Abstract

MENESES, Natália; MENDOZA-CORTEZ, Juan Waldir  and  CECILIOFILHO, Arthur Bernardes. Potassium Fertilization of Sweet Corn in a Potassium-rich Soil. Agrociencia Uruguay [online]. 2017, vol.21, n.2, pp.54-58. ISSN 1510-0839.

Hybrids with high yield potential and nutritional requirement, higher cost of fertilizers and environmental impact caused by theexcessive use of nutrients, are factors that require improvements in the management of fertilization of sweet corn. An experimentwas carried out from 24/4 to 25/8 2014, in São Paulo, Brazil, aiming to evaluate potassium (K) rates (0, 50, 100, 150, 200and 250 kg ha-1 de K2O), in the yield of supersweet corn ‘GSS 41243’, main cultivar used by agribusiness in São Paulo, Brazil.The culture was established in a K rich Rhodic Hapludox soil (4,2 mmolc dm-3 exchangeable K). Potassium rates did notinfluence total, commercial and grain productivities, grain yield, length and diameter of the ear, or leaf potassium content.Therefore, K fertilization in supersweet corn ‘GSS 41243’ in a K rich Rhodic Hapludox soil can be dispensed.

Keywords : Zea mays convar. saccharata var. rugosa; K excess; plant nutrition.

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