| 著者 |
松波, 麻耶
| ja |
松波, 麻耶(Personal)
岩手大学
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| en |
MATSUNAMI, Maya(Personal)
Iwate University
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Search repository
熊地, 智也
| ja |
熊地, 智也(Personal)
岩手大学
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| en |
KUMACHI, Tomoya(Personal)
Iwate University
|
Search repository
岡部, 幸喜
| ja |
岡部, 幸喜(Personal)
株式会社コンマ製作所
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| en |
OKABE, Kohki(Personal)
Konma Co.,Ltd.
|
Search repository
坂田, 敦
| ja |
坂田, 敦(Personal)
株式会社コンマ製作所
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| en |
SAKATA, Atsushi(Personal)
Konma Co.,Ltd.
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Search repository
及川, 聡子
| ja |
及川, 聡子(Personal)
青森県産業技術センター農林総合研究所
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| en |
OIKAWA, Satoko(Personal)
Aomori Prefectural Industrial Technology Research Center
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Search repository
多田, 周平
| ja |
多田, 周平(Personal)
岩手県農業研究センター
|
| en |
TADA, Shuhei(Personal)
Iwate Agricultural Research Center
|
Search repository
八重樫, 耕一
| ja |
八重樫, 耕一(Personal)
岩手県農業研究センター
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| en |
YAEGASHI, Koichi(Personal)
Iwate Agricultural Research Center
|
Search repository
尾形, 茂
| ja |
尾形, 茂(Personal)
岩手県農業研究センター
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| en |
OGATA, Shigeru(Personal)
Iwate Agricultural Research Center
|
Search repository
佐々木, 周平
| ja |
佐々木, 周平(Personal)
山形県農業総合研究センター
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| en |
SASAKI, Shuhei(Personal)
Yamagata Integrated Agricultural Research Center
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Search repository
小野寺, 博稔
| ja |
小野寺, 博稔(Personal)
宮城県古川農業試験場
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| en |
ONODERA, Hirotoshi(Personal)
Miyagi Prefectural Furukawa Agricultural Experiment Station
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Search repository
渡邉, 洋一
| ja |
渡邉, 洋一(Personal)
福島県南会津農林事務所
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| en |
WATANABE, Youichi(Personal)
Fukushima Prefectural Minamiaizu, Agriculture and Forestry Office
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Search repository
金澤, 優紀
| ja |
金澤, 優紀(Personal)
福島県農業総合センター
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| en |
KANAZAWA, Yuuki(Personal)
Fukushima Agricultural Technology Center
|
Search repository
新妻, 和敏
| ja |
新妻, 和敏(Personal)
福島県農業総合センター
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| en |
NIIZUMA, Kazutoshi(Personal)
Fukushima Agricultural Technology Center
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Search repository
今須, 宏美
| ja |
今須, 宏美(Personal)
農研機構東北農業研究センター
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| en |
IMASU, Hiromi(Personal)
Tohoku Agricultural Research Center, NARO
|
Search repository
篠遠, 善哉
| ja |
篠遠, 善哉(Personal)
農研機構東北農業研究センター
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| en |
SHINOTO, Yoshiya(Personal)
Tohoku Agricultural Research Center, NARO
|
Search repository
屋比久, 貴之
| ja |
屋比久, 貴之(Personal)
農研機構東北農業研究センター
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| en |
YABIKU, Takayuki(Personal)
Tohoku Agricultural Research Center, NARO
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Search repository
松波, 寿典
| ja |
松波, 寿典(Personal)
農研機構東北農業研究センター
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| en |
MATSUNAMI, Toshinori(Personal)
Tohoku Agricultural Research Center, NARO
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Search repository
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内容記述 |
The characteristics and temperature responses of sparsely sown rice seedlings were investigated using leading rice cultivars in the Tohoku region. In experiment 1, ‘Akitakomachi’ seedlings were investigated under three sowing conditions: sparse (60 g box-1 of dry seed), standard (120 g box-1), and dense (240 g box-1), at Iwate University in 2020. Compared to the standard and dense sowing conditions, the sparse sowing condition produced seedlings with more vigorous leaf age development and higher dry matter weight with increasing accumulated soil temperature. In addition, sparsely sown seedlings had higher dry matter weight per plant length than those sown under other densities. In experiment 2, the seedling quality of leading cultivars such as ‘Masshigura’, ‘Akitakomachi’, ‘Ginganoshizuku’, ‘Haenuki’, ‘Hitomebore’ and ‘Tennotsubu’ was investigated at each experimental site in the Tohoku region in 2023 and 2024 under sparse sowing (65–80 g box-1) and standard sowing conditions (120–160 g box-1). The sparsely sown seedlings had higher dry matter weight and more seedling vigor than standard seedlings under an accumulated air temperature range of 400–700°C-day, regardless of the experimental site and cultivar. This is attributed to the larger dry matter per unit air temperature of the sparsely sown seedlings. Sparse sowing can maintain superior seedling quality over a wide temperature range; therefore, it is not only beneficial for large-scale operations with long transplanting periods but also helps to prevent the decline of seedling quality under the global warming environmental situation. |