Abstract
The study of micronutrients accumulation as a function of plant development stage is of fundamental importance to subsidize strategies for fertilizer application and minimum amount to maintain soil fertility. This study evaluated micronutrient accumulation in two maize cultivars at different development stages. The experimental design was randomized blocks with four replications in split-plots, with two maize hybrids as the plots and sampling time according to development stages as sub-plots. Maize accumulated minimum amounts of B, Cu, Mn, and Zn in the initial stages of development, and the maximum accumulated values were observed after 100 days seedling emergency. The evaluated hybrids accumulated maximum of Zn and Cu close to physiological maturity. Maize plants accumulate nutrients in the above ground parts as follows: Zn > Mn > Cu > B. The total amount of nutrients required to produce one ton of corn is: 0.0009 kg B; 0.019 to 0.02 kg Cu; 0.042 to 0.046 kg Mn; 0.100 to 0.194 kg Zn.
Highlights
Nutrient requirement of a plant is determined by the total amount of nutrients absorbed
The study of macro and micronutrients accumulation in maize as a function of plant development stage is of fundamental importance to subsidize strategies determining the amount of fertilizer and the time of application and minimum amount that should be reapplied to maintain soil fertility (BULL, 1993; BRASIL et al, 2007; DEUNER, et al, 2008)
After defining the doses to be applied on the culture, step is to know nutrient absorption and accumulation during the different plant development stages, identifying the times of greater demand for each element
Summary
Nutrient requirement of a plant is determined by the total amount of nutrients absorbed. Knowledge about these amounts allows the estimation of the exported amounts through grain harvest and what will be returned to the soil by the litter (BULL, 1993). The study of macro and micronutrients accumulation in maize as a function of plant development stage is of fundamental importance to subsidize strategies determining the amount of fertilizer and the time of application and minimum amount that should be reapplied to maintain soil fertility (BULL, 1993; BRASIL et al, 2007; DEUNER, et al, 2008). Among the official fertilization recommendation for maize in Brazil, those proposed by
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