
検索結果 3398 件
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Sato, Haruna| Kato, Kosuke| Koreishi, Mayuko| Nakamura, Yoshimasa| Tsujino, Yoshio| Satoh, Ayano| |
| 発行日 | 2024-01-05 |
| 出版物タイトル | PLoS ONE |
| 巻 | 19巻 |
| 号 | 1号 |
| 出版者 | Public Library of Science |
| 開始ページ | e0296408 |
| ISSN | 1932-6203 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 Sato et al. |
| 論文のバージョン | publisher |
| PubMed ID | 38181031 |
| DOI | 10.1371/journal.pone.0296408 |
| Web of Science KeyUT | 001153716700065 |
| 関連URL | isVersionOf https://doi.org/10.1371/journal.pone.0296408 |
| フルテキストURL | fulltext20240222-01.pdf |
|---|---|
| 著者 | Kubo, Kazuki| Yagi, Kairi| Kanda, Takefumi| Yasuda, Koa| Yamaguchi, Daisuke| Wakimoto, Shuichi| |
| キーワード | cryogenic ultrasonic piezoelectric transducer |
| 備考 | This is the Accepted Manuscript version of an article accepted for publication in Japanese Journal of Applied Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.35848/1347-4065/ad1e9b.| This fulltext file will be available in Feb. 2025.| |
| 発行日 | 2024-02-07 |
| 出版物タイトル | Japanese Journal of Applied Physics |
| 巻 | 63巻 |
| 号 | 3号 |
| 出版者 | IOP Publishing |
| 開始ページ | 03SP03 |
| ISSN | 0021-4922 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 The Japan Society of Applied Physics |
| 論文のバージョン | author |
| DOI | 10.35848/1347-4065/ad1e9b |
| Web of Science KeyUT | 001157397300001 |
| 関連URL | isVersionOf https://doi.org/10.35848/1347-4065/ad1e9b |
| フルテキストURL | fulltext20240221-01.pdf |
|---|---|
| 著者 | Iijima, Yuta| Miki, Ryohei| Fujimura, Masatake| Oyadomari, Seiichi| Uehara, Takashi| |
| キーワード | Methylmercury Neuronal cell death Apoptosis CHOP Knockout mouse |
| 発行日 | 2024 |
| 出版物タイトル | The Journal of Toxicological Sciences |
| 巻 | 49巻 |
| 号 | 2号 |
| 出版者 | Japanese Society of Toxicology |
| 開始ページ | 55 |
| 終了ページ | 60 |
| ISSN | 0388-1350 |
| NCID | AN00002808 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 The Japanese Society of Toxicology |
| 論文のバージョン | publisher |
| PubMed ID | 38296529 |
| DOI | 10.2131/jts.49.55 |
| Web of Science KeyUT | 001157348600004 |
| 関連URL | isVersionOf https://doi.org/10.2131/jts.49.55 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Kanao, Tadayoshi| |
| キーワード | tetrathionate hydrolase reduced inorganic sulfur compounds dissimilatory sulfur metabolism S4-intermediate pathway acidophiles chemoautotroph |
| 発行日 | 2024-01-29 |
| 出版物タイトル | Frontiers in Microbiology |
| 巻 | 15巻 |
| 出版者 | Frontiers Media |
| 開始ページ | 1338669 |
| ISSN | 1664-302X |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 Kanao. |
| 論文のバージョン | publisher |
| PubMed ID | 38348185 |
| DOI | 10.3389/fmicb.2024.1338669 |
| Web of Science KeyUT | 001160607900001 |
| 関連URL | isVersionOf https://doi.org/10.3389/fmicb.2024.1338669 |
| フルテキストURL | fulltext20240220-01.pdf fig20240220-01.pdf table20240220-01.pdf |
|---|---|
| 著者 | Nakashima, Masahiro| Yamazaki, Yuta| |
| キーワード | Attenuation correction Brain perfusion Head holder Single-photon emission computed tomography |
| 備考 | This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s12194-024-00778-x| This fulltext file will be available in Feb. 2025.| |
| 発行日 | 2024-02-09 |
| 出版物タイトル | Radiological Physics and Technology |
| 巻 | 17巻 |
| 号 | 1号 |
| 出版者 | Springer Science and Business Media LLC |
| 開始ページ | 322 |
| 終了ページ | 328 |
