질산화작용 억제 처리가 논토양의 인산 가용화와 벼의 양분흡수 및 생육에 미치는 영향
Effect of Nitrification Inhibition on Soil Phosphate Release and Nutrient Absorption and Growth of Rice Plant
1
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
환원상태가 발달된 담수상태의 토양이나 습지생태계에서NO3-는 환원상태의 진전을 지연시키는 완충역할을 할 수 있다. 논토양에서 NO3-가 Fe(III) 환원과 그에 따른 P의 가용화에 미치는 영향과 함께 질산화작용억제가 벼의 N, P 흡수및 생육에 미치는 영향을 조사하였다. 담수 후 10 cm 깊이 토양의 산화환원전위 변화는 N 비료처리별로 현저하게 달리 나타났으며, 질산화작용이 억제된요소+N-serve 처리에서는 -100 mV 이하로 낮아졌으나KNO3처리의 경우에는 0 mV 이상으로 유지되었다. 이러한현상은 질소비료 처리별로 NO3-에 의한 redox buffer 작용유무에 따라서 결정되는 것이다. N-serve 처리를 통하여 질산화작용을 억제시키면 NO3-에 의한 redox buffer 작용이없어지므로 토양의 환원현상이 크게 촉진될 수 있는 것이다. 따라서 요소+N-serve 처리에서는 다른 처리에 비하여Fe(III)의 환원과 함께 토양 용액의 PO43- 함량이 현저히 증가하였다. 질산화저해제와 함께 요소를 처리한 경우 토양 용액중의 N 및 P 함량과 함께 벼 유묘 지상부의 N과 P 함량이 가장 높았음에도 불구하고 그 생장은 가장 불량하였다. 이와 같이 요소＋N-serve 처리에서 나타난 벼 유묘 생장 저해현상은 과도한 Fe(II)의 용출과 그에 따른 벼 유묘의 Fe 과잉흡수에 기인하는 것으로 판단된다.
Abstract
In a pot experiment, we studied the effect of nitrification inhibition on Fe reduction and P release in paddy soil and growth and nutrient uptake of rice plant. Recommended level of fertilizers, 6 kg N, 5 kg P2O5 and 4 kg K2O per 10a, were applied, and for N fertilizer urea, urea+N-serve, and KNO3 were included. Four 30-day-old seedlings were transplanted in a waterlogged 9 L pot filled with Yuga series soil, and 3 pots were prepared in each N fertilizer treatment. Changes of soil redox potential and concentration of NH4+, NO3-, Fe2+ and PO43- in soil solution at 10 cm depth were monitored, and also the growth and nutrient uptake of rice plants were measured. Concentration of NH4+ in soil solution was highest in urea+N-serve treatment, and followed by urea and KNO3 treatments. Addition of N-serve could effectively inhibit nitrification in the soil. In the treatment of KNO3, relatively higher NO3- concentration was found at 10 cm depth soil. In urea+N-serve treatment redox potential was lower than -100 mV during the experiment, but in the treatment of KNO3 the potential was maintained above 0 mV until NO3- remaining in soil solution. Reduction of Fe(III) and solubilization of P were highly correlated with redox potential changes in the three N fertilizer treatments. Concentrations of Fe(II) and PO43- in soil solution at 10 cm depth were much higher in the urea+N-serve treatment. The most vigorous rice seedling growth was found in the urea treatment. Although the availability of N and P in soil was enhanced in the urea+N-serve treatment through the suppression of nitrification, excessive solubilization of Fe could limit the growth of rice plants.
