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

Using of Biofertilizers and Some Micronutrients in Improving Onion Productivity under Siwa Oasis Conditions

“…When compared to the control, the treatment of micronutrients increased the amount of Fe and Cu that accumulated. In general, the largest micronutrient accumulation in onion was favored by the combined application of the three micronutrients with the highest dose of micronutrients (Bertino et al, 2022). 8) indicate that application of treatments significantly affected the development, yield, and microbial community in the rhizosphere of inoculated plants compared to the control, the interaction treatments between biofertilizer inoculation and micronutrient foliar application had the most positive effects on onion plant growth, yield, and microbial activity in the rhizosphere.…”

Optimizing Nitrogen Nutrient Management for the Sustainable Enhancement of Secondary Metabolites and Yield in Onion Cultivation

“…The intricate relationship between these fertilizers and the biochemical processes within the onion plants underscores the need for targeted investigations to optimize their application for enhanced nutritional content [16,17]. The application of boron, copper, and zinc ions has been shown to favor a greater accumulation of micronutrients in onion bulbs [18]. However, studies incorporating Fe as an additional fertilization element, a crucial micronutrient for the photosynthesis process [19], are limited or lacking.…”