@article{oai:kpu.repo.nii.ac.jp:00005235,
 author = {齋藤, 秀樹 and Saito, Hideki},
 journal = {京都府立大學學術報告. 農學, The scientific reports of Kyoto Prefectural University. Agriculture},
 month = {Dec},
 note = {生育期に異常な少雨高温であった1994年には大量のスギ雄花芽が分化し, 翌春には莫大な花粉を放出した。1994年7月∿1995年7月までの期間, リタートラップを12林分に設置して未開花および開花雄花量を調査した。老齢および高齢林のなかに, 秋季から冬季にかけて未開花雄花の大量落下がみられた。この雄花の大部分は花粉を形成していない発育不全のもので, この落下は未開花雄花の落下の少ない林分でも同様に認められた。この発育不全雄花の落下は秋季に集中する林分と冬季のものとがあった。未開花雄花数の割合が高い林分では, 花粉を含めた雄性器官への同化産物の投資が300∿350g/m^2 (3∿3.5t/ha)に達していた。老齢および高齢林にみられるこの大きな投資から判断すると, 未開花雄花の大量落下は雄性器官への投資を軽減するための雄花の間引きであることが示唆された。また, 生育期の水分ストレスがこの資源制限に相乗的にはたらいたと考えられた。, Great numbers of male flowers of Sugi, Cryptomeria japonica D. DON., were formed in 1994 due to abnormally hot and dry weather during the growth period, and a great multitude of pollen grains were released in March of the following year, 1995. We studied the yield of buds of male flowers before anthesis and that of open male flowers after anthesis, or pollen release, in 12 stands using litter traps during the period from July 1994 to July 1995. Great numbers of flower buds that had fallen in autumn and winter were recognized in an old stand about 600 years old and three mature stands about 95 years old, having no relationship to the number of open flowers in a stand. Most fallen flower buds were aborted, irrespective of the number fallen in a stand. Most flower buds that were part of the heavy fall had aborted pollen grains. In the old and three mature stands showing a high percentage of fallen flower buds, photosynthates invested in male organs including pollen attained 300-350g/m^2 (3-3.5t/ha). These results suggest that flower buds are thinned in order to save investment of photosynthates in male organs. The fall of male flower buds caused by abortion can be amplified by both the resource limitation mentioned above and water stress due to abnormal weather and a tree height of 35-50m above the ground.},
 pages = {39--47},
 title = {スギ雄花の開花前の大量落下; 1994 年生育期の異常な少雨高温の影響(林学)},
 volume = {48},
 year = {1996},
 yomi = {サイトウ, ヒデキ}
}