Effects of organic and mineral fertilisers on biological properties of soil under seminatural grassland
2008
Ondrasek, L.,Slovenske Centrum Polnohospodarskeho Vyskumu, Banska Bystrica (Slovak Republic). Vyskumny Ustav Travnych Porastov a Horskeho Polnohospodarstva | Cunderlik, J.,Slovenske Centrum Polnohospodarskeho Vyskumu, Banska Bystrica (Slovak Republic). Vyskumny Ustav Travnych Porastov a Horskeho Polnohospodarstva
The effect of mineral fertilisers (60 N + 30 P + 60 K kg/ha or 120 N + 30 P + 60 K kg/ha) and farmyard manure (12 or 24 t/ha) application on soil biological and chemical properties were studied in a seminatural grassland at Radvan (Central Slovakia, altitude 480 m, loamy to sandy-loamy Cambisol) from 2004 to 2006. CO2 production, intensity of total N mineralisation (TMN), rate of nitrification (NIT), total C content in microbial biomass (MB-C), Cox, Nt, P, K, Mg and the ratio humic acids : fulvic acids (HA:FA) were monitored. The application of mineral fertilisers with the highest N rate significantly increased TMN and NIT, mainly in 2004 and 2005, whereas the application of manure showed the strongest effects on soil biological indicators. The manure applied at 12 t/ha significantly increased soil respiration in 2005 and 2006 as well as TMN and NIT throughout the whole research period. It increased also soil pH, MB-C, Nt, Mg, P and Cox.
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