globalchange  > 气候变化事实与影响
WOS记录号: WOS:000462097200004
论文题名:
Growth, yield and nitrogen uptake in rice crop grown under elevated carbon dioxide and different doses of nitrogen fertilizer
作者: Raj, Amita1; Chakrabarti, B.1; Pathak, H.3; Singh, S. D.1; Mina, U.1; Purakayastha, T. J.2
通讯作者: Raj, Amita
刊名: INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY
ISSN: 0019-5189
EISSN: 0975-1009
出版年: 2019
卷: 57, 期:3, 页码:181-187
语种: 英语
英文关键词: Climate change ; Elevated CO2 ; Paddy ; Oryza sativa
WOS关键词: AIR CO2 ENRICHMENT ; ORYZA-SATIVA L. ; SEASONAL-CHANGES ; PLANT-GROWTH ; TEMPERATURE ; DYNAMICS ; QUALITY ; RATES ; WHEAT ; FACE
WOS学科分类: Biology
WOS研究方向: Life Sciences & Biomedicine - Other Topics
英文摘要:

Climate change associated with rising atmospheric carbon dioxide (CO2) concentration may have impact on crop production and soil health. Increase in atmospheric CO2 concentration may enhance crop growth with higher demand for nutrients by the crop. An experiment was conducted during July-October, 2013 using Free Air Carbon Dioxide Enrichment facility at the Indian Agricultural Research Institute, New Delhi to study the impact of elevated CO2 and nitrogen (N) dose on growth, yield and nitrogen uptake in rice crop. Four doses of N, i.e., control, 0.6 g N pol(-1 )(75% recommended dose of N), 0.8 g N pot(-1 )(100% recommended dose of N) and 1.0 g N pot(-1) (125% recommended dose of N) were applied in both ambient (395 ppm) and elevated CO2 (550 +/- 20 ppm) conditions. Grain and biomass yield of rice was significantly higher under elevated CO(2 )condition. Plant growth and yield parameters also increased with increased N doses in both elevated and ambient CO2 conditions. Nitrogen concentration of grain and straw decreased under high CO2 level but N uptake increased under elevated CO2 condition. Agronomic efficiency of N was higher under elevated CO2 while recovery efficiency of N remained unaffected. The study showed that although yield of rice increases under elevated CO2 condition, to maintain plant nitrogen concentration, application of additional dose of N is required.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/131021
Appears in Collections:气候变化事实与影响

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作者单位: 1.ICAR Indian Agr Res Inst, Ctr Environm Sci & Climate Resilient Agr, New Delhi 110012, India
2.ICAR Indian Agr Res Inst, Soil Sci & Agr Chem, New Delhi 110012, India
3.Natl Rice Res Inst, Cuttack 753006, Odisha, India

Recommended Citation:
Raj, Amita,Chakrabarti, B.,Pathak, H.,et al. Growth, yield and nitrogen uptake in rice crop grown under elevated carbon dioxide and different doses of nitrogen fertilizer[J]. INDIAN JOURNAL OF EXPERIMENTAL BIOLOGY,2019-01-01,57(3):181-187
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