イースタンガマグラス（Tripsacum dactyloides (L.)L.）の生活環と耐湿性
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概要
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水田において栽培可能なエネルギー作物としての適性を探るために，日本での栽培例のないイースタンガマグラス（EG）の生活環と乾物収量，および根における破生細胞間隙の形成と耐湿性程度を調査した．対照にはスウィチグラス（SG）を用いた．その結果，EGは北部九州でも多年生を示すことが確認され，栽培2年目以降の高い乾物収量が見込まれた．また，EGは土壌の水分条件に関わらず不定根には破生細胞間隙が良く発達し，SGに比べて耐湿性程度は高かった． 以上のことから，イースタンガマグラスは湛水田において栽培可能なエネルギー作物の特性を持つことが示唆された．In order to verify the capabilities of Eastern gamagrass (EG), which has never been cultivated in Japan, as an energy crop cultivated in paddy fields, its life cycle, dry matter yield, formation of lysigenous intercellular space in adventitious roots and wet tolerance were examined. Switchgrass (SG) was used as a control plant. In Northern Kyushu, we confirmed EG had characteristics of a perennial plant. Although dry matter yield in the first year was about 1000g/m^2, it is expected that its yield on and after the second year will be much higher because of the result in pot experiment where the dry matter yield per pot in the second year was 5 times as much as that in the first year. In EG plant, rate of lysigenous intercellular space of adventitious roots was high regardless of soil moisture conditions and wet tolerance was higher than that in SG plant. These results suggested that EG was capable as an energy crop cultivated in paddy field in Japan.
- 2003-03-27
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