Atmospheric pollen counts of ceder(cryptomeria japonica) and cypress(chamaecypanis obtsusa) in Yanai city, Yamaguchi prefecture, Japan.
10.2185/jjrm.37.92
- VernacularTitle:山口県柳井市におけるスギおよびヒノキ花粉の飛散状況
- Author:
Keiko NISHIKAWA
;
Masutoshi NISHIKAWA
;
Satoru KANDA
;
Akiko TAKAMURA
- Publication Type:Journal Article
- From:Journal of the Japanese Association of Rural Medicine
1988;37(2):92-95
- CountryJapan
- Language:Japanese
-
Abstract:
The atmospheric pollen counts of Ceder (Cryptomeria japonica) and Cypress (Chamaecypanis obtsusa) were measured with Durham's standard devices installed on the roofs and ground in Yanai city, Yamaguchi prefecture, during the period between 1984 and 1987, and the following results were obtained.
1) The number of atmosphreic pollen counts changed significantly every year. There was a large quantity of pollen counts recorded in 1984 and 1986, but a small quantity in 1985 and 1987. 2) Scattering period of atmospheric pollen counts also changed every year. In 1987 the atmospheric pollen began early in February. In 1985 and 1986, it began in late February and in 1984 in late March.
3) The atmospheric pollen counts on the roofs were recorded 3 times as much as those on the ground. But there were no substantial difference between those on the roofs and ground concerning the scattering peroid of atmospheric pollen and the daily change of it's counts. There was observed significant correlation between those on the roofs and ground.(coeffecient of multiple correation=0.987)
