| Abstract | Cilj ovog rada bio je utvrditi kemijska svojstva površinskog horizonta rigolanog tla iz pseudogleja obronačnog na gornjoj, srednjoj i donjoj trećini padine u dva vinograda na različitim nagibima (10% i 20%). Istraživanje je provedeno na rigolanom tlu iz pseudogleja obronačnog pod vinogradarskom proizvodnjom, na pokušalištu Agronomskog fakulteta Jazbina u Zagrebu, na kojem je prisutna plošna erozija. Uzorkovanje tla provedeno je na gornjem, srednjem i donjem dijelu padine nagiba 10% i dužine 40 m, te padine nagiba 20% i dužine 55 m iz površinskog (0-30 cm) horizonta tla u 3 ponavljanja. Ukupno je analizirano 18 uzoraka tla na pH (HRN ISO 10390:2005), količinu humusa (metoda po Tjurinu JDPZ, 1966.), hidrolitski aciditet i parametre adsorpcijskog kompleksa tla (metoda po Kappenu, JDPZ, 1966), te fiziološki aktivni K2O i P2O5 (AL – metoda JDPZ, 1966). Reakcija tla (MKCl) na obje padine je jako kisela. Na blažoj padini (3,78 – 3,94) najveća pH vrijednost utvrđena je na donjem dijelu padine, a na strmijoj padini (3,83 – 4,09) na sredini padine. Istraživana tla su slabo humozna (0,75 - 2,02% blaža padina; 1,16 - 1,97% strmija padina), uz maksimalne vrijednosti na sredini obje padine. Hidrolitski aciditet varira 17,25 - 23,25 mmolekv. H+/100 g na blažoj i 16,5 - 22,0 mmolekv. H+/100 g tla na strmijoj padini, uz minimalne razlike između dijelova padine i bez izražene pravilnosti. Stupanj zasićenosti bazama adsorpcijskog kompleksa tla je nizak do osrednji na obje padine (25,8 - 44,6% na blažoj, 24,2 - 50,5% na strmijoj). Na strmijoj padini utvrđeno je smanjenje stupnja zasićenosti bazama od gornjeg prema donjem dijelu padine, dok su kod blaže padine vrijednosti bile ujednačene. Istraživana tla su slabo opskrbljena fiziološki aktivnim fosforom (0,21 - 8,97 mg P205/100 g tla), a osrednje s fiziološki aktivnim kalijem (10,0 - 24,5 mg K2O/100 g tla). Na obje padine maksimalne vrijednosti P2O5 i K2O utvrđene su na sredini padine. Nagibi 10 i 20%, uz dužine padina 40 i 50 m, na rigolanom tlu iz pseudogleja pod vinogradarskom proizvodnjom nisu uvjetovali znatnije razlike u istraživanim kemijskim svojstvima tla između pojedinih dijelova padine, niti između padina. |
| Abstract (english) | The aim of this work is to establish chemical properties of the surface horizon of rigosol from pseudogley on slope, on the top, middle and bottom thirds of the slope in two vineyards at different slope (10% and 20%). Research has been conducted on rigosol from pseudogley on slope under vineyard production, at testing nursery of the Faculty of Agriculture “Jazbina” in Zagreb, at which soil erosion is present. Soil sampling has been conducted on the top, middle and bottom thirds of the slope with 10% and 40 m length and 20% and 55 m length from surface horizon of the soil (0– 30 cm) in 3 repetitions. Overall 18 samples have been analysed to pH (HRN ISO 10390:2005), humus content (method by Tjurin JDPZ, 1966.), exchangeable acidity and parameters of adsorption complex (method by Kappen, JDPZ, 1966), and physiologically active K2O and P2O5 (AL – method JDPZ, 1966.). Soil reaction (MKCl) on both slopes is very acidic. On milder slope (3,78 – 3,94) maximum values established at the bottom part of slope, and on steeper slope (3,83 – 4,09) at the middle slope. Investigated soils are really poor in humus content (0.75 – 2.02 % milder slope; 1.16 – 1.97 steeper slope), with maximum values at the the middle of both slopes. Exchangable acidity varies between 17.25 – 23.25 mmoleq. H+/100 g of soil on milder slope and between 16.5 and 22.0 mmoleq. H+/100 g of soil on steeper slope, with minimal differences between parts of the slopes and without any pronounced regularities. The saturation of adsorption complex is low to medium on both slopes (25.8 – 44.6% on milder and 24.2 – 50.5% on steeper slope). On the steeper slope, the saturation of adsorption complex was reduced from upper to lower part of slope, while on milder slope values were uniform. Researched soils are poorly supplied with physiologically active phosphorus (0.21 – 8.97 mg P2O5/100 g of soil), and mediocre with physiologically active potassium (10.0 – 24.5 mg K2O/100 g of soil). On both slopes maximum values were established at the middle slope. Slopes with 10% and 20%, alongside the lengths of 40 and 50 m, on rigosol from pseudogley on slope under vineyard production didn't have any major effects on the analysed chemical properties of soil between seperate parts of the slopes, not between slopes themselves. |
