| Abstract | Reakcija otopine tla značajno utječe na kemijska, fizikalna i biološka svojstva tla kao i na pristupačnost i
mobilnost hraniva što se reflektira na rast i razvoj biljaka. U poljoprivrednoj proizvodnji ovaj pokazatelj
može biti limitirajući čimbenik. U kiseloj sredini ioni aluminija i mangana mogu imati toksično djelovanje na
biljku te je povećana bioraspoloživost nekih teških metala, a smanjena pristupačnost drugih elemenata. U
alkalnoj sredini biljci je smanjena pristupačnost većine biogenih elemenata, posebno mikroelemenata (osim
Mo). Pri odabiru biljne vrste potrebno je voditi računa o pH reakciji tla jer neodgovarajuće tlo ili biljna vrsta
rezultirat će lošim izgledom, propadanjem biljaka i/ili gubitkom prinosa. Provedenim istraživanjem utvrđeno
je kako grupi jako kiselih tala (pH < 4,5) pripada 22,0 %, kiselim tlima (pH 4,5-5,5) 26,0 %, slabo kiselim
tlima (pH 5,5-6,5) 19 %, grupi neutralnih tala (pH 6,5-7,2) pripada 6,0 %, dok grupi alkalnih (pH > 7,2) tala
pripada 27,0 % od ukupno 105 analiziranih uzorka tala na području Istočne Hrvatske. Nakon provedenog
istraživanja možemo reći da pH-vrijednosti imaju izrazito heterogen raspon vrijednosti za sve istraživane
tipove tala te da je analiza tla neizostavna za poznavanje reakcije tla te samim time i za uspješnu
poljoprivrednu proizvodnju |
| Abstract (english) | Reaction of soil solution have a significant influence on chemical, physical and biological properties of the
soil, nutrition bioavailability which is reflected on the growth and plants development. In agricultural
production this indicator could be a limiting factor. In acidic soil aluminium and manganese ions can have
toxic effects on the plant, bioavailability of some heavy metals are increased and accessibilitiy of other
metalsare reduced. In alkaline soil the accesibility of most biogenic elements to the plants are reduced,
especially microelements (except Mo). When selecting plant species, it is necessary to take care of pH soil
reaction, otherwise inadequate soil or plant species will result in poor plant appearance, plant decay and/or
loss of yield. The study found that the group of strongly acidic soils (pH <4.5) belongs to 22.0%, acidic soils
(pH 4.5-5.5) 26.0%, weakly acidic soils (pH 5.5-6, 5) 19%, the group of neutral soils (pH 6.5-7.2) belongs to
6.0%, while the group of alkaline (pH> 7.2) belongs to 27.0% of the total of 105 analyzed soil samples in
Eastern Croatia . After the research, we can say that the pH values have a very heterogeneous range of values
for all investigated soil types and that soil analysis is essential for knowing the reaction of the soil and thus
for successful agricultural production. |