| ISSN | 1865-0333 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s), under exclusive licence to Japanese Society of Radiological Technology and Japan Society of Medical Physics 2024 |
| 論文のバージョン | author |
| PubMed ID | 38332240 |
| DOI | 10.1007/s12194-024-00778-x |
| Web of Science KeyUT | 001157594000001 |
| 関連URL | isVersionOf https://doi.org/10.1007/s12194-024-00778-x |
| フルテキストURL | fulltext20240219-04.pdf |
|---|---|
| 著者 | Takahara, Kazuma| Horino, Yuki| Wada, Koki| Sakata, Hiromu| Tomita, Daichi| Sunatsuki, Yukinari| Isobe, Hiroshi| Kojima, Masaaki| Suzuki, Takayoshi| |
| 発行日 | 2024 |
| 出版物タイトル | CrystEngComm |
| 巻 | 26巻 |
| 号 | 7号 |
| 出版者 | Royal Society of Chemistry (RSC) |
| 開始ページ | 1004 |
| 終了ページ | 1014 |
| ISSN | 1466-8033 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Royal Society of Chemistry 2024 |
| 論文のバージョン | publisher |
| DOI | 10.1039/d3ce01192e |
| Web of Science KeyUT | 001153946300001 |
| 関連URL | isVersionOf https://doi.org/10.1039/d3ce01192e |
| フルテキストURL | fulltext20240219-03.pdf |
|---|---|
| 著者 | Abe, Takumi| |
| 備考 | This is an Accepted Manuscript of an article published by Royal Society of Chemistry (RSC).| This fulltext file will be available in Jan. 2025.| |
| 発行日 | 2024 |
| 出版物タイトル | Organic and Biomolecular Chemistry |
| 巻 | 22巻 |
| 号 | 9号 |
| 出版者 | Royal Society of Chemistry (RSC) |
| 開始ページ | 1756 |
| 終了ページ | 1764 |
| ISSN | 1477-0520 |
| NCID | AA1168650X |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Royal Society of Chemistry 2024 |
| 論文のバージョン | author |
| PubMed ID | 38319400 |
| DOI | 10.1039/d3ob02089d |
| Web of Science KeyUT | 001156670800001 |
| 関連URL | isVersionOf https://doi.org/10.1039/d3ob02089d |
| フルテキストURL | fulltext20240219-02.pdf |
|---|---|
| 著者 | Nakaoka, Koichi| Muranaka, Satoshi| Yamamoto, Io| Ema, Tadashi| |
| 発行日 | 2024 |
| 出版物タイトル | Polymer Chemistry |
| 巻 | 15巻 |
| 号 | 8号 |
| 出版者 | Royal Society of Chemistry (RSC) |
| 開始ページ | 707 |
| 終了ページ | 713 |
| ISSN | 1759-9954 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Royal Society of Chemistry 2024 |
| 論文のバージョン | publisher |
| DOI | 10.1039/d3py01165h |
| Web of Science KeyUT | 001158221500001 |
| 関連URL | isVersionOf https://doi.org/10.1039/d3py01165h |
| フルテキストURL | fulltext20240219-01.pdf |
|---|---|
| 著者 | Suganami, Yoshiki| Oshikiri, Tomoya| Mitomo, Hideyuki| Sasaki, Keiji| Liu, Yen-En| Shi, Xu| Matsuo, Yasutaka| Ijiro, Kuniharu| Misawa, Hiroaki| |
| キーワード | localized surface plasmon resonance modalultrastrongcoupling surface-enhanced Raman scattering quantumcoherence self-assembly |
| 発行日 | 2024-02-01 |
| 出版物タイトル | ACS Nano |
| 巻 | 18巻 |
| 号 | 6号 |
| 出版者 | American Chemical Society (ACS) |
| 開始ページ | 4993 |
| 終了ページ | 5002 |
| ISSN | 1936-0851 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 The Authors. |
| 論文のバージョン | publisher |
| PubMed ID | 38299996 |
| DOI | 10.1021/acsnano.3c10959 |
| Web of Science KeyUT | 001159206700001 |
| 関連URL | isVersionOf https://doi.org/10.1021/acsnano.3c10959 |
| フルテキストURL | fulltext20240213-02.pdf |
|---|---|
| 著者 | Takahashi, Hirokazu| Asakura, Mami| Ide, Toru| Hayakawa, Tohru| |
| 備考 | The version of record of this article, first published in Current Microbiology, is available online at Publisher’s website: http://dx.doi.org/10.1007/s00284-023-03602-8| |
| 発行日 | 2024-01-28 |
| 出版物タイトル | Current Microbiology |
| 巻 | 81巻 |
| 号 | 3号 |
| 出版者 | Springer Science and Business Media LLC |
| 開始ページ | 80 |
| ISSN | 0343-8651 |
| NCID | AA00621783 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) 2024 |
| 論文のバージョン | publisher |
| PubMed ID | 38281302 |
| DOI | 10.1007/s00284-023-03602-8 |
| Web of Science KeyUT | 001151683900002 |
| 関連URL | isVersionOf https://doi.org/10.1007/s00284-023-03602-8 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Sato, Eisuke| Ogita, Sayaka| Mitsudo, Koichi| Suga, Seiji| |
| キーワード | N-Alkoxy Amide Cathodic Reduction Weinreb Amide |
| 発行日 | 2023-11-28 |
| 出版物タイトル | Electrochemistry |
| 巻 | 91巻 |
| 号 | 11号 |
| 出版者 | Electrochemical Society of Japan |
| 開始ページ | 112005 |
| ISSN | 1344-3542 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) 2023. |
| 論文のバージョン | publisher |
| DOI | 10.5796/electrochemistry.23-67079 |
| Web of Science KeyUT | 001150553000003 |
| 関連URL | isVersionOf https://doi.org/10.5796/electrochemistry.23-67079 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Okumura, Yasuyuki| Sato, Eisuke| Mitsudo, Koichi| Suga, Seiji| |
| キーワード | Electrosynthesis Benzothiophene S,S-Dioxide Sulfonyl Hydrazide Sulfonyl Radical |
| 発行日 | 2023-11-28 |
| 出版物タイトル | Electrochemistry |
| 巻 | 91巻 |
| 号 | 11号 |
| 出版者 | Electrochemical Society of Japan |
| 開始ページ | 112007 |
| ISSN | 1344-3542 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) 2023. |
| 論文のバージョン | publisher |
| DOI | 10.5796/electrochemistry.23-67078 |
| Web of Science KeyUT | 001150553000002 |
| 関連URL | isVersionOf https://doi.org/10.5796/electrochemistry.23-67078 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Shibanoki, Taro| Yamazaki, Yuugo| Tonooka, Hideyuki| |
| キーワード | monitoring system image processing mask R-CNN anomaly detection one-class SVM rodents |
| 発行日 | 2024-01-16 |
| 出版物タイトル | Animals |
| 巻 | 14巻 |
| 号 | 2号 |
| 出版者 | MDPI |
| 開始ページ | 281 |
| ISSN | 2076-2615 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 by the authors. |
| 論文のバージョン | publisher |
| PubMed ID | 38254450 |
| DOI | 10.3390/ani14020281 |
| Web of Science KeyUT | 001149285300001 |
| 関連URL | isVersionOf https://doi.org/10.3390/ani14020281 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Katayama, Haruyoshi| Fujimura, Atsushi| Huang, Rongsheng| Otani, Yusuke| Itano, Takuto| Fujiwara, Tomohiro| Kunisada, Toshiyuki| Nakata, Eiji| Ozaki, Toshifumi| |
| キーワード | benserazide cancer stem cell catecholamine synthase malignant peripheral nerve sheath tumor Schwann cell vesicular monoamine transporter |
| 発行日 | 2024-01-26 |
| 出版物タイトル | Cancer Science |
| 巻 | 115巻 |
| 号 | 3号 |
| 出版者 | Wiley |
| 開始ページ | 871 |
| 終了ページ | 882 |
| ISSN | 1347-9032 |
| NCID | AA11808050 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 The Authors. |
| 論文のバージョン | publisher |
| PubMed ID | 38279513 |
| DOI | 10.1111/cas.16077 |
| Web of Science KeyUT | 001149722500001 |
| 関連URL | isVersionOf https://doi.org/10.1111/cas.16077 |
| フルテキストURL | fulltext20240206-03.pdf |
|---|---|
| 著者 | Ishii, Tomoya| Tsuchida, Natsuki| Hemelda, Niarsi Merry| Saito, Kirara| Bao, Jiyuan| Watanabe, Megumi| Toyoda, Atsushi| Matsubara, Takehiro| Sato, Mayuko| Toyooka, Kiminori| Ishihama, Nobuaki| Shirasu, Ken| Matsui, Hidenori| Toyoda, Kazuhiro| Ichinose, Yuki| Hayashi, Tetsuya| Kawaguchi, Akira| Noutoshi, Yoshiteru| |
| キーワード | tailocin phage tail-like bacteriocin Allorhizobium vitris Alphaproteobacteria biocontrol crown gall disease interbacterial antagonism grapevine |
| 発行日 | 2024-01-18 |
| 出版物タイトル | The ISME Journal |
| 巻 | 18巻 |
| 号 | 1号 |
| 出版者 | Oxford University Press (OUP) |
| 開始ページ | 1 |
| 終了ページ | 12 |
| ISSN | 1751-7362 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) [2024]. |
| 論文のバージョン | publisher |
| DOI | 10.1093/ismejo/wrad003 |
| Web of Science KeyUT | 001145343000001 |
| 関連URL | isVersionOf https://doi.org/10.1093/ismejo/wrad003 |
| フルテキストURL | fulltext20240206-01.pdf |
|---|---|
| 著者 | Mizutani, Yuna| Watanabe, Takaichi| Lopez, Carlos G.| Ono, Tsutomu| |
| 発行日 | 2024-01-18 |
| 出版物タイトル | Soft Matter |
| 巻 | 20巻 |
| 号 | 7号 |
| 出版者 | Royal Society of Chemistry (RSC) |
| 開始ページ | 1611 |
| 終了ページ | 1619 |
| ISSN | 1744-683X |
| NCID | AA12068335 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Royal Society of Chemistry 2024 |
| 論文のバージョン | publisher |
| PubMed ID | 38275008 |
| DOI | 10.1039/d3sm01626a |
| Web of Science KeyUT | 001149540900001 |
| 関連URL | isVersionOf https://doi.org/10.1039/d3sm01626a |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Yang, Chen| Shitamukai, Atsunori| Yang, Shucai| Kawaguchi, Ayano| |
| キーワード | in vivo electroporation in utero electroporation genome editing IUE iON TEMPO iGONAD |
| 発行日 | 2023-09-15 |
| 出版物タイトル | International Journal of Molecular Sciences |
| 巻 | 24巻 |
| 号 | 18号 |
| 出版者 | MDPI |
| 開始ページ | 14128 |
| ISSN | 1661-6596 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2023 by the authors. |
| 論文のバージョン | publisher |
| PubMed ID | 37762431 |
| DOI | 10.3390/ijms241814128 |
| Web of Science KeyUT | 001145294000001 |
| 関連URL | isVersionOf https://doi.org/10.3390/ijms241814128 |
| フルテキストURL | srfa_113_041_048.pdf |
|---|---|
| 著者 | Tanaka, Yu| Watanabe, Tomoya| Katsura, Keisuke| Tsujimoto, Yasuhiro| Takai, Toshiyuki| Tanaka, Takashi Sonam Tashi| Kawamura, Kensuke| Saito, Hiroki| Homma, Koki| Mairoua, Salifou Goube| Ahouanton, Kokou| Ibrahim, Ali| Senthilkumar, Kalimuthu| Semwal, Vimal Kumar| Matute, Eduardo Jose Graterol| Corredor, Edgar| El-Namaky, Raafat| Manigbas, Norvie| Quilang, Eduardo Jimmy P.| Iwahashi, Yu| Nakajima, Kota| Takeuchi, Eisuke| Saito, Kazuki| |
| 抄録 | Rice (Oryza sativa L.) is one of the most important cereals, which provides 20% of the world’s food energy. However, its productivity is poorly assessed especially in the global South. Here, we provide a first study to perform a deep learning-based approach for instantaneously estimating rice yield using RGB images. During ripening stage and at harvest, over 22,000 digital images were captured vertically downwards over the rice canopy from a distance of 0.8 to 0.9m at 4,820 harvesting plots having the yield of 0.1 to 16.1 t ha-1 across six countries in Africa and Japan. A convolutional neural network (CNN) applied to these data at harvest predicted 68% variation in yield with a relative root mean square error (rRMSE) of 0.22. Even when the resolution of images was reduced (from 0.2 to 3.2cm pixel-1 of ground sampling distance), the model could predict 57% variation in yield, implying that this approach can be scaled by use of unmanned aerial vehicles. Our work offers low-cost, hands-on, and rapid approach for high throughput phenotyping, and can lead to impact assessment of productivity-enhancing interventions, detection of fields where these are needed to sustainably increase crop production. |
