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        검색결과 3

        1.
        2007.11 KCI 등재 서비스 종료(열람 제한)
        Illicium anisatum was bred under four different light intensity. Those condition were full sunlight(PPFD 1600μmol m-2 s-1), 30% treatment(PPFD 400 μmol m-2 s-1), 50% treatment(PPFD 250 μmol m-2 s-1) and 70% treatment(PPFD 100 μmol m-2 s-1), respectively. Chlorophyll a and b were increased according to decrease of light intensity. Thirty percent and 50% treatment had not significant different in chlorophyll a and b. Thirty percent treatment was shown the best photosynthetic activity through invested photosynthetic rate, intercellular CO2 concentration and water use efficiency. Photosynthetic activity trend of 50% treatment was similar to 30% treatment. Seventy percent treatment was shown the best photosynthetic activity at low light intensity but that was decreased to lower value than 30% and 50% treatment under high intensity. Control, bred full sunlight, was shown the worst photosynthetic activity at measured all light intensity. That result could imply that was caused by photoinhibition because of long term exposed of shade tolerant plant at high light intensity. Leaf characteristics had not significant different in leaf length, width and area but leaf dry weight had similar trend to photosynthetic activity.
        2.
        2007.03 KCI 등재 서비스 종료(열람 제한)
        Male and female strobilus production was assessed annually over a five-year period for a clonal seed orchard of sugi (Cryptomeria japonica D. Don) in Korea. Clonal fertility and fertility variation, expressed by both sibling coefficient and coefficient of variation in strobilus production among 40 orchard clones, were reported. Fertility varied among clones and among years, producing five-year averages per ramet of 464.3 and 971.1 for female and male strobili, respectively. The correlation between female and male strobilus production was positive in each of the five years studied and statistically significant with the exception of one poor flowering year. The clonal status number (Ns), a measure of genetic diversity, was calculated based on the observed clonal fertility variation, varying from 27.6 (N = 40) in the poorest flowering year (2002) to 35.8 in the best year (2005). On average (pooled), the relative status number was 95% of the census number (N). Variation of female fertility was higher than that of male fertility for the five consecutive years, and the status numbers of female and male parents reflected this variation. The pooled Ns estimation from all five years was higher than any single year, implying that genetic diversity would increase when seeds collected from different years are pooled. Sexual asymmetry calculations showed that clonal contributions would be balanced between genders
        3.
        2006.10 KCI 등재 서비스 종료(열람 제한)
        Using the principal component analysis and clustering Forest resources are consistently necessary in the future. It takes much time to produce and breed them. However it is difficult to do due to recent social situation. Considering global environment, forest policy should be considered as a global scale rather than a regional one. At least, the policy needs a national scale concern. In order to support forestry, elementary data are needed. In this study, forest characteristics in Ishigawa-gen province have been analyzed through main component analysis and clustering. The results are shown in fig.5 and fig.6.