Use of sorption-stimulating preparations for seed treatment and interaction of soil allelotoxins with plants

Abstract

The influence of soil allelotoxicity on the application efficiency of a sorption-stimulating preparation used for pre-sowing seed treatment was studied. A comparison was also made of the negative effects of allelotoxicity of soils and water extracts from these soils on the seed development. From the analysis of the results, it followed that the development of seeds is influenced only by allelotoxins contained in the soil in the immediate vicinity of plants, entering them, apparently, due to exchange sorption. This mechanism of interaction of soil allelotoxins with plants explains well the effectiveness of stimulating pre-sowing seed treatment with sorption preparations, the sorption capacity of which is several orders of magnitude less than the amount of allelotoxins contained in the soil. A comparison was made that effect of sorption-stimulating preparations during the pre-sowing treatment of seeds and when introducing into the soil 30 times larger quantities. It was found that result of the preparations use does not depend on the method of their application, which confirms the correctness of the proposed mechanism of interaction between soil allelotoxins and plants. Results analysis of the introduction into the soil the sorption-stimulating preparations suggested the existence of a microbiological factor in reducing the allelotoxicity of soils, the use of which made it possible to significantly increase the effectiveness of the sorption-stimulating preparations.