| キーワード | Rice (Oryza sativa L.) rough grain yield convolutional neural network RGB images UAV |
| 出版物タイトル | 岡山大学農学部学術報告 |
| 発行日 | 2024-02-01 |
| 巻 | 113巻 |
| 開始ページ | 41 |
| 終了ページ | 48 |
| ISSN | 2186-7755 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| タイトル(別表記) | Comparisons of nitrogen use efficiency between rice cv. Nipponbare and Takanari at different fertilization levels |
|---|---|
| フルテキストURL | srfa_113_033_039.pdf |
| 著者 | 齊藤 邦行| 檀野 祐亮| |
| 抄録 | The rice cultivar Nipponbare and the high-yielding cultivar Takanari were cultivated in field trials for three years from 2003, and in pot trials (1/2,000a) for two years from 2004. In the field trials, the following three levels of fertilizer were applied:“0N” without fertilizer, “1N” with the standard amount(8kgN 10a–1), and “2N” with twice the standard amount (16kgN 10a–1). In the pot trial, three levels of fertilizer were applied:“0N” without fertilizer, “1.5N” with 1.5times the standard amount (1.5gN pot–1), and “3N” with three times the standard amount (3gN pot–1). In the field trials, yields were higher in Takanari (538 to 843g m–2) than in Nihonbare (423 to 577g m–2), and the increase in yield with fertilizer application was also larger in Takanari. This was related to the larger sink capacity of Takanari and the smaller decrease in the percentage of filled grain with larger sink capacity. The dry matter weight and nitrogen uptake at the panicle initiation stage were higher in the plots with higher fertilizer application, but the differences between the cultivars were small. Dry matter weight and nitrogen uptake at harvest time were higher in Takanari, and nitrogen use efficiency and sink production efficiency were also higher in Takanari, but the differences in nitrogen use efficiency between cultivars became smaller with increasing fertilizer application. The nitrogen use efficiency for dry matter production also decreased with increasing fertilizer application, and was higher in 2005 in Takanari. The leaf photosynthetic rate of Takanari was higher than that of Nipponbare in the pot experiment. The difference in leaf photosynthetic rate was related to the nitrogen use efficiency (photosynthetic rate / leaf nitrogen content), and the difference in leaf nitrogen content between cultivars was small. The nitrogen use efficiency for dry matter was highest in the “0N” and decreased with increasing fertilizer application, and was higher in Takanari than in Nipponbare. This was presumably related to the higher nitrogen use efficiency of photosynthesis. It was found that fertilizer application decreased nitrogen use efficiency and sink production efficiency, but yield increased with increasing sink capacity, and that differences in nitrogen use efficiency among cultivars were related to the amount of nitrogen absorbed up to the panicle initiation stage and sink production efficiency. In order to improve the efficiency of fertilizer application, it is desirable to increase nitrogen absorption, which is expressed as multiplying the number of days to panicle initiation and the rate of nitrogen absorption, and to select cultivars with higher sink production efficiency. |
| キーワード | High-yielding rice cultivar Nitrogen use efficiency Nitrogen uptake Sink capacity Sink production efficiency |
| 出版物タイトル | 岡山大学農学部学術報告 |
