Desempenho agronômico da cultura da soja sob uso de adubação foliar

Abstract

Soybean (Glycine max) is characterized as an annual crop belonging to the dicotyledonous class, legume family and Papilionoides subfamily. Currently the fertilizer market for plant nutrition offers several products for foliar fertilization, among these stand out the leaf fertilizers Nitamin® and Supa Moly CoMo® of the company Agrichem do Brasil, intended to provide nitrogen and cobalt/molybdenum, respectively, gradually and supplementing crops. In view of the above, the present study aimed to evaluate the agronomic performance of soybean crop under the use of nitrogen, cobalt and molybdenum via leaf application, applied at the beginning of the reproductive stage. The present work was treated in an area called Área Experimental Elo located in the municipality of Belterra, West of Pará. The experimental design used was randomized blocks with three treatments and four replications. The plots consisted of 11 rows with a spacing of 50 cm between rows, with each row having 12 linear meters, which totaled 66 m2 per experimental plot. Seven quantitative variables were evaluated, namely: No. grains in 10 plants (NG10P); weight of 10 dried plants (P10PD); grain weight of 10 plants (PG10P); final stand (EF); humidity (U); weight of a thousand grains (PMG) and productivity (P). The results obtained denote that although there is no statistically significant difference in relation to productivity, the treatments that were submitted to the use of foliar nitrogen in the R1 stage presented higher averages in comparison to the control. The T2 treatment stood out for presenting greater productivity with a value of 4.78 t ha-1 (79.95 Sc ha-1), obtaining a difference of 6.41 Sc ha-1 in relation to the control and 2.06 Sc ha-1 compared to T3 treatment.