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トチノキ林の再生産器官の生産量 : とくに花粉と種子について(林学部門)
https://kpu.repo.nii.ac.jp/records/5183
https://kpu.repo.nii.ac.jp/records/5183aa32d286-4124-4e09-bba3-f49ac8f3d121
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00000079182.pdf (1.1 MB)
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| Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-02-20 | |||||
| タイトル | ||||||
| タイトル | トチノキ林の再生産器官の生産量 : とくに花粉と種子について(林学部門) | |||||
| 言語 | ja | |||||
| その他（別言語等） | ||||||
| その他のタイトル | Production rates of reproductive parts in Aesculus turbinata forests, with special reference to pollen and seeds (Forestry) | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ | departmental bulletin paper | |||||
| 著者 |
齋藤, 秀樹
× 齋藤, 秀樹× 井坪, 豊明× 神田, 信行× 小川, 享× 竹岡, 政治 |
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| 抄録(日) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 大形種子をもつ樹種では再生産器官にどれほどの同化産物が流れるのか, 虫媒花樹種は花粉が少ないのかなどを明らかにする目的で, 京都府芦生のトチノキ2林分で6年間の調査を行なった。主な結果は次の通りである。(1)花粉を含めた生産量合計は, 豊作に2t/ha・yr, 平均1.2t/ha・yr程度, 0.5t/ha・yrが凶作の値である。合計値は他の樹種に比べて多くはないが, 種子では多い部類にはいる。(2)乾物生産の配分は, 凶作年(40%)を除くと, 雌性に集中する(65～85%)。(3)雄花, 両性花の開花数の年次変動は小さい。(4)雄花と両性花の性比には林分差があり, 0.013～0.037と0.048～0.085である。(5)開花前の1雄花に含有する花粉量は246～321×(10)^3個, 1.56～1.88mgである。(6)1雄花の花粉量に林分開花数を掛けて推定した林分の花粉生産量は, 年により5.29～12.7(平均9.13)×(10)^<12>/ha・yr, 32.0～87.4(同55.9)kg/ha・yrになる。他の林分は, これらの値より20%少ない。(7)トチノキ林の花粉数は風媒花樹種にほぼ等しいか, むしろ多い。(8)種子の豊作は両性花の多い年に起こる。高い結実率も豊作の原因の一つとなる。結実率は, 例外の1年があるが, 花粉数の多少と並行して推移する。胚珠1個の形成に準備された花粉数は1.3～3.2×(10)^6,他の林分はこの1/2である。 | |||||
| 言語 | ja | |||||
| 抄録(英) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | To determine the amount of photosynthates flowing to reproductive parts in trees bearing large and heavy seeds and whether insect-pollinated trees produce less pollen than wind-pollinated trees, a six-year study was done in two horse chestnut (Aesculs turbinata BLUME) forests at Ashiu, Kyoto prefecture. The main results were as follows. (1) Annual production rates of all reproductive parts were 2t/ha・yr for a mast year, about 1.2t/ha・yr on average, and 0.5t/ha・yr for poor fruiting. The production rates for horse chesnut were not as high as the values for other trees such as beech and chinquapin. In terms of seeds alone, horse chestnut appears to be one of the most productive trees. (2) Dry-matter production was concentrated on female parts (65-85%) derived from hermaphrodite flowers, except in poor crop years (40%). (3) Small annual fluctuations in the numbers of both male and hermaphrodite flowers were recognized. (4) There were differences between stands in the sex ratio (ratio of number of hermaphrodite flowers to total), being 0.013-0.037 for one stand and 0.048-0.085 for the other. (5) Flowers before anthesis had 246-321×(10)^3 pollen grains and a weight of 1.56-1.88mg. (6) Pollen production rates estimated by multiplication of the total number of flowers produced in a 1-ha stand by the amount of pollen per flower before anthesis were in the range of 5.29-12.7 (mean : 9.13)×(10)^<12> grains/ha・yr and 32.0-87.4 (mean : 55.9)kg/ha・yr. The other stand produced 20% less than these values. (7) Numbers of pollen grains produced by insect-pollinated horse chestnut were approximately equal to or more than those of wind-pollinated trees. (8) Mast fruiting occurred in years of good hermaphrodite flower crop, and was partly brought about by high seed-maturing ratios (numerical ratio of mature seeds to hermaphrodite flowers). Year-to-year trends in seed-maturing ratios parallelled pollen production, except in one year. Numbers of pollen grains scattered per ovule or ratios of pollen grains to ovules were in the range of 1.3-3.2×(10)^6 for one stand and half of this value for the other. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 京都府立大學學術報告. 農學 en : The scientific reports of Kyoto Prefectural University. Agriculture 巻 42, p. 31-46, 発行日 1990-11-19 |
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| 雑誌書誌ID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00062275 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 00757373 | |||||
