Crescimento e desenvolvimento da cana de açúcar em função da adubação nitrogenada em cobertura

Abstract

Sugarcane is a crop considered easy to be implanted and managed, mainly due to production conditions and low cost. Improper handling, especially of nitrogen fertilization, can lead to severe losses in productivity. Nitrogen is an indispensable nutrient for plant development and is required in high quantities. Plants absorb nitrogen in the form of ammonia (NH4 +) and nitrate (NO3-), simple nitrogen compounds. Urea is the most used nitrogen fertilizer due to the low cost in relation to the other fertilizers has a higher concentration of nitrogen in relation to the other fertilizers. The use of urea allows the complementation of the necessary amount of nitrogen in the soil in order to obtain better productivity in the crops. Urea can reduce costs for fertilization, transportation, storage, and a better pH for plants when compared to other fertilizers. The fertilizer used in this work, Nitro mais® is a nitrogen fertilizer that can be applied even under non-favorable conditions in the cover, has the advantage of having low volatilization of its nitrogen, being therefore an alternative solution in relation to other nitrogen sources such as sulfate of ammonia. The objective of this work was to evaluate two nitrogen sources (urea coated with polymersand common urea) at different doses of nitrogen fertilization in the cover.