참고문헌 (27)
- Achtnich, C., "Competition for electron donors among nitrate reducers, ferric iron reducers, sulfate reducers, and methanogens in anoxic paddy soil", Biol. Fertil. Soils, 19, pp.65~72 (1995)
- Anderson, J. M., "Effect of nitrate concentration in lake water on phosphate release from the sediment", Water Res., 16, pp.1119~1126 (1982)
- Becker, M., "Iron-toxicity in rice - conditions and management concepts", J. Plant Nutr. Soil Sci., 168, pp.558~573
- 정종배, "논토양에서 질산 이온이 철의 환원과 인의 용출에 미치는 영향", 한국환경농학회지, 28(2), pp.165~170 (2009), 한국환경농학회
- De Datta, S. K., "Principles and practices of rice production" (1981), Wiley
- Hong, J. K., "The characteristics of phosphorus in major Korean soils, I. The characteristics of inorganic phosphorus", J. Korean Soc. Soil Sci. Fert., 10, pp.13~22 (1977)
- Hsu, O. H., "Fixation of phosphate by aluminum and iron in acidic soils", Soil Sci., 99, pp.398~402 (1965)
- 김병호, "Effect of Nitrate in IrrigationWater on Iron Reduction and Phosphate Release in Anoxic Paddy Soil Condition", 한국토양비료학회지(Korean Journal of Soil Science and Fertilizer), 43(1), pp.68~74 (2010), 한국토양비료학회
- Liao, Z. W., "The relationship of soil and leaf nutrients to rice leaf oranging", J. Plant Nutr., 17, pp.1781~1802 (1994)
- Lucassen, E. C. H. E. T., "High groundwater nitrate concentrations inhibit eutrophication of sulphate-rich freshwater wetlands", 67, pp.249~267 (2004)
- Marschner, H., "Mineral nutrition of higher plants", pp.313~323 (1995), Academic Press
- Matocha, C. J., "Short-term response of soil iron to nitrate addition", Soil Sci. Soc. Am. J., 71, pp.108~117 (2007)
- Miller, W. P., "A micro-pipette method for soil mechanical analysis", Commun. Soil Sci. Plant Anal., 18, pp.1~15 (1987)
- NAIST, "Methods of soil chemical analysis, Rural Development Administration" (1988), Suwon
- Nelson, D. W., "Total carbon, organic carbon, and organic matter, pp. 539-579, In Page A.L. et al. (ed.) Methods of soil analysis, Part 2: Chemical and microbiological properties" (1982), SSSA
- Olson, R. V., "Iron, pp. 301-312, In Page A.L. et al. (ed.) Methods of soil analysis, Part 2: Chemical and microbiological properties" (1982), SSSA
- Ponnamperua, F. N., "The chemistry of submerged soils", Agron, 24, pp.29~26 (1972)
- Ponnamperua, F. N., "Chemical kinetics of wetland rice soils relative to soil fertility, pp. 71-89, In Wetland soils: Characterization, classification and utilization, Research paper series" (1985), International Rice Research Institute
- Sah, R. N., "Phosphorus behavior in flooded-drained soils: II. Iron transformation and phosphorus sorption", Soil Sci. Soc. Am. J., 53, pp.1718~1722 (1989)
- Sallade, Y. E., "Phosphorus transformations in the sediments of Delaware's agricultural drainageways: II. Effect of reducing conditions on phosphorus release", J. Environ. Qual., 26, pp.1579~1588 (1997)
- Sorensen, J., "Reduction of ferric iron in anaerobic, marine sediment and interaction with reduction of nitrate and sulfate", Appl. Environ. Microbiol., 43, pp.319~324 (1982)
- Sposito, G., "The chemistry of soils" (1989), Oxford University Press
- Straub, K. L., "Diversity of ferrous iron-oxidizing, nitrate-reducing bacteria and their involvement in oxygen-independent iron cycling", Geomicrobiol. J., 21, pp.371~378 (2004)
- Stucki, J. W., "The quantitative assay of minerals for Fe2+ and Fe3+ using 1,10- phenanthroline : I. Sources of variability", Soil Sci. Soc. Am. J., 45, pp.633~637 (1981)
- Surridge, B. W. J., "The release of phosphorus to pore water and surface water from river riparian sediments", J. Environ. Qual., 36, pp.1534~1544 (2007)
- Weber, K. A., "Anaerobic nitrate-dependent iron(II) bio-oxidation by a novel lithoautotrophic betaproteobacterium, strain 2002, Appl", Environ. Microbiol., 72, pp.686~694 (2006)
- Young, E. O., "Phosphate release from seasonally flooded soils: A laboratory microcosm study", J. Environ. Qual., 30, pp.91~101 (2001)