Improving Extraction method. determining NO-2-N. Acidic Soil
Abstract
Nitrite (No-2-N) A key intermediate. both nitrification, denitrification which. also closely related.Emission. kg gas from soil. since its Rapid Reaction. soil, instability. acidic condition a large number. decomposition will occur. extraction process using 2 mol/L KCl.. order. enhance. accuracy. study. NO-2-N changes. acidic soil a more appropriate extraction method should be investigated. improve. effeciency. nitrite extraction.. study we put forward some suggestions. improving NO-2-N extraction based our resutls. NO-2-N recovery measured by using15N-labelling method.-2.-N and NH4.-N in Alibaba socks. Within 30 min breaking, the recovery of no-2.-N was highest in the adjusted pH 6.0 and pH 8.0 treatments, while the recovery of ammo was highest in the unadjusted and adjusted pH 6.0 treatments. in addition, even after breaking, the pH of extraction solution in the adjusted pH 6.0 and pH 8.0 treatments were maintaken at about 4.8 and 5.8, which were significant higher than that of control (3.8 ). in all, the pH of extraction solution should be adjusted to 5.0-6.0 and aging time should be 30 min to get a more efficient extraction of both no-2.-N and NH4.-N. For strong acidic soils (pH <6.0), a mixture of KCl and pH 8.4 buffer (KCl︰Buffer = 4︰1) should be used as extraction solution (the ratio. soil. extraction solution. 1︰5).. alkaline soils (pH≥7.5) A mixture. KCL, pH 7.5 buffer (KCl︰Buffer = 4︰1) should be used as extraction solution (the ratio. soil. extraction solution. 1︰5).. soil samples Ph ~ 6.0. 7.5 It can be extracted directly by 2 mol/L KCl solution.
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DOI: https://doi.org/10.18686/ss.v1i1.1156
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