Effects of the Excessive Suppression of Tillering by Deep-Flood Irrigation and Nitrogen Fertilization on the Emergence of Upper Nodal Tillers in Rice Plants
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- Nagoshi Tokihide
- Fac. of Agr., Tokyo University of Agriculture
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- Uto Shizue
- Yokohama-City, Kanagawa
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- Matsushima Ken-Ichi
- Japan International Research Center for Agricultural Sciences
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- Hirano Shigeru
- Fac. of Agr., Tokyo University of Agriculture
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- Tamai Fujio
- Fac. of Agr., Tokyo University of Agriculture
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- Ikeda Ryoichi
- Fac. of Agr., Tokyo University of Agriculture
Bibliographic Information
- Other Title
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- 深水や窒素施肥条件による過度な分げつ抑制が水稲の高位分げつ出現に及ぼす影響
- シンスイ ヤ チッソ セヒ ジョウケン ニ ヨル カド ナ フンゲツヨクセイ ガ スイトウ ノ コウイ ブンゲツシュツゲン ニ オヨボス エイキョウ
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Abstract
The effects of deep irrigation and reduced amounts of basal nitrogen dressing on the emergence of upper nodal tillers (UNTs) were examined in a deep-flood irrigation plot and a control plot using the extremely early rice cultivar ”Kirara 397”. In both plots different amounts of nitrogen was applied as basal dressing (BD) and top-dressing at 36 days before heading (TD). However, top-dressing at the panicle formation stage (TDP) was 3 gm-2 in all plots. Three fertilization management regimes were designed: 2 gm-2 BD, 0 gm-2 TD and 3 gm-2 TDP (2・0・3 plot), 2 gm-2 BD, 2 gm-2 TD and 3 gm-2 TDP (2・2・3 plot), and 4 gm-2 BD, 0 gm-2 TD and 3 gm-2 TDP (4・0・3 plot). UNTs emerged the heading time in all experimental plots. The number of UNTs was greater in deep-flood irrigation plots than in control plots, and the number of UNTs was greatest in the 2・0・3 plot. The number of primary tillers (including main culms) showed a significant negative correlation with the number of UNTs. In the 2・2・3 plot, the UNT production was suppressed because of the increased emergence of tillers of secondary and higher orders. Thus excessive suppression of normal tillering resulted in increased UNT emergence. It was suggested that nitrogen top-dressing just before the young panicle formation stage can suppress the emergence of UNTs even if the normal tillering is suppressed.
Journal
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- Japanese Journal of Crop Science
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Japanese Journal of Crop Science 82 (2), 156-166, 2013
CROP SCIENCE SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204285391232
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- NII Article ID
- 130004461975
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- NII Book ID
- AN00189888
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- ISSN
- 13490990
- 00111848
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- NDL BIB ID
- 024650643
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed