PENGARUH HERBISIDA GLYFOSAT TERHADAP PERKEMBANGAN POPULASI DAN KERAGAMAN MIKROORGANISME TANAH SERTA PERTUMBUHAN TANAMAN KEDELAI (Glicyne max L) Merr ) PADA ULTISOL

Emalinda, Oktanis and Wahyudi, Ari Prima and Agustian, Agustian (2010) PENGARUH HERBISIDA GLYFOSAT TERHADAP PERKEMBANGAN POPULASI DAN KERAGAMAN MIKROORGANISME TANAH SERTA PERTUMBUHAN TANAMAN KEDELAI (Glicyne max L) Merr ) PADA ULTISOL. Working Paper. Fakultas Pertanian. (Unpublished)

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Abstract

Soil microorganism have well known significant role in plant nutrients cycles and plant nuritents availability. Repeated glyphosat application and unwise used this herbicide may give an impact in soil microoganism population and create a shifts in community structure in soil microcosm. The objectives of this study were to (1) analyze the effects of different glyphosat application rates on soil microoganism population and community structure, and (2) determine its effect on soybean growth. Two series of experiment conducted were : first, herbicide application in culture media containing soil extract and second herbicide application in soil as growth media of soybean. Five treatment and 3 replication arranged in Completey Randomized design were used in both series of experiment. The treatments assy were doses of glyphosat application i,e : without glyposat, 2 ml, 4 ml, 6 ml and ml of glyfosat. Duncan’s new multiple range test were used to compare the results obtained in this experiment. Total population obtained in 2 ml application of glyphosat in soil extract agar medium are 111.1 x 5.05 106 g –1 0f soil or decreasing ± 75%. The glyfosat application have only influence to fungi population but not the total population in limed soil extract agar medi decrease and have the same pattern with the population. The glyfosat application in second series experiment using soil media have no effect to the total population observed and soybean growth.

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