductive maturity onset (SOM) divided by asymptotic maximal size (AMS). Data analysis was conducted using pairwise t-test and principal component analysis (PCA). Reproductive maturity onset (flowering) was recorded in the ten-year-old stand eight (8) years after planting. Mean size at reproductive maturity onset (SOM) was height 5.32±1.7 m, dbh 0.11±0.03 m, total number of branches was 29.6±7.3, crown depth 5.24±1.05 m, crown diameter was 4.78±0.7 m, branch diameter 0.098±0.01 m, leaf length 0.13±0.02 m, leaf breadth 0.37±0.01 m, twig length 0.35±0.11 m and leaf per twig 6±0.84 and asymptotic maximal size (AMS) was height 19.85±0.76 m, dbh 0.95±0.09 m, total number of branches 62±5, crown depth 18.83±0.7 m, crown diameter 12.5±1.64 m, branch diameter 0.5±1.6 m, leaf length 0.16±0.023 m, leaf breadth 0.45±0.12 m, twig length 0.37±0.11 m and leaf per twig 19±7.5. Pairwise t-test analysis showed there was significant differences between SOM and AMS in all growth factors except leaf length, leaf breadth, and twig length. Highest relative size at reproductive maturity onset (RSOM) was recorded in leaf length 0.82, twig length 0.82, and leaf breadth 0.80, while, the lowest was branch diameter 0.11. Four components out of the total of eleven were extracted to explain the relationship in RSOM: Principal component one (PC1) explained 37.23%; PC2 26.4%, PC3 22.73%, and PC4 13.64%.

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표/그림 (5)

그림 Fig. 1. Principal components and eigen values of relative size at re-productive maturity onset of Garcinia kola.
표 Table 1. Size at reproductive maturity onset (SOM), asymptotic maximal size (AMS), coefficient of variation and relative size at reproductive maturity onset (RSOM)
표 Table 2. Pairwise t-test comparison of size at reproductive maturity onset (SOM) and asymptotic maximal size (AMS)
표 Table 3. Principal components and communality factor of relative size at reproductive maturity onset (RSOM)
표 Table 4. Principal components and percentage explained variation

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[국내논문] Reproductive Maturity Onset and Tree Size in a Garcinia kola (Heckel) Coastal Humid Tropical Climate Plantation 원문보기

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[국내논문] Reproductive Maturity Onset and Tree Size in a Garcinia kola (Heckel) Coastal Humid Tropical Climate Plantation 원문보기

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