Growth, nutrient accumulation and yield of onion as a function of micronutrient fertilization

ABSTRACT Micronutrients structurally constitute several enzymes and act as a cofactor of essential proteins to maintain cell function, thereby contributing crop growth yield. The objective this study was evaluate the leaf content, growth, accumulation micronutrients, classification yield onion function fertilization with boron, cooper zinc in two years cultivation. experiments were carried out from June November 2018 2019, soil classified Ultisol, both at Rafael Fernandes Experimental Farm, belonging Universidade Federal Rural do Semiárido, municipality Mossoró, Rio Grande Norte, Brazil. experimental design randomized blocks 15 treatments four replicates. consisted application doses B, Cu Zn, experiments. Contents Zn diagnostic leaf, bulb total, commercial, non-commercial total yields evaluated. Application did not influence number leaves, relation shape, bulb, dry mass onion. respectively 1-2-1 kg ha-1 favored greater bulb. Higher mass, class 1 bulbs produced Experiment 1.