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棚沢水田における水稲の最適穎花数と体内窒素量の検討
https://nodai.repo.nii.ac.jp/records/445
https://nodai.repo.nii.ac.jp/records/4453f98b109-614d-48c9-8d8f-76b95507ff91
名前 / ファイル | ライセンス | アクション |
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KJ00007059049.pdf (556.0 kB)
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Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2011-06-20 | |||||
タイトル | ||||||
タイトル | 棚沢水田における水稲の最適穎花数と体内窒素量の検討 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Analysis of Optimum Spikelet Number and Plant N in Rice at Tanazawa Paddy Field | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 水稲 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 窒素施用 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 体内窒素量 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 穎花数 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 収量 | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | N application | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Spikelet number | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Plant N | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Rice | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Yield | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00164184 | |||||
論文名よみ | ||||||
タイトル | タナザワスイデン ニ オケル スイトウ ノ サイテキエイカスウ ト タイナイチッソリョウ ノ ケントウ | |||||
著者 |
上地, 由朗
× 上地, 由朗× 桜谷 哲夫× Kamiji, Yoshiaki× Sakuratani Tetsuo |
|||||
著者所属(日) | ||||||
東京農業大学短期大学部生物生産技術学科 | ||||||
著者所属(日) | ||||||
東京農業大学短期大学部生物生産技術学科 | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Bioproduction Technology of Junior College of Tokyo University of Agriculture | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Bioproduction Technology of Junior College of Tokyo University of Agriculture | ||||||
記事種別(日) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 論文 | |||||
記事種別(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
抄録(日) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 本研究は都市型農業がおこなわれている神奈川県厚木市の棚沢地区において,高度効率化を目指した窒素施肥管理の確立のために行ったもので,ここでは水稲の収量を最大にする最適穎花数とそのために必要な体内窒素量を検討した。栽培試験は東京農業大学棚沢水田において1998年から2008年にかけて行った。供試品種は水稲日本晴,コシヒカリおよびタカナリとし,試験区は典型的に施肥法が異なるもの,および基肥施用の有無と異なる追肥時期の組み合わせたもので構成し,合計180区であった。調査項目は収量および収量構成要,体内窒素濃度および体内窒素量の経時変化であった。タカナリは日本晴やコシヒカリよりも一穂穎花数が多い傾向にあり,その結果,単位面積あたり穎花数および玄米収量が明らかに多かった。単位面積あたり穎花数と玄米収量の関係は日本晴およびコシヒカリの日本型品種とタカナリとは明らかに異なった。収量を最大にする最適穎花数は日本晴およびコシヒカリでは35,000,タカナリでは48,000m-2であった。また,単位面積あたり穎花数は穎化分化終期および出穂期における体内窒素量の間には品種ごとに密接な関係があった。それらの関係を用いて最適穎花数に到達するために必要な出穂期における体内窒素量は日本晴,コシヒカリ,タカナリのそれぞれ,12.5,16.0,17.2gm-2であった。一方,無窒素区から算出した天然供給由来の吸収窒素量は体内窒素量の50~60%であり,残りは施肥に依存することになる。したがって,棚沢水田における水稲栽培では,最適穎花数を確保するために吸収率が高い幼穂発育期を中心とした窒素追肥を積極的に行うことが推奨される。 | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The objective of this study is to clarify regional optimum spikelet number for maximum grain yield for each cultivar, and plant N for spikelet number to obtain stable yield in rice. We conducted field experiments in a paddy field at Tanazawa District as city agriculture in order to establish highly effective N application management regionally. We analyzed 180 sets of experimental data on yield and its component, and plant N at the late spikelet differentiation and heading stage, using three low land cultivars, Nipponbare, Koshihikari and Takanari, grown under different methods and levels of N application over 9 seasons from 1998 to 2008. We made use of variously different split application of N, including basal application only (B), light basal and heavy top-dressings from the panicle initiation stage onward (L), heavy basal and heavy top-dressings from the spikelet formation stage onward (V), and no applications (0) in 1998-2001. In 2002, and 2005-2008 we set up experimental plots of the timing of a N top-dressing both with and without basal application of N. We investigated yield and its components and plant N at the late spikelet differentiation stage and heading.Takanari tended to have the largest spikelet number and grain yield averaged over all plots. Optimum spikelet number for maximum grain yield was about 35000m-2 in Nipponbare and Koshihikari, and about 48000m-2 in Takanari, respectively. The relationship between spikelet number per unit area and plant N at the late spikelet differentiation stage or heading stage was close. Plant N for optimum spikelet number determined by those relationships was 12.8, 11.4 and 12.3g m-2 at the late differentiation stage, and 12.5, 16.0 and 17.2g m-2 at heading, in Nipponabare, Koshihikari and Takanari, respectively. A grain yield of 600g m-2 in Nipponbare and Koshihikari and 750g m-2 in Takanari would require spikelet numbers per unit area of 32000, 32000 and 40000, respectively, assuming that the percentage of ripened spikelets is 85%. To obtain these spikelet numbers, plant N must reach 12.1, 11.0 and 9.1g m-2 at the heading stage for these cultivars, respectively.Plant N derived from natural supply of N was 50-60% of total plant N at the late spikelet differentiation stage or heading stage. Therefore, to optimize spikelet number, we should make use of application of N top-dressing for the early panicle development stage, since rice can absorb much nitrogen, especially the cultivar Takanari. | |||||
書誌情報 | 巻 56, 号 1, p. 93-102 | |||||
レポート・講演番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | E | |||||
表示順 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 10 | |||||
アクセション番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | KJ00007059049 |