簡易積算日射計フィルムによるイネ群落の受光態勢の解析   :   An Analysis of Light Intercepting Characteristics in Rice by Using Simple Integrated Solarimeter 

作成者 礒田, 昭弘, 吉村, 登雄, 石川, 敏雄, 中村, 康志, 野島, 博, 高崎, 康夫
作成者 (ヨミ) イソダ, アキヒロ, ヨシムラ, タカオ, イシカワ, トシオ, ナカムラ, ヤスシ, ノジマ, ヒロシ
作成者の別表記 ISODA, Akihiro, YOSHIMURA, Takao, ISHIKAWA, Toshio, NAKAMURA, Yasushi, NOJIMA, Hiroshi, TAKASAKI, Yasuo
日本十進分類法 (NDC) 620
内容 色素の退色率から日射量を測定する簡易積算日射計フィルムを用い, 草型の異なるイネ群落の受光態勢の差異について検討した.用いた品種はシンレイ(短稈穂数型)と玉錦(長稈穂重型)で, 調査は8月11, 12日(第1回)および8月30, 31日(第2回)に行った.1.第1回調査時では, 玉錦に比ベシンレイが最上層の平均受光量, 最大値, 最小値が大きかったが, 次層では両品種とも大きな差異はなかった.2.第2回調査時では, 最上層で玉錦に比ベシンレイの方が平均受光量, 最大値, 最小値とも大きかった.第2層以下では, シンレイの平均受光量, 最大値は徐々に小さくなったが, 玉錦では平均受光量はすべて2MJ/m^2/2days未満となった.両調査時とも玉錦に比ベシンレイは, 光を効率よく受光しているものと考えられた.3.両調査時とも群落内相対照度に比べ全天日射量に対する平均受光量割合は, 両品種で群落上層部は小さくなった.第1回調査時の玉錦, 第2回調査時のシンレイの下層部では, 逆に平均受光量割合の方が若干大きくなった.
Light intercepting characteristics of two typically different plant types in rice were examined by using the simple integrated solarimeter. This solarimeter is a piece of the film, which can measure radiation by remaining percentages of dye after the exposure to radiation (Fig. 1). This sensor has several benefits compared with usual measuring instruments, which are to be 1) unnecessary of any electric sources, 2) cheap and mass-productive easily, 3) suitable to integrate solar radiation for a day to a few days, 4) easy to deal in out-door, 5) possible to use on a leaf surface because of its small size (12mm×35mm) and light weight (70mg), and 6) possible to use in many points at the same time (Fig. 2). Shinrei (short-culmed and panicle number typed cultivar) and Tamanishiki (long-culmed and panicle weight typed cultivar) were used in this experiment. After planting, plants were transplanted to 1/5000a Wagner pots as one plant per pot, and were arranged as 33 pots per m^2. Experiments were done on 11, 12 August (before heading) and 30, 31 August (after heading) in 1988. Sensor films were put on every leaf surface at the 20cm (11, 12 August) and 10cm (30, 31 August) height intervals for one plant of each cultivar. On 11, 12 August, Shinrei had larger values than Tamanishiki in the mean, the maximum and the minimum values of intercepted radiations on leaf surfaces at the uppermost layer (Shinrei 50cm, Tamanishiki 70cm). At the second layer from the uppermost layer, there was no marked difference in these values between the two cultivars (Table 1, Fig. 3). On 30, 31 August, the mean, the maximum and the minimum values of intercepted radiations for Shinrei were larger than those for Tamanishiki. At the layers lower than the second layer, however, the amounts of intercepted radiations for Tamanishiki were less than 2MJ/m^2/2days, while those for Shinrei decreased gradually toward the basal layer (Table 2, Fig. 4). Shinrei also showed larger mean values of intercepted radiations on total leaf surfaces than Tamanishiki

公開者 千葉大学園芸学部
コンテンツの種類 紀要論文 Departmental Bulletin Paper
DCMI資源タイプ text
ファイル形式 application/pdf
ISSN 0069-3227
NCID AN00142658
掲載誌情報 千葉大学園芸学部学術報告 Vol.43 page.39-43 (19900200)
情報源 The technical bulletin of Faculty of Horticulture, Chiba University
言語 日本語
著者版フラグ publisher

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