| 発行日 | 2024-02-01 |
| 巻 | 113巻 |
| 開始ページ | 33 |
| 終了ページ | 39 |
| ISSN | 2186-7755 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| タイトル(別表記) | Cultivar differences in nitrogen use efficiency of rice |
|---|---|
| フルテキストURL | srfa_113_017_024.pdf |
| 著者 | 齊藤 邦行| 岩目 好史| 前川 雅彦| 武田 和義| |
| 抄録 | We investigated the effects of fertilizer-free and fertilizer-applied cultivation on growth, yield and nitrogen (N) utilization of rice cultivars in our Kurashiki paddy fields (Institute of Plant Science and Resources, Okayama Univ.), which have been cultivated without fertilizer since 1970, and also in our Okayama paddy fields, which are conventionally cultivated. In 2001, the cultivars Nipponbare (NIP) and Nourin 18 (N18) were cultivated in the Kurashiki fields, with a “0N plot” (no fertilizer application), a “1N plot” (standard fertilizer application), and a “2N plot” (double fertilizer application). In 2002, five cultivars were grown without fertilizer in the Kurashiki fields, and 51cultivars were tested in 0N and 1N plots in the Okayama fields. Yield (2001) in the Kurashiki fields was higher in the 0N plot for N18 (379g m–2), which had a higher number of spikelets per m2, than NIP (300 g m–2), while in the 1N and 2N plots it was higher for NIP, which had a higher percentage of ripening, and N18 had high yield potential even without fertilizer application, but low fertilizer tolerance. The differences in yield were related to N-uptake (NU), and the differences in N use efficiency (NUE, yield/NU) between cultivars were small. The pot experiment showed that the yield of 0N plot was higher for N18 than NIP grown in Kurashiki soil because of the higher number of spikelets per hill, and the yield in the Okayama soil was higher than that in the Kurashiki soil. Long-term non-fertilized soils are of poor soil fertility, which also decreases the NUE, and the NUE of N18 is higher than that of NIP under isolated conditions. The difference in yields is closely related to sink capacity (SC). In 2002, yields in the Kurashiki fields were highest in Takanari (TAK, 494g m–2) and lowest in NIP (350g m–2), and differences in yields were closely related to SC. NUE was highest in TAK (68.6) and lowest in Akebono (48.1). TAK had high NUE and high sink production efficiency (SPE, SC/NU), while N18 had low NUE but high SC due to higher NU, ensuring high yield even under unfertilized cultivation. Yields in the 0N and 1N plots cultivated in 2002 varied between 244–631g m–2 and 199–769g m–2, respectively. A close positive correlation was observed between yield and SC, and between NU and SC, suggesting that the SC through NU is involved in determining yield. A positive correlation was also observed between NUE and yield. It was found that yield increased with an increase in NUE, and that NUE decreased although yield increased with fertilizer application. Through selection of cultivars with high SPE, it is expected that it will be possible to breed low-input, high-yielding cultivars with high NUE in the future. |
| キーワード | High-yielding rice cultivar Nitrogen use efficiency Nitrogen uptake Sink capacity Sink production efficiency Unfertilized paddy field |
| 出版物タイトル | 岡山大学農学部学術報告 |
| 発行日 | 2024-02-01 |
| 巻 | 113巻 |
| 開始ページ | 17 |
| 終了ページ | 24 |
| ISSN | 2186-7755 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |