Changes of agrochemical properties of cambisol under grassland after abandonment
2012
Jancovic, J., Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Travnych Ekosystemov a Krmnych Plodin | Vozar, L., Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Travnych Ekosystemov a Krmnych Plodin | Bacova, S., Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Travnych Ekosystemov a Krmnych Plodin | Kovar, P., Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Travnych Ekosystemov a Krmnych Plodin
Basic agrochemical properties (pH, Cox, Nt, P, K) of brown acidic soil (cambisol) were studied in a grassland (association Lolio-Cynosuretum cristati R. 1937) during the years 1986-2006. Various systems of management (fertilizing + cutting, liming, no management) had different influences on the cambisol qualities. The pH of the soil decreased a fter application of mineral fertilizer and also in the period without anthropogenic interference. A balanced content of oxidizable carbon (Cox) was preserved during the experimental period. The total nitrogen content (Nt) increased in the period of fertilization and after the fertilization. P concentration decreased significantly in the years of fertilization and this trend continued after the absence of fertilization too. K concentration decreased in the period of fertilization, except for the variant with PK nutrition. It increased in all variants in both sampling depths (almost 1.5-fold after a period without management). We found a significant effect of year and depth of soil sampling for most soil characteristics. Variants had not any significant impact on soil characteristics. Between the years there was a relatively great variability of available nutrients (8-75 %). Available P and K had the greatest variabilities (19-96 % and 18-82 %, respectively). Medium and small variabilities were characteristic for pH (9-14 %), Cox (17-19 %) and Nt (8-16 %). Our results indicate that changes in management systems do not automatically mean changes of soil features.
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