@article{oai:kpu.repo.nii.ac.jp:00005144,
 author = {齋藤, 秀樹 and Saito, Hideki and 井坪, 豊明 and Itsubo, Toyoaki and 竹岡, 政治 and Takeoka, Masaji},
 journal = {京都府立大學學術報告. 農學, The scientific reports of Kyoto Prefectural University. Agriculture},
 month = {Nov},
 note = {京都盆地をとりまく低山帯のシイ5林分を対象にして1982,83年の林分あたり雄花, 花粉, 果実の生産量(乾重と個数)をトラップ法で調査し, 開花&acd;種子散布の過程を解析した。花粉生産量は既報4樹種より多く, 粒数では2.6×(10)^<14>ha^<-1>y^<-1>を記録した。雄花の生産量は林分の生育段階の進行に伴い増加するが, 果実にはこの傾向が認められない。生殖器官全体の生産量は10資料のすべてが1t ha^<-1>y^<-1>をこえ, うち3林分は3&acd;5.5t ha^<-1>y^<-1>に達した。1982年開花に由来する生殖器官部分の乾物割合は雄性 : 雌性が1 : 1の3林分と1 : 3の2林分にわかれ, この関係は花粉粒数P/め花数Fの比によって整理できた。前者3林分のめ花数には2倍の較差があるが結実率(21%)は等しかった。P/F比が前者の半分しかない後者2林分では結実率が高い林分(31%)と低いもの(17%)とがあった。若い林分ではP/F比が小さいが, 結実率は高い傾向がみられる。シイ種子生産を決定する要因にはめ花数と結実率の二つが認められた。, Annual production rates (per 1-ha stand; by dry weight and number) of catkins, pollen and fruits of five chinkapin (Castanopsis cuspidata SCHOTTKY) stands in the mountain zone around the Koyto Basin were measured in 1982 and 1983 using litter traps, and analyzed from the process of flowering to seed dispersal. The pollen production rates were larger than those of the four species previously reported, i.e., Japanese red pine, Cryptomeria, Chamaecyparis and Siebold walnut; the maximum value reached 2.4×(10)^<14> grains/ha・y. Catkin production increased with developing growth stage of stands, while fruit production varied among stands. Ten estimations (five stands in two years) of the production rates of all reproductive organs including pollen showed values of over 1t/ha・y, in which all six estimations for three stands amounted to between 3 and 5.5t/ha・y. The distribution ratio of male and female organs within the total dry matter production of parts derived from flowering in 1982 was 1 : 1 for three Stands B, D and E, and 1 : 3 for two Stands A and C, corresponding to the ratio of the number of pollen grains (P) to female flowers (F). In the former stands, a two-fold difference in the numbers of female flowers was recognized, while there was no difference in the seed-maturing ratio (21%), i.e., the proportion of female flowers developing into ripe and sound nuts. Of the latter stands having half the P/F Ratio of the former, young Stand A showed a high ratio (31%) while Stand C showed a low ratio (17%). It was concluded that the seed-maturing ratios in mature stands are related to the P/F Ratio, while in young stands, the former tends to be high in spite of a low P/F Ratio.},
 pages = {26--39},
 title = {シイ林における生殖器官各部の生産量と種子生産に影響する要因(林学部門)},
 volume = {39},
 year = {1987},
 yomi = {サイトウ, ヒデキ and イツボ, トヨアキ and タケオカ, マサジ}
}