Abstract
.The formation of soil microaggregate and macroaggregate involves different microbes. A Screenhouse experiment to determine the effect of Arbuscular Mycorrhizal Fungi (AMF) and rhizobacteria on soil microaggregate stability and soil macroaggregate stability (soil microaggregate and macroaggregate stability) had been carried out. The treatments included AMF (control and Glomus sp.) and rhizobacteria (Pseudomonas diminuta, P. diminuta + Bacillus alvei, P diminuta + P malei, P malei). The results showed that inoculation Glomus sp. and rhizobacteria didn’t increase the stability of microaggregates (0.2 mm – 0.3 mm and < 0.2 mm). Inoculation Glomus sp and rhizobacteria increased water stable aggregate (2,83 mm – 4,8 mm, 0,50 mm – 1,00 mm, and 0,30 mm - 0,50 mm) and inoculation Glomus sp increased water stable aggregate (2,00 mm – 2,83 mm dan 1,00 mm – 2,00 mm). The experiment indicated that rhizobacteria didn’t effect soil microaggregate due to silt fraction domination and Glomus sp was involved in the formation of macroaggregate
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