Phosphomonoesterase activity under different microbiological soil properties

Abstract

In the present work, effects of microbiological soil properties and phosphomonoesterase activity are presented. The abundances of ammonificators, fungi, actinomycetes, Azotobacter sp., cellulolytic microorganisms, microorganisms that solubilize organic and inorganic P compounds bound to Al, Fe and Ca, have been determined by the dilution method with application of selective nutrient mediums. The first five axes explaines 86% of the total variance. The first axis explains 34.6% of variance and it appears to reflect the processes of microbiological mineralization and immobilization of phosphorus. The second axis explains 25.9% of variance and reflects microbial activity and organic matter accumulation, N biomasses, Azotobacter sp. abundance and acid and alkaline PME activities. Phosphomonoesterase activity in soil depend primarily on soil organic matter and biological factors and can be used as a parameter of plants' uptake of phosphorus, especially in conditions of its low concentration in soil.

U ovom radu ispitivan je uticaj mikrobioloskih svojstava zemljista i aktivnosti fosfomonoestreaze. Brojnost azotofiksatora, gljiva, aktinomiceta, Azotobacter sp., celulolitičkih mikroorganizama, mikroorganizma koji razlazu organske i neorganske jedinjenja vezana za P, Al, Fe i Ca, utvrđene su postupkom razređivanja s primenom selektivnih hranjivih medija. Prvih pet osa objasnjava 86% ukupne varijanse. Prva osa objašnjava 34,6% varijanse, a odražava procese mikrobiološke mineralizacije i imobilizacije fosfora. Druga osa objašnjava 25,9% varijanse i odražava mikrobiološku aktivnost i nakupljanje organske materije, N biomase, brojnost Azotobacter sp. i aktivnosti kisele i alkalne fosfomonoesteraze. Fosfomonoesterazna djelovanja u tlu primarno zavise od organske materije i bioloških faktora i može se koristiti kao parametar biljnog usvajanja fosfora, naročito u uslovima njegove niske koncentracije u tlu.