Universal Journal of Agricultural Research Vol. 10(6), pp. 821 - 837
DOI: 10.13189/ujar.2022.100620
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Yield and Seed Chemical Composition under Elevated CO₂ and Temperature Based on the RCP 4.5 Scenario of Important Thai Rice

Kanita Thanacharoenchnaphas ^*, Parwat Wijarat , Orose Rugchati , Tanyaluck Chansombat
Faculty of Agriculture Natural Resources and Environment, Naresuan University, Phitsanulok, Thailand

ABSTRACT

This research aimed to examine the effects of combining increased temperature and carbon dioxide (CO₂) under RCP 4.5 scenarios on yield and seed chemical composition of Thai rice cultivars; Chinat1, Phathumthani1, and Phitsanulok2. The field warming experiment was conducted at Phitsanulok from 2018 to 2020. Sixteen field-open top chambers (OTCs) were applied to simulate the expected future climate situation under RCP 4.5 (the elevated temperature at 2℃ and CO₂ up to 800 ppm, respectively). The results revealed that the single factor of elevated temperature at 2℃ led to statistically significant grain size reductions of 2 rice cultivars; Chinat1 and Phitsanulok2. We also found that the combination of elevated temperature and CO₂ induced a significant grain yield loss (ton.ha-1) by 68% in Phitsanulok2 but an increase of 38% appeared in Chainat1. Considering results in seed chemicals, the statistically significant decrease trends in Amylose and Brix values were shown in 3 cultivars. These results suggest that elevated temperature and CO₂ caused the imbalance in seed nutrient contents and an increase in yield loss in some Thai rice cultivars.

KEYWORDS
Scenario, Rice, Yield, Amylose, Brix Value

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Kanita Thanacharoenchnaphas , Parwat Wijarat , Orose Rugchati , Tanyaluck Chansombat , "Yield and Seed Chemical Composition under Elevated CO₂ and Temperature Based on the RCP 4.5 Scenario of Important Thai Rice," Universal Journal of Agricultural Research, Vol. 10, No. 6, pp. 821 - 837, 2022. DOI: 10.13189/ujar.2022.100620.

(b). APA Format:
Kanita Thanacharoenchnaphas , Parwat Wijarat , Orose Rugchati , Tanyaluck Chansombat (2022). Yield and Seed Chemical Composition under Elevated CO₂ and Temperature Based on the RCP 4.5 Scenario of Important Thai Rice. Universal Journal of Agricultural Research, 10(6), 821 - 837. DOI: 10.13189/ujar.2022.100620.