FRIGHETTO, R. T. S.

OLIVERA, D. A.

TOKESHI, H.

VALARINI, P. J.

Portuguese

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ACTION OF EFFECTIVE MICROORGANISMS (EM) IN SOILS OF INTENSIVE AGRICULTURAL SYSTEMS IN BRAZIL P J Valarini, R S T Frighetto, H Tokeshi and D A Olivera EMBRAPA/CNPMA, Rodovia SP 340 km 127 .5, Janguarina, CP 069-CEP 13820-00 SP, Brazil Experiments carried out in 1995 clearly demonstrated that soil borne diseases are the most restricti v e factors afTccting crop production in Guaíra, SP, Brazil. Thc high dcgree of soil compaction was proportional to lhe severity of diseases caused by Sclerotinia sclerotiniwn, Fusarium solani mui Rhizoctonia solanum. Therefore, trials wcre installed in six farms with appropriate contrais to determine the effects of EM as a substitute for convcntional chemical systcms, using a forcst as a sustainablc systcm for comparison. Thc soils wcrc cvaluated for biological anel selected chemical and physical properties. The edaphic respiration was highcr in thc EM treated anel forest soils, along with dchydrogenase activity and carbon hiomass. Thc 15 polysaccharidcs were greater in soils of the conventional chemical no till farming systcms. Matrix correlation analysis illustrated that microbial polysaccharides decreased significantly in relation to biological parameters used. There was no correlation between dehydr?genase activity and biological parameters ·in terms o f soil recovery. The increase in biological activity induced reduction o f polysaccharides can be associated to soil structural degradation and increase in the incidence of pathogens and diseases. This was also shown by the indices of soil compaction. The role of EM in enhancing soil quality is presented on the basis of these results. 

Action of effective microorganisms (em) in soils of intensive agricultural systems in Brazil.

http://www.alice.cnptia.embrapa.br/bitstream/doc/1057828/1/1997AP028FrighettoAction15191.PDF

Action of effective microorganisms (em) in soils of intensive agricultural systems in Brazil.

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