Resumo

AGUAYO TRINIDAD, Simeón et al. Foliar fertilization with boron on soybean crops. Investig. Agrar. [online]. 2015, vol.17, n.2, pp.129-137. ISSN 2305-0683.  https://doi.org/10.18004/investig.agrar.2015.diciembre.129-137.

Soybean is the most important cash crop in Paraguay. Currently, foliar fertilization is one of the most used techniques to meet trace elements needs, due to its effectiveness and efficiency. In order to evaluate the response of soybean to foliar fertilization with boron (B) on a Rhodic Paleudalf in Itakyry, Alto Paraná, a trial design in randomized complete block with 10 treatments and three replications was performed. The treatments were: 0; 2,8; 3,7; 4,6; 5,6; 6,5; 7,4; 8,3; 9,3 y 10,2 g of B per hectare, applied at  blooming. The variables evaluated were: plant height, number of pods per plant, grain yield and 1,000 seeds weight. Plant height showed no significant statistical difference in values between 57.0 and 60.3 cm, pod number per plant increased by applying B, from 43.3 pods in the control to 48.3 pods per plant. Grain yield also increased, from 3,470 kg ha^-1 in the control to 3,819 kg ha^-1, which implies an increase of 349 kg ha^-1. The weight of 1000 seeds increased from 155 g in the control to 160 g. Yield growth with a B dose of 9.3 g/ ha^-1, compared to that of the control is shown to be quite advantageous, especially when considering a scale production.

Palavras-chave : Glycine max (L.) Merr.; borated fertilization; yield; height; pods.

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