Microbial activity - indicator of effect nickel on biological activity of soil

Abstract

Our study showed that the Ni concentration of 2,0 mg Ni kg-1 soil significantly reduced the total number of microorganisms and the numbers of ammonifiers, actinomycetes and fungi. The number of Azotobacter was increased in the presence of Ni. The Ni concentration of 2,0 mg Ni kg-1 soil was decreased dehydrogenase activity in soil under the wheat, the sugerbeet and soyabean. DHA was increased in the presence of Ni in soil under the corn and the sunflower.

Nikal u količini 2,0 mg Ni kg-1 zemljišta uticao je značajno na smanjenje ukupnog broja mikroorganizama, brojnost amonifikatora, gljiva i aktinomiceta u zemljištu pod svim ispitivanim biljnim vrstama. Međutim, nikal je uticao je pozitivno na brojnost Azotobacter-a, sem u zemljištu pod šećernom repom. Prisustvo nikla uticalo je na samanjenje DHA u zemljištu pod pšenicom, šećernom repom i sojom, ali u zemljištu pod kukuruzom i suncokretom aktivnost ovog enzima je povećana.