One of the major priorities for today’s agriculture is the implementation of a sustainable system, context where zeolite could feet very well due to its influence in production increasement and soil quality. The results achieved by the research conducted until present days recommend the use of zeolite in agriculture being highlighted the positive role of zeolite in plant nutrition and in the stability of microbial community. In Romania there is a lack of knowledge concerning the effect of zeolite on soil microbial community. Therefore thru this research we followed the effect of zeolite on soil-microorganism on three of the most used cultures from our country. The experiences were installed in Agricultural Research Development Turda, Cluj County on an argillic (clay illuviated) soil. The climate specific for the experimental area is continental, with an annual average temperature of the last 57 years of 8.40C and an annual sum of rainfall of 540 mm. The biological material consists in soybean (Glycine max L. Merril , Felix variety), spring barley (Hordeum vulgare L., Romaniţa variety) and corn (Zea mays L., Turda Star variety). The experience covers 6 experimental plots, in 2 replicates. Each plant was cultivated in 2 experimental variants (control and a treated variant), as follows: soybean (S1 – control variant, untreated; S2 – treated with 100 kg/ha zeolite), spring barley (O1 – control variant, untreated, O2 - treated with 150 kg/ha zeolite) and corn (P1 – control variant, untreated; P2 - treated with 200 kg/ha zeolite). The evaluation of the decomposition groups was undertaken on 15 different substrates, responsible for the decomposition of amino sugars, amino acids, neutral sugars and carboxylic acid. The profile of microbial community was asses using MicroResp method. Determination were performed on the University for Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, on the Laboratory for Soil microbiology. The experimental data were statistically analyzed using Statistica program, version 10. Our results showed that the input of zeolite has a positive effect on the stability of soil microbial community, the highest value being achieved on the group specia1ized in the decomposition of oxalic acid.

microbial comunity, soybean, spring barley, corn

Presentation: oral