Microbiological activity in soil under wheat

Abstract

The investigation included examining the effect of soil compaction, soil depth and vegetation period on the number of microorganisms in soil covered with wheat. The soil samples were taken twice during the vegetation period (March, June 2007) from the depths of 0-30cm and 30-50cm, both from the central (loosing) and compacted parts of the lot. With all groups of microorganisms, apart from fungi and oligonitrophyls, the greatest number was observed in the central part of the lot. All groups of microorganisms were more abundant in ploughing layer of soil (0-30cm). The total number of microorganisms, ammonifiers, actinomycetes and oligonitrophyls was greater at the beginning of the vegetation period, whereas the total number of fungi and azotobacter was greater at the end of the vegetation period.

U radu je ispitivan uticaj sabijenosti zemljišta, dubine i perioda vegetacije na brojnost mikroorganizama u zemljištu pod pšenicom. Zemljište je uzorkovano sa dubine 0-30 i 30-50 cm, sa centralnog (rastresitog) i sabijenog dela parcele (uvratine), dva puta tokom vegetacije pšenice (mart i jun 2007). Kod svih grupa mikroorganizama, osim kod gljiva i oligonitrofila, brojnost je bila veća u centralnom delu parcele.Sve grupe ispitivanih mikroorganizama su bile brojnije u oraničnom sloju zemljišta (0-30 cm). Ukupan broj mikroorganizama, amonifikatora, aktinomiceta i oligonitrofila bio je veći na početku vegetacije, a gljiva i azotobaktera na kraju vegetacije.