Effects of the Combined Application of Ethephon and Gibberellin on Growth of Rice (Oryza sativa L.) Seedlings(Crop Physiology and Ecology)
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概要
- 論文の詳細を見る
Improvement of early seedling growth, such as seedling emergence and vigor is one of the most important agronomic traits in direct seeding rice cultivation. The effects of two plant growth regulators (PGRs), gibberellic acid (GA_3) and ethephon (ET), on seedling growth under flooded soil conditions at different temperatures and water depths were investigated. The PGRs were applied during the seed soaking process. A single treatment with GA_3 or ET increased seedling growth. However, combined application of GA_3 and ET was more effective than that of GA_3 or ET alone in many cases at both growing temperatures (15 and 20℃). The growth of different organs in the rice seedlings, such as the coleoptiles, first leaves, and second leaves was also increased by PGR treatment. The nitrogen concentration of the shoot and the ratio of shoot dry weight to shoot length did not differ significantly among the treatments. The results of our study show that rice seedling growth in direct seeding cultivation may be improved by treatment with GA_3 and ET in combination.
- 日本作物学会の論文
著者
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Saigusa Masahiko
Field Sci. Center Graduate School Of Agric. Sci. Tohoku Univ.
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Hase Shu
Division Of Life Science Graduate School Of Agricultural Science Tohoku University
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Watanabe Hajime
Field Sci. Center, Graduate School of Agric. Sci., Tohoku Univ.
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Saigusa Masahiko
Field Science Center Graduate School Of Agricultural Science:toyohashi University Of Technology
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Watanabe Hajime
Field Science Center Graduate School Of Agricultural Science
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Watanabe Hajime
Field Sci. Center Graduate School Of Agric. Sci. Tohoku Univ.
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