Growth and nitrogen allocation of dry season tropical rice as a result of carbon dioxide fertilization and elevated night time temperature

被引:12
作者
Roy, K. S. [1 ]
Bhattacharyya, P. [1 ]
Nayak, A. K. [1 ]
Sharma, S. G. [2 ]
Uprety, D. C. [3 ]
机构
[1] Cent Rice Res Inst, Crop Prod Div, Cuttack 753006, Orissa, India
[2] Cent Rice Res Inst, Biochem Physiol & Environm Sci Div, Cuttack 753006, Orissa, India
[3] Indian Agr Res Inst, Div Plant Physiol, New Delhi 110012, India
关键词
CO2; fertilization; Elevated temperature; Rice crop; Growth stages; C and N allocation; Amylose; AIR CO2 ENRICHMENT; ORYZA-SATIVA; MATTER PRODUCTION; SPIKELET FERTILITY; ATMOSPHERIC CO2; SUBHUMID ZONE; YIELD; FACE; IMPACT; GRAIN;
D O I
10.1007/s10705-015-9741-2
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
A field experiment was laid out on carbon dioxide (CO2) fertilization for 3 years in dry cropping seasons to investigate the effects of elevated CO2 (e-CO2) (550 A mu mol mol(-1)) and elevated CO2 (550 A mu mol mol(-1)) + elevated temperature (+2 A degrees C over ambient) (e-CO2 + T) on biomass production, carbon (C) and nitrogen (N) concentration in plant parts, its allocation and grain quality in a tropical rice (cultivar-Naveen) under open top chambers (OTCs). The aboveground plant biomass, root biomass, leaf area index and net C assimilation rates were increased significantly under e-CO2 to that of ambient CO2 in control chamber CC by 32, 26, 21 and 37 %, respectively over the three dry cropping seasons. The grain yield was significantly higher under e-CO2 compared to CC (21.6 %), although the higher temperature in e-CO2 + T significantly reduced the yield advantage by 8.5 % overe-CO2. The amylose content was significantly increased by 10 % under e-CO2 + T over CC. In dry season, CO2 fertilization enhanced the rice yield by 21.6 % but the yield advantage of CO2 fertilization were reduced by 8.5 % due to elevated temperature. We did not found any deterioration ingrain quality in elevated temperature (2 A degrees C) in low land rice ecologies.
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页码:293 / 309
页数:17
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