Soil phosphorus and potassium availability in long-term field experiments with organic and mineral fertilization

M. Káš, G. Mühlbachová, H. Kusá and M. Pechová
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M. Káš: Crop Research Institute, Prague, Czech Republic
G. Mühlbachová: Crop Research Institute, Prague, Czech Republic
H. Kusá: Crop Research Institute, Prague, Czech Republic
M. Pechová: Crop Research Institute, Prague, Czech Republic

Plant, Soil and Environment, 2016, vol. 62, issue 12, 558-565

Abstract: The effect of organic, mineral and combined organic and mineral fertilization of soils on the winter wheat yields and nutrient contents in soils was evaluated in long-term field experiments. Two sites with different soil characteristics were evaluated - Lukavec u Pacova (cambisol) and Ivanovice na Hané (degraded chernozem). The type of fertilization influenced wheat yields. Nutrient uptake by winter wheat was higher under nitrogen (N) fertilization, which resulted in a negative balance of phosphorus (P) and potassium (K) and to a decrease of nutrient contents in the more fertile soils at Ivanovice na Hané. Two soil tests (Mehlich 3 method and NH4-acetate method) were used to determine P and K availability. The mineral nitrogen fertilization negatively and significantly affected NH4-acetate extractable concentrations of nutrients in the soils and these were lower in comparison with concentrations of P and K determined by Mehlich 3 method. Relative availability of P in alkaline soils from Ivanovice treated with mineral N increased while the soil pH decreased.

Keywords: Mehlich 3 soil test; NH4-acetate soil test; Triticum aestivum; nutrition; macronutrient; nutrient availability (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:62:y:2016:i:12:id:534-2016-pse

DOI: 10.17221/534/2016-PSE

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