Evaluation of Soil S Pools under 23 Years of Maize Monoculture

Sulfur nutrition is a critical part of proper crop growth and development. In our study, biomass yields (BY) S uptake were investigated on long-term maize monoculture haplic luvisol soil during the 23 years this trial, as well changes in water extractable (Sw), adsorbed (Sads), mineral (Sav), pseudo-total (St) fractions. Treatments used study are: (1) Control (Cont); (2) ammonium sulfate (AS); (3) urea nitrate (UAN); (4) UAN + phosphorus potassium (UAN PK); (5) phosphorus, magnesium, sulfur PMgS); (6) Fallow. Recently, Mehlich 3 method started to be Czech Republic determine content plant available S. Using method, it was found that extracted by (SM3) closely correlates Sav both topsoil subsoil (r = 0.958 1997 0.990 2019, at p < 0.001). We also that, average, entire experiment, all treatments had increased over Cont (135–147%) (291, 192, 180, 246% for AS, UAN, PK, PMgS, respectively). Examining from 2019 (0–30 cm depth), we discovered decrease Sw, Sads, Sav, St fractions an average 34.6%, 65.8%, 42.2%, 78.6% their initial values. The exception AS treatment, which doubled its maintained same levels St, attribute very high dose treatment (142 kg ha?1 year?1). simple balance PMgS lost 142.2 95.3 year?1 other sinks, except uptake, profile (0–60 cm) experiment. Other show significant losses with Given these results, clear generally decreasing attention should paid mainly towards minimizing losses.