Assessment of the Perennial Plants Irrigation Impact on the Structural Microaggregates Stability and the Risk of the Soil Crusting
Procena uticaja navodnjavanja višegodišnjih zasada na stabilnost strukturnih mikroagregata i rizik od stvaranja pokorice
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Author
Pivic, Radmila
Maksimovic, Jelena
Margarino, Ferdinando
Dinic, Zoran
Josic, Dragana
Stanojkovic-Sebic, Aleksandra
Keywords
perennial plantsirrigation
microaggregates stability
soil crusting
višegodišnji zasadi
navodnjavanje
stabilnost strukturnih mikroagregata
pokorica
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The soil structure is very dynamic measure, especially in the topsoil horizon, given that changes can occur under the influence of climatic factors, cultivated plants, amelioration measures and tillage. In the area of the Danube region, in September 2015, it was conducted the study on the effect of the perennial plants irrigation on the structural microaggregates stability and the risk of the soil crusting on three selected locations in agricultural soil samples taken from the surface layer (0-30 cm). In the analysed soil samples in disturbed state it was determined the ratio between the total content of particles of less than 0.002 mm (clay) in soil samples prepared with sodium pyrophosphate and the content of such particles in soil suspension prepared with water. The degree of the stability of microaggregates was expressed according to Vageler, in relation to their estimated stability index. The risk of the soil crust formation was determined according to a Van der Watt & Claassen pattern. The obtained results showed that the soil samples have stable to very stable degree of the structural microaggregates stability and that an irrigation did not significantly affect the analysed parameter. In the analysed samples the risk of the soil crusting is high to borderline. Struktura zemljišta je veoma dinamična veličina, naročito u orničnom horizontu, koji je i ispitivan, obzirom da do promena može doći pod uticajem klimatskih činilaca, gajenih biljaka, primenjenih meliorativnih mera i obrade. Na području Podunavske oblasti, tokom septembra 2015. godine, sprovedena su ispitivanja uticaja navodnjavanja višegodišnjih zasada na stabilnost strukturnih mikroagregata i rizik od stvaranja pokorice na tri odabrane lokacije u uzorcima poljoprivrednog zemljišta iz površinskog sloja (0-30 cm). U ispitivanim uzorcima zemljišta u poremećenom stanju, određen je stepen stabilnosti mikroagregata, izražen prema Vageler-u, na osnovu određenog odnosa između ukupnog sadržaja čestica manjih od 0,002 mm (gline) u uzorku zemljišta pripremljenog sa natrijum pirofosfatom i sadržaja tih čestica u suspenziji zemljišta pripremljenog sa vodom. Određen je i rizik od stvaranja pokorice, po obrascu Van der Watt & Claassena. Dobijeni rezultati pokazuju da ispitivani uzorci zemljišta imaju stabilan do vrlo stabilan stepen stabilnosti strukturnih mikroagregata i da navodnjavanje nije u znatnoj meri uticalo na ispitivani parametar. U ispitivanim uzorcima rizik od stvaranja pokorice je visok do graničan.