%0 Journal Article
%T Relationship between Phenological Stages and Cumulative Air Temperature in Spring Time at Namsan
%A Min
%A Byeong Mee
%A Dong Hoon Yi
%A Sang Jin Jeong
%J Journal of Ecology and Field Biology
%D 2007
%I 
%X To certify predictability for the times of phenological stages from cumulative air temperature inspringtime, the first times of budding, leafing, flower budding, flowering and deflowering for 14 woody plants weremonitored and air temperature was measured from 2005 to 2006 at Namsan. Year day index (YDI) andNuttonson's Index (Tn) were calculated from daily mean air temperature. Of the 14 woody species, mean coefficientof variation was 0.04 in Robinia pseudo-acacia and 0.09 in Alnus hirsuta. However, mean coefficient ofvariation was 0.30 in Forsythia koreana and Stephanandra incisa and 0.32 in Zanthoxylum schinifolium. Therefore,the times of each phenological stage could be predicted in the former two species but not in latter threespecies by two indices. Of the five phenological stages, mean coefficient of variation was the smallest at defloweringtime and the largest at budding time. In five phenological stages, mean coefficient of variation of YDIwas in the range of 0.11กซ0.21 but that of Tn was in the range of 0.15กซ0.26. Therefore, the former was a betterindex than the latter. Of the species-phenological stage pair, coefficient of variation of YDI was 0.01 in Acerpseudo-sieboldianum - flower budding and below 0.05 in 11 pairs, whereas the YDIs over 0.40 were 4 pairscomprising of Prunus leveilleana - budding (0.51). Coefficient of variation of Tn was 0.01 in A. hirsuta - buddingand below 0.05 in 8 pairs. The Tns over 0.40 were 5 pairs comprising of F. koreana - flower budding (0.66).
%K Budding
%K Deflowering
%K Flowering
%K Leafing
%K Nuttonson's Index (Tn)
%K Phenology
%K Woody plant
%K Year day index
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