Extratos de algas no desenvolvimento inicial de cana-de-açúcar
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Abstract
Sugarcane plays an important role in Brazilian agribusiness, as an alternative to the use of fossil fuels. However, the productive sector is still looking for new solutions that favor increased productivity combined with sustainability. Among the different ecological alternatives, the use of seaweed extracts as biofertilizers can be highlighted. For sugarcane, some studies with seaweed extracts are available, but to our knowledge, there is still a lack of studies specifically trying to understand the effect of seaweed extracts on physiological processes. In this context, the objective of this work is to study the influence of seaweed extracts on the initial development of sugarcane. For that, two extracts were considered, the first is a composition of Lithothamnion calcareum, and the second Hypnea musciformis and Ascophylum nodosum. These two products were authorized for three doses, in four sugarcane varieties, namely: IACCTC07-8044, RB 975201, RB966928, RB975242. The experiment, treated in a greenhouse for 140 days, and in 35, 70, 105 and 140 the biometric variables were collected, such as number of culms, central culm height, diameter. The interaction of seaweed extracts in the initial growth of sugarcane was experimented, it presented a response surface for the varieties. Considering the situations in which there is a significant effect, the varieties IACCTC07-8044 and RB966928 tend to show a greater response to biofertilizers and RB975201 showed a lower response to the application of Algue® and Biomax Nutri Plus®. As for the results by, it is determined that for stem height the presence of Algue® favored the varieties IACCTC07-8044 and RB966928 and Biomax Nutri Plus® favored RB975242. However, for diameter and number of tillers Biomax Nutri Plus ® becomes the biofertilizer with the best response among those analyzed
