Responses of super rice (Oryza sativa L.) to different planting methods for grain yield and nitrogen-use efficiency in the single cropping season

Chen, Song, Wang, Danying, Xu, Chunmei, Ji, Chenglin, Zhang, Xiaoguo, Zhao, Xia, Zhang, Xiufu and Chauhan, Bhagirath Singh (2014) Responses of super rice (Oryza sativa L.) to different planting methods for grain yield and nitrogen-use efficiency in the single cropping season. PLoS One, 9 8: e104950.1-e104950.9. doi:10.1371/journal.pone.0104950


Author Chen, Song
Wang, Danying
Xu, Chunmei
Ji, Chenglin
Zhang, Xiaoguo
Zhao, Xia
Zhang, Xiufu
Chauhan, Bhagirath Singh
Title Responses of super rice (Oryza sativa L.) to different planting methods for grain yield and nitrogen-use efficiency in the single cropping season
Formatted title
Responses of super rice (Oryza sativa L.) to different planting methods for grain yield and nitrogen-use efficiency in the single cropping season
Journal name PLoS One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2014-08-11
Sub-type Article (original research)
DOI 10.1371/journal.pone.0104950
Open Access Status DOI
Volume 9
Issue 8
Start page e104950.1
End page e104950.9
Total pages 9
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Collection year 2015
Language eng
Formatted abstract
To break the yield ceiling of rice production, a super rice project was developed in 1996 to breed rice varieties with super high yield. A two-year experiment was conducted to evaluate yield and nitrogen (N)-use response of super rice to different planting methods in the single cropping season. A total of 17 rice varieties, including 13 super rice and four non-super checks (CK), were grown under three N levels [0 (N0), 150 (N150), and 225 (N225) kg ha -1] and two planting methods [transplanting (TP) and direct-seeding in wet conditions (WDS)]. Grain yield under WDS (7.69 t ha-1) was generally lower than TP (8.58 t ha-1). However, grain yield under different planting methods was affected by N rates as well as variety groups. In both years, there was no difference in grain yield between super and CK varieties at N150, irrespective of planting methods. However, grain yield difference was dramatic in japonica groups at N225, that is, there was an 11.3% and 14.1% average increase in super rice than in CK varieties in WDS and TP, respectively. This suggests that high N input contributes to narrowing the yield gap in super rice varieties, which also indicates that super rice was bred for high fertility conditions. In the japonica group, more N was accumulated in super rice than in CK at N225, but no difference was found between super and CK varieties at N0 and N150. Similar results were also found for N agronomic efficiency. The results suggest that super rice varieties have an advantage for N-use efficiency when high N is applied. The response of super rice was greater under TP than under WDS. The results suggest that the need to further improve agronomic and other management practices to achieve high yield and N-use efficiency for super rice varieties in WDS.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2015 Collection
 
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Created: Fri, 22 Aug 2014, 20:35:45 EST by Bhagirath Chauhan on behalf of Centre for Plant Science