QUALIDADE FISIOLÓGICA DE SEMENTES DE FEIJÃO-CAUPI EM FUNÇÃO DA ADUBAÇÃO FOLIAR E MÉTODO DE PREPARO PARA COLHEITA

Abstract

The production of high quality seeds is of paramount importance to achieve satisfactory yields on a large scale and this is directly related to factors inherent to the mother plant such as mineral nutrition and harvesting method. Thus, the objective of this study was to verify the possible influences of the different doses of the biostimulant, via foliar, and the effect of the use of the desiccant in the pre-harvest of cowpea on the productivity and physiological quality of the seeds. The experiments were conducted at Instituto Federal Goiano – Iporá campus, in the city of Iporá-GO. The cowpea cultivar BRS Nova Era [Vigna unguiculata (L.) Walp] was used, sown manually and the plots were sown on April 13, 2021 and the experiment was drip irrigated. The doses used in foliar fertilization were 0, 100, 200, 300, 400 and 500 ml of the SpeedAdvantage® biostimulant, and the experiment was conducted in 2 methods, where method 1 consisted of waiting for the natural drying of the plants, while method 2 consisted of the use of a chemical product to induce the harvest, the product used in the desiccation was Gramocil at a dose of 200 ml/ha. The number of pods and seed yield were measured. As for the physiological quality of the seeds, the following determinations and tests were carried out: water content, weight of a thousand seeds, germination test, germination speed index, seedling length and dry mass, electrical conductivity, seedling emergence in the field, index emergence speed and accelerated aging. Plants treated with biostimulant and submitted to natural drying showed a significant increase in productivity, while the use of chemical desiccation interfered with seed quality.