Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60, 61-68
Published online 2013-08-28

Changes of agrochemical properties of cambisol under grassland after abandonment

Ján Jančovič, Ľuboš Vozár, Slávka Bačová, Peter Kovár

Katedra trávnych ekosystémov a kŕmnych plodín, Slovenská poľnohospodárska univerzita, Tr. A. Hlinku 2, 949 76 Nitra, Slovenská republika

On the grassland (association Lolio-Cynosuretum cristati R. 1937) with brown acidic soil (cambisol) the basic agrochemical properties (pH, Cox, Nt, P, K) was studied during the years 1986–2006. Various systems of management (fertilizing + cutting, liming, no management) had different influences to the cambisol qualities, but had not so significant effect. The pH of the soil decreased after application of mineral fertilization and also in the period without anthropogenic interference. The balanced content of oxidizable carbon (Cox) preserved during the experimental period. The total nitrogen content (Nt) increased in the period of fertilization and the aftermath of fertilization. The content of phosphorus (P) decreased significantly in the years of fertilization and this trend continued after the absence of fertilization too. The content of potassium (K) decreased in the period of fertilization, except for a variant with PK nutrition. The content of potassium (K) increased on the all variants in both sampling depths of almost 1.5-fold after a period without management. We found a significant effect of year and depth of soil sampling for most of soil parameters. Variants had not significant impact on all evaluated soil characteristics. Between the years there was relatively great variability at the available nutrients values (8–75 %). The available phosphorus had greatest variability (19–96 %) and also potassium (18–82 %). Medium till small variability was characteristic for pH (9–14 %), Cox (17–19 %) and Nt (8–16 %). The results are indicating that changes of management systems mean not automatically changes of soil features.


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