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- W2372017275 abstract "In order to evaluate the effect of 0.5mol L-1 NaHCO3 as a universal extractant for soil nitrogen(N), phosphorus(P) and potassium(K), and an extractant for ammonium, 30 soil samples from across China were collected and extracted with 0.5 mol L-1 NaHCO3, N, P and K in the extracts were determined with flow analysis, Mo-blue method and flame spectrometry, respectively.Soil N, P and K availability were determined with pot experiment.Meanwhile, soil N and K were extracted with 1 mol L-1 KCl and 1 mol L-1 neutral ammonium acetate(NAA).Soil N, P and K extracted with 0.5 mol L-1 NaHCO3 correlated with soil nutrient availability significantly(P0.01).0.5 mol L-1 NaHCO3 extracted twice of the amount of 1 mol L-1 KCl, but less K compared with 1 mol L-1 NAA.Nitrate, nitrite, ammonium and total inorganic nitrogen extracted with 0.5 mol L-1 NaHCO3 correlated with the respective form of nitrogen extracted with 1 mol L-1 KCl significantly(P0.01).Furthermore, ammonium extracted with 0.5 mol L-1 NaHCO3 correlated with nitrogen uptake of plant in pot experiment significantly(P0.05).Extraction of soil N and K with 0.5 mol L-1 NaHCO3 was also affected by soil pH.So 0.5 mol L-1 NaHCO3 could be used for N, P and K extraction for soils in China, it was also suitable for soil ammonium extraction." @default.
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- W2372017275 date "2009-01-01" @default.
- W2372017275 modified "2023-09-25" @default.
- W2372017275 title "Extracting of Soil Nitrogen,Phosphorus and Potassium with 0.5 mol L~(-1) NaHCO_3" @default.
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