Bioestimulantes associados a fungicidas e fitoprotetores no desempenho agronômico da soja

Abstract

Biostimulants are substances capable of modulating diverse events in the physiology of plants, as well as fungicides and their phytotoxic effect on plant metabolism, showing promising results regarding productivity. The objective of the present work was to evaluate the effect of biostimulants associated with fungicides and phyto protectors on soybean agronomic performance. Consisting of three trials, all with eight treatments and four replicates each being the randomized block design. These three trials received the same treatment arrangement: the control received no treatment; treatment 1 (T1) consisted only of biostimulant + fungicide-based seed treatment in stages V4 and R0; Treatment 2 consisted of (T1) + biostimulant and foliar fertilizer in V4; the treatment 3 consisted of (T2) + leaf protector in V4, treatment 4 (T4) consisted of T3 + biostimulant and foliar fertilizer in stage R0; in the treatment 5 the same arrangement of the T4 was used and leaf protector in R0 was added; in treatment 6 the arrangement of T5 + K-based leaf fertilizer in the R0 stage was repeated; and in the treatment 7: the T6 + K-Base Foliar Fertilizer was used in the R3 stage. The first experiment evaluated the application of phytopathogenic amino acids from algae extracts in the soybean crop where it was concluded that applications in the R0 and R3 stages did not show a significant difference, whereas the applications in the V4 stage promoted an increase in the mass characteristics of thousand grains, number of internodes, number of grains per pod and number of grains per plant, and productivity. The second assay evaluated the response of soybeans cultivated under the application of biostimulants from algae extracts, where positive responses were obtained only for the mass variable of one thousand grains under applications of biostimulants in V4. The objective of the third experiment was to evaluate the response of soybean cultivated under application of NAA, macro and chelated microelements where it was verified that conjugated applications in R0 promoted a higher plant height, yield and grain weight.