Selection and Effects of Different Bentonite as Thickening Agent of Seed Coating Formulation

Ten types of bentonite from different sources were tried in seed coating formulation. Based on the study of swelling effect, suspension stability and other properties some types of bentonite were selected. The dosage, effects and suspension stability of bentonite cooperated with XG were also studied. The results showed that bentonite 4#, 5# improved suspension stability of the systems at the dosage of 0.5%.Bentonite 6# at the dosage of 0.1% gave the same result. It was suggested that proper bentonite can be selected in different formulations according to its thickening and thixotropic ability.