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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.11
- 수록면
- 567 - 578 (12page)
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초록· 키워드
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This study was designed to assess the nutrients characteristics and redox potential changes as affected by water management condition in rice paddy weighing lysimeter. Rice was grown from June to October 2015, and the water management was consisted of two methods: continuously flooding (CF) and alternate wetting and drying (AWD). Under the CF condition, the redox potential (Eh) of 5 cm topsoil began to decrease rapidly and maintained around -260 to -200 mV. The AWD showed the oxidation condition. The changes of soil pH in CF and AWD ranged from 6.0 to 7.0 and 5.7 to 7.1, respectively. Soil pH in the AWD condition indicated up and down patterns by irrigation. In changes in nutrient contents of the soil solutions, nitrate nitrogen (NO₃-N) was initially 12.2 to 26.6 mg L<SUP>-1</SUP> at the highest concentration, and the concentration of ammonia nitrogen (NH₄-N) and phosphate (PO₄<SUP>3-</SUP>) appeared to be lower than 1 mg L<SUP>-1</SUP> during rice cultivation. The grain yield of rice was significantly higher in the CF than in the AWD. Nitrogen and magnesium content in both rice grain and straw were not significantly different between the water management conditions. Phosphorous, potassium, and calcium content in the rice grain were not statistically different between CF and AWD conditions. However, the nutrient contents in rice straw were higher in the CF, compared with that in the AWD. Although the iron content in rice straw was higher in the CF than in the AWD, the manganese content showed an opposite tendency. Interestingly, soil maximum temperature at the daytime was significantly higher in the AWD than in the CF, whereas the soil minimum temperature at the night time was 0.5-0.9℃ lower in the AWD, compared with that of the CF. Therefore, these results suggest that the decrease in rice yield in AWD condition can be linked to the inhibition of phosphate absorption into rice plants under oxidized-soil condition and/or high temperature difference between day and night in the soil.
목차
ABSTRACT
Introduction
Materials and Methods
Results and Discussion
Conclusions
References
참고문헌 (46)
참고문헌 신청
Alam, S.M., 1985. Effects of iron and manganese on the growth of rice and on the contents of these elements in rice plants. Agronomie. 5(6):487-490.
Blake, G.R. and K.H. Hartge. 1986. Bulk density in methods of soil analysis, part1. Klute, A. (ed.). Monograph No. 9, ASA, Madison, Wisconsin, USA.
Bouman, B.A.M., R.M. Lampayan, and T.P. Tuong. 2007. Water management in irrigated rice: coping with water scarcity. International Rice Research Institute, Los Banos, Philippines.
Brus, D.J. and I.G.A.M. Noij. 2008. Designing sampling schemes for effect monitoring of nutrient leaching from agricultural soils. Eur. J. Soil Sci. 59:292-303.
Buresh, R.J., K.R. Reddy, and C. van Kessel. 2008. Nitrogen transformations in submerged soils. p. 401-436. J.S. Schepers, W.R. Raun (Eds.), Nitrogen in agricultural systems, Agronomy monograph 49, American Society of Agronomy, Madison, WI, USA.
Blake, G.R. and K.H. Hartge. 1986. Bulk density in methods of soil analysis, part1. Klute, A. (ed.). Monograph No. 9, ASA, Madison, Wisconsin, USA.
Bouman, B.A.M., R.M. Lampayan, and T.P. Tuong. 2007. Water management in irrigated rice: coping with water scarcity. International Rice Research Institute, Los Banos, Philippines.
Brus, D.J. and I.G.A.M. Noij. 2008. Designing sampling schemes for effect monitoring of nutrient leaching from agricultural soils. Eur. J. Soil Sci. 59:292-303.
Buresh, R.J., K.R. Reddy, and C. van Kessel. 2008. Nitrogen transformations in submerged soils. p. 401-436. J.S. Schepers, W.R. Raun (Eds.), Nitrogen in agricultural systems, Agronomy monograph 49, American Society of Agronomy, Madison, WI, USA.
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UCI(KEPA) : I410-ECN-0101-2020-523-000120634