Title Alternative Cultivar differences in nitrogen use efficiency of rice
FullText URL srfa_113_017_024.pdf
Author Saitoh, Kuniyuki| Iwame, Yoshifumi| Maekawa, Masahiko| Takeda, Kazuyoshi|
Abstract 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.
Keywords High-yielding rice cultivar Nitrogen use efficiency Nitrogen uptake Sink capacity Sink production efficiency Unfertilized paddy field
Publication Title Scientific Reports of the Faculty of Agriculture, Okayama University
Published Date 2024-02-01
Volume volume113
Start Page 17
End Page 24
ISSN 2186-7755
language Japanese
File Version publisher
FullText URL fulltext20240116-01.pdf
Author Himi, Eiko| Kurihara-Yonemoto, Shiho| Abe, Fumitaka| Takahashi, Hidekazu| Tanaka, Keisuke| Matsuura, Takakazu| Maekawa, Masahiko| Sasaki, Takuji| Rikiishi, Kazuhide|
Keywords Lipid transfer protein Pre-harvest sprouting Seed dormancy Seed germination Tamyb10 Wheat
Note The version of record of this article, first published in [Journal name], is available online at Publisher’s website: http://dx.doi.org/10.1007/s10681-023-03265-3|
Published Date 2024-01-08
Publication Title Euphytica
Volume volume220
Issue issue2
Publisher Springer Science and Business Media LLC
Start Page 16
ISSN 0014-2336
NCID AA00639246
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © The Author(s) 2024
File Version publisher
DOI 10.1007/s10681-023-03265-3
Web of Science KeyUT 001137699100001
Related Url isVersionOf https://doi.org/10.1007/s10681-023-03265-3
FullText URL fulltext20210616-1.pdf
Author Rikiishi, Kazuhide| Sugimoto, Manabu| Maekawa, Masahiko|
Keywords mutant seed development seed dormancy transcriptome wheat
Published Date 2021-02-17
Publication Title Breeding Science
Volume volume71
Issue issue2
Publisher Japanese Society of Breeding
Start Page 155
End Page 166
ISSN 1344-7610
NCID AA11353132
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
File Version publisher
NAID 130008040484
DOI 10.1270/jsbbs.20016
Web of Science KeyUT 000654086400005
Related Url isVersionOf https://doi.org/10.1270/jsbbs.20016
Author Rikiishi, Kazuhide| Maekawa, Masahiko|
Published Date 2014-09-11
Publication Title PLoS ONE
Volume volume9
Issue issue9
Content Type Journal Article