Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60, 173-178
Published online 2013-08-28

Soil structure stability and distribution of carbon in water-stable aggregates in different tilled and fertilized Haplic Luvisol

Vladimír Šimanský

Fakulta agrobiológie a potravinových zdrojov, Slovenská poľnohospodárska univerzita, Tr. A. Hlinku 2, 949 76 Nitra, Slovenská republika

The influence of tillage and fertilization on soil structure stability and the distribution of carbon in water-stable aggregates of loamy Haplic Luvisol were studied. Soil samples from the locality of Dolná Malanta (experimental station of SUA Nitra) were collected (in 2007–2009) from a depth of 0–0.2 m in two tillage variants: (1. conventional tillage, 2. minimal tillage) and three treatments of fertilization: (1. without fertilization, 2. crop residues and NPK fertilizers, 3. NPK fertilizers). The minimal tillage system has a positive effect on both the aggregation processes and sequestration of carbon in size fractions of water-stable aggregates, as well as ploughing of crop residues together with NPK fertilizers. On the other hand, application of only NPK fertilizers had a negative effect on SOM content. Under the minimal tillage system and in treatment with crop residues together with NPK fertilizers, what has been observed is a statistically significant increase in the total organic carbon contents by increasing size fractions of water-stable aggregates. Organic carbon did not influence the aggregation processes with dependence on tillage systems. Under conventional tillage as well as in treatment with ploughing crop residues with NPK fertilizers, a very important effect on aggregation had bivalent cations Ca2+ and Mg2+.


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