Abstract

COSTALES-MENENDEZ, Daimy  and  FALCON-RODRIGUEZ, Alejandro B.. Combination of application forms of chitosan in the development of biofertilized soybean. cultrop [online]. 2018, vol.39, n.3, pp. 71-79. ISSN 1819-4087.

In this work the combined application of seed addition and foliar spraying of a chitosan polymer in the development of soybean plants (Glycine max (L.) Merril), cultivar IS-27, inoculated with the biofertilizer Azofert-S ^® was evaluated. Nodulation and growth variables were determined in phases R2 and R5, as well as the components of crop yield (R8). The experiment was carried out in the winter season, in an experimental area of ​​the National Institute of Agricultural Sciences, using a random blocks design in the field. Prior to sowing, the seeds were treated with a mixture of Azofert-S ^® and chitosan (0,01, 0,1 and 1 g L^-1). These concentrations were applied by foliar spray in phases V2 and R2 of the crop. Combination of both forms of application of chitosan benefited the nodulation and growth of the cultivar in R2 phase, specifically, the number and dry nodular mass, number of flowers, length of the stem, aerial dry mass, foliar area and the concentration of nitrogen in nodules and seeds, when applying 1 g L^-1. In the R5 phase of development of IS-27, only the length of the stem was benefited, while in the harvest it was the number of pods with the application of chitosan at 0,01 g L^-1. The rest of the components of the yield were not stimulated with the combination of the forms of chitosan application. It is possible that the separate application of both chitosan application forms, improve the productivity of the soybean, so it must be demonstrated in later studies

Keywords : biostimulants; Glycine max; inoculation; polymer.

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