Aplicação de aminoácido e extrato de alga em milho

Abstract

Corn is a crop of great global interest, being one of the main grains in Brazil. To obtain even higher yields in corn cultivation, various cultural treatments are carried out year after year, in order to increase productivity and quality of the product. In this sense, in recent decades, researchers have delved deeper into the use of biostimulants, which promise to bring agronomic yields to the crop, both in quality and productivity. Therefore, the objective of this work was to evaluate the effects of the application of amino acid and seaweed extract on the growth, physiological and yield characteristics of corn plants. The experiment was conducted in Candiba - BA, during the 2023 harvest. The experimental design was carried out in randomized blocks, with 10 treatments and 4 repetitions, being T1) Control; T2) Glutamic Acid 10 mg Kg-1; T3) Glutamic Acid 20 mg Kg-1; T4) Glutamic Acid 30 mg Kg-1; T5) Glutamic Acid 40 mg Kg1; T6) Algae Extract, T7) Glutamic Acid 10 mg Kg-1 + Algae Extract, T8) Glutamic Acid 20 mg Kg-1 + Algae Extract, T9) Glutamic Acid 30 mg Kg-1 + Algae Extract, T10) Glutamic Acid 40 mg Kg-1 + Algae Extract, where the amino acid was applied via seed treatment and the alga extract was applied at stage V3, morphological, physiological and yield analyses were performed. The results indicated that the application of amino acid via seed treatment in association with foliar application of seaweed extract had effects on the morphological variables (length, fresh and dry dough of roots, in addition to height). Regarding the physiological variables, the influence was on leaf temperature and photosynthetic and transpiration rates. For the yield variables, there were increases in corn productivity under the conditions tested. The use of glutamic acid associated with seaweed extract promotes greater root length and fresh mass, photosynthetic and transpiration rates and corn productivity. The recommended dose is 20 mg of glutamic acid in association with seaweed extract.