Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments
To compare the grain yield and growth behaviors of hybrid rice, field experiments were conducted in a subtropical environment in Changsha, Hunan Province, China, and in two tropical environments in Gazipur and Habiganj in Bangladesh during 2009 to 2011. Three hybrid rice cultivars were grown under t...
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KeAi Communications Co., Ltd.
2013-04-01
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| Series: | Journal of Integrative Agriculture |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311913602804 |
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| author | Md Ibrahim Shao-bing PENG Qi-yuan TANG Min HUANG Peng JIANG Ying-bin ZOU |
| author_facet | Md Ibrahim Shao-bing PENG Qi-yuan TANG Min HUANG Peng JIANG Ying-bin ZOU |
| author_sort | Md Ibrahim |
| collection | DOAJ |
| description | To compare the grain yield and growth behaviors of hybrid rice, field experiments were conducted in a subtropical environment in Changsha, Hunan Province, China, and in two tropical environments in Gazipur and Habiganj in Bangladesh during 2009 to 2011. Three hybrid rice cultivars were grown under three nitrogen (N) management treatments in each experiment. The results showed that grain yield was significantly affected by locations, N treatments and their interaction but not by cultivars. Changsha produced 8–58% higher grain yields than Bangladesh locations. Sink size (spikelet number per unit land area) was responsible for these yield differences. Larger panicle size (spikelet number per panicle) contributed to greater sink size in Changsha. Aboveground total biomass was greater in Changsha than in Bangladesh locations, whereas harvest index was higher in Bangladesh locations than in Changsha. Crop growth rate (CGR) was greater at Changsha than Bangladesh locations during vegetative phase, while the difference was relatively small and not consistent during the later growth phases. Higher leaf area index and leaf area duration were partly responsible for the greater CGR in Changsha. Real-time N management (RTNM) produced lower grain yields than fixed-time N management in more than half of the experiments. Our study suggested that further improvement in rice yield in the tropical environments similar to those of Bangladesh will depend mainly on the ability to increase panicle size as well as CGR during vegetative phase, and the chlorophyll meter threshold value used in RTNM needs to be modified according to environmental conditions and cultivar characteristics to achieve a desirable grain yield. |
| format | Article |
| id | doaj-art-c0451d814f0e4e52a099d4e02523f97c |
| institution | Matheson Library |
| issn | 2095-3119 |
| language | English |
| publishDate | 2013-04-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Journal of Integrative Agriculture |
| spelling | doaj-art-c0451d814f0e4e52a099d4e02523f97c2025-08-02T18:26:54ZengKeAi Communications Co., Ltd.Journal of Integrative Agriculture2095-31192013-04-01124621629Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical EnvironmentsMd Ibrahim0Shao-bing PENG1Qi-yuan TANG2Min HUANG3Peng JIANG4Ying-bin ZOU5College of Agronomy, Hunan Agricultural University, Changsha 410128, P.R. ChinaCrop Physiology and Production Center (CPPC), Huazhong Agricultural University, Wuhan 430070, P.R. ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, P.R. ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, P.R. ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, P.R. ChinaCollege of Agronomy, Hunan Agricultural University, Changsha 410128, P.R. China; Correspondence ZOU Ying-bin, Mobile: 13973117515, Tel: +86-731-84618758, Fax: +86-731-84673648To compare the grain yield and growth behaviors of hybrid rice, field experiments were conducted in a subtropical environment in Changsha, Hunan Province, China, and in two tropical environments in Gazipur and Habiganj in Bangladesh during 2009 to 2011. Three hybrid rice cultivars were grown under three nitrogen (N) management treatments in each experiment. The results showed that grain yield was significantly affected by locations, N treatments and their interaction but not by cultivars. Changsha produced 8–58% higher grain yields than Bangladesh locations. Sink size (spikelet number per unit land area) was responsible for these yield differences. Larger panicle size (spikelet number per panicle) contributed to greater sink size in Changsha. Aboveground total biomass was greater in Changsha than in Bangladesh locations, whereas harvest index was higher in Bangladesh locations than in Changsha. Crop growth rate (CGR) was greater at Changsha than Bangladesh locations during vegetative phase, while the difference was relatively small and not consistent during the later growth phases. Higher leaf area index and leaf area duration were partly responsible for the greater CGR in Changsha. Real-time N management (RTNM) produced lower grain yields than fixed-time N management in more than half of the experiments. Our study suggested that further improvement in rice yield in the tropical environments similar to those of Bangladesh will depend mainly on the ability to increase panicle size as well as CGR during vegetative phase, and the chlorophyll meter threshold value used in RTNM needs to be modified according to environmental conditions and cultivar characteristics to achieve a desirable grain yield.http://www.sciencedirect.com/science/article/pii/S2095311913602804crop growth ratebiomass productionhybrid riceleaf area durationleaf area indexreal-time nitrogen management |
| spellingShingle | Md Ibrahim Shao-bing PENG Qi-yuan TANG Min HUANG Peng JIANG Ying-bin ZOU Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments Journal of Integrative Agriculture crop growth rate biomass production hybrid rice leaf area duration leaf area index real-time nitrogen management |
| title | Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments |
| title_full | Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments |
| title_fullStr | Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments |
| title_full_unstemmed | Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments |
| title_short | Comparisons of Yield and Growth Behaviors of Hybrid Rice Under Different Nitrogen Management Methods in Tropical and Subtropical Environments |
| title_sort | comparisons of yield and growth behaviors of hybrid rice under different nitrogen management methods in tropical and subtropical environments |
| topic | crop growth rate biomass production hybrid rice leaf area duration leaf area index real-time nitrogen management |
| url | http://www.sciencedirect.com/science/article/pii/S2095311913602804 |
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