STUDIES ON THE PREDICTION OF THE ANNUAL TOTAL POLLEN COUNT OF SUGI (CRYPTOMERIA JAPONICA D.DON)

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  • スギ花粉空中飛散総数の予測
  • スギ カフン クウチュウ ヒサン ソウスウ ノ ヨソク

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Attempts to predict the annual total airborne sugi pollen count were made by studying the relationship between meteorological factors and the annual total airborne sugi pollen count per cm^2 in Sagamihara city for the last 15 years. Of meteorological factors examined, the mean relative humidity in July had the closest correlation to the annual total airborne sugi pollen count of the subsequent year. When the mean temperature in July was above 23.9℃, the correlation between the mean humidity in July and the annual total airborne Sugi pollen count in the subsequent year was highly significant(r=-0.95, p<0.001, n=9). The formula for predicting the annual total airborne sugi pollen count in Sagamihara city was as follows; Y=-330X+28336(Y: annual total airborne sugi pollen count in the subsequent year X: mean humidity in July(applicable only for the above restriction of mean temperature)) When the mean temperature in July was below 23.6℃, the total airborne sugi pollen count in the subsequent year could be expected to be less than the mean value of the annual total sugi pollen count. The correlation between the meteorological factors in the period of sugi pollination and the annual total airborne sugi pollen count in the same year was low.

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