The effect of different kinds of fertilizers on the number of azotobacters in the smonitza type of soil under maize and the yield of maize
2005
Mandic, L., Faculty of Agronomy, Cacak (Serbia) | Djukic, D., Faculty of Agronomy, Cacak (Serbia) | Stevovic, V., Faculty of Agronomy, Cacak (Serbia)
High mineral nitrogen rates (120 and 150 kg/ha) considerably decreased the number of azotobacters in the smonitza under maize. The similar effect was produced by liquid manure during the first two study years, whereas solid manure caused the highest stimulation in the same period. The rhizospheric soil was found to be more biogenous than the edaphospheric one. The toxic effect of the high nitrogen rates was considerably lower in the rhizospheric soil as well as in the periods of increased soil humidity. The most important increase in the maize silage yield during the first study year resulted from medium nitrogen rate (120 kg/ha), whereas in the other years, the higher yield of maize silage and grain in the variant with 150 kg/ha was statistically insignificant. In all the study years, except in the first one, organic fertilizers did not significantly increase the yield of maize silage and grain. The applied Azotobacter strain caused the statistically insignificant increase in the mentioned productive traits of this crop.
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