The experiment was set up in the forest ecosystem with diverse vegetation zones in the area of Istria and the Croatian Littoral. Research included the following systematic soil units: lithic leptosols, rendzic leptosols, rendzic leptosols -eroded, mollic leptosols, chromic cambisol and chromic luvisols. The average quantity of the forest litter in the studied systematic soil units reaches 13.36 t/ha (Tables 1−3). The "wealth" of organic matter in the studied soil units can be presented with the following series: chromic cambisols (CMx) > mollic leptosols (LPm), organogenic, rendzic leptosols (LPk) > lithic leptosols (LPq) > chromic cambisols (CMx) -Terra rossa, chromic luvisols (LVx) > rendzic leptosols (LPk) -eroded. As expected, the lowest value of total nitrogen was found in the lithic leptosols in relation to almost all the other soils, except when compared with chromic cambisol and rendzic leptosols (p < 0.05). The statistically justified higher values of the percentage share of P 2 O 5 in the forest litter were found in chromic luvisols and rendzic leptosols -eroded in relation to the other studied soils. Significantly higher level of copper contamination was inside rendzic leptosols -eroded in relation to the other studied soils. The exception is rendzic leptosols (p < 0.05). A significantly higher zinc content was detected in the lithic leptosols in relation to the other soil units, except for chromic luvisols, while a justifiably higher total lead and cadmium content in the forest litter was observed in chromic luvisols in relation to the other compared soils (p < 0.05).
Spoljar A., Kisic I., Peremin Volf, T., Kamenjak D., Kaucic D.: Influence of climate change on soil water regime in Koprivnica-Krizevci County. Ekológia (Bratislava), Vol. 33, No. 2, p. 178-187, 2014.The influence of climate change on soil water regime was investigated in the area of Koprivnica- -Krizevci County (Republic of Croatia). Water balance calculations were done for three climatic stations using Thornthwaite and Palmer water balance methods. In the 18-year period (from 1991 to 2008), compared with the previously observed 30-year period (from 1961 to 1990), the increase in average mean annual temperature was 1°C. Regarding the global warming, there was an increase in plant water potential during the investigated period. Compared with the previous period and according to Thornthwaite and Palmer methods, there was an increase in water deficit. Negative linear trend in precipitation was detected for all climate stations in the investigated area (p > 0.05) as well as positive linear trend in mean annual temperature (p < 0.05). The calculation of linear trend in water deficit in soil, according to Thornthwaite method, shows that by the year 2020 there could be an increase in water deficit by an average of 13 mm (p > 0.05), whereas according to the Palmer method there could be an increase by an average of 9 mm (p < 0.05 only for the climate station in Krizevci).
Hren (Armoracia rusticana Ph. Garten) je višegodišnja povrtna kultura iz porodice kupusnjača (Brassicaceae). Korijen hrena sadrži visoku razinu vitamina C, minerale (kalij, magnezij, kalcij, fosfor, željezo), glukozinolate, glikozide, glukonasturcin, singrin, asparagin, glutamin, oksidaze i peroksidaze. Uzgaja se zbog zadebljanog podanka (rizoma), a jednogodišnji izdanci podanka koriste se za reprodukciju. U istraživanju provedenom na ekološkom gospodarstvu u okolici Varaždina korištena je autohtona čuvana sorta Ludbreški hren. Cilj istraživanja bio je utvrditi utjecaj organo mineralnih gnojiva dozvoljenih za primjenu u ekološkoj proizvodnji na prinos i sadržaj minerala u podanku hrena. Pokus je postavljen po slučajnom bloknom rasporedu u četiri repeticije i sljedećim varijantama gnojidbe sa organo mineralnim gnojivima dobrog biostimulativnog učinka (Biotech NPK 3:10:5 S+2 MgO u kombinaciji s Grena Biosprint Calcio NPK 9:1:1; Grena Biobase NPK 3:8:8; Grena life NPK 4:6:10 S+2 MgO). Promatrajući sve dobivene rezultate uglavnom je utvrđen pozitivan učinak organo mineralnih gnojiva na istraživane parametre.
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