Effect of Nitrogen Application Methods on Yield and Grain Quality of an Extremely Early Maturing Rice Variety

Yeotae Yun (), Gyucheol Kim, Giwon Cho, Youngju Lee, Tugsang Yun and Hakhun Kim
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Yeotae Yun: Crop Research Department, Chungcheongnamdo Agricultural Research and Extension Services, Yesan 340861, Chungcheongnamdo, Republic of Korea
Gyucheol Kim: Crop Research Department, Chungcheongnamdo Agricultural Research and Extension Services, Yesan 340861, Chungcheongnamdo, Republic of Korea
Giwon Cho: Crop Research Department, Chungcheongnamdo Agricultural Research and Extension Services, Yesan 340861, Chungcheongnamdo, Republic of Korea
Youngju Lee: Crop Research Department, Chungcheongnamdo Agricultural Research and Extension Services, Yesan 340861, Chungcheongnamdo, Republic of Korea
Tugsang Yun: Crop Research Department, Chungcheongnamdo Agricultural Research and Extension Services, Yesan 340861, Chungcheongnamdo, Republic of Korea
Hakhun Kim: Crop Research Department, Chungcheongnamdo Agricultural Research and Extension Services, Yesan 340861, Chungcheongnamdo, Republic of Korea

Agriculture, 2023, vol. 13, issue 4, 1-14

Abstract: This study aimed to investigate the effect of nitrogen application methods on the yield and grain quality of an extremely early maturing rice variety. The experiment was conducted in the rice research field of Chungnam Agricultural Research and Extension Services, South Korea, in 2019 and 2020. Two nitrogen application methods, BD (100% as a basal dressing) and BTD (70% as a basal dressing + 30% as a top dressing), with three different nitrogen levels (70 kg/ha, 90 kg/ha, and 110 kg/ha), were employed. The results showed that BD treatment had comparable or higher head rice yields and improved grain quality compared to BTD treatment at all nitrogen levels. Additionally, the SPAD value at heading date was highly correlated with both the protein content (r 2 = 0.838**) and glossiness of cooked rice (r 2 = 0.630**). Therefore, this study suggests that BD treatment could be an effective approach to improve the productivity and quality of extremely early maturing rice varieties while saving on labor costs, and the SPAD value can be used as an index to infer the taste of rice. In conclusion, this study provides useful insights into nitrogen application methods that can be used to enhance the yield and quality of extremely early maturing rice varieties.

Keywords: rice; nitrogen; yield; quality; extremely early maturing rice (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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