Comparison of biological and chemical properties of arable and pasture Solonetz soils

Gangwar, R. K. and Makádi, M. and Fuchs, M. and Csorba, Á. and Michéli, E. and Demeter, I. and Szegi, T. (2018) Comparison of biological and chemical properties of arable and pasture Solonetz soils. Agrokémia és Talajtan, 67 (1). pp. 61-77. ISSN 0002-1873

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Abstract

Soil samples were collected from salt-affected soils (Solonetz) under different land uses, namely arable (SnA) and pasture (SnP), to investigate the effects of land use on microbiological [basal soil respiration (BSR), microbial biomass carbon (MBC), dehydrogenase activity (DHA) and phosphatase activity] and chemical properties [organic carbon (OC), humic ratio (E4/E6), pH, electrical conductivity (EC), ammonium nitrogen (NH_4-N), nitrate nitrogen (NO_3-N), available forms of phosphorus (P₂O₅), potassium (K₂O), calcium (Ca²⁺), magnesium (Mg²⁺), sodium (Na⁺)] and on the moisture content. The results showed that the two sites, SnA and SnP, were statistically different from each other for all the microbiological and chemical parameters investigated except Na+ and moisture content. Higher values of MBC (575.67 μg g^-1), BSR (9.71 μg CO₂ g^-1 soil h^-1), DHA (332.76 μg formazan g^-1 day^-1) and phosphatase activity (0.161 μmol PNP g^-1 hr^-1) were observed for the SnP soil. Great heterogeneity was found in SnP in terms of microbiological properties, whereas the SnA plots showed more homogeneous microbiological activity due to ploughing. 75.34% of variance was explained by principal component one (PC1), which significantly separated SnA and SnP, especially on the basis of soil MBC and P₂O₅. Moreover, it was concluded that the pasture land (SnP) was microbiologically more active than arable land (SnA) among the Hungarian salt-affected soils investigated.

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