The effect of chloride and sulphate application to soil on changes in nutrient content in barley shoot biomass at an early phase of growth
Matula J.(Vyzkumny Ustav Rostlinne Vyroby, Prague (Czech Republic))E-mail:[email protected]
The effect of labile sulphur in the soil reserve on nutrient uptake by barley plants was investigated. The experiments were conducted during 18 days on a set of 48 soils. The soils were divided into two variants: A - control soils (with NH4Cl application) and B - response soils (with (NH4)2SO4 application), a uniform dose of 26 mg N/kg soil was used. After the experiment, concentrations of N, N-NO3-, S, S-SO42-, P, K, Mg, Ca, Na, Mn and B were determined. Paired t-test revealed significant differences between the sets of data on variants A and B in barley yield and concentrations of S, sulphate, nitrate, P and B in barley plants. Sulphate variant (B) led to higher yield of barley, higher concentrations of S, sulphate and B and lower concentrations of nitrate and P in comparison with the variant A. A substantial decrease in nitrate concentration was related to better utilisation of plant N after the nutrient status of soil had been adjusted with S. P concentration in barley adequately corresponded to the soil reserve of labile P. Higher concentration of B in barley could potentially be related to the depression of P uptake after sulphate application.
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