Abstract
The production of sugarcane is constantly growing in Brazil, and by the 2016/2017 season, it is estimated to have reached 691 million tons. However, productivity has not shown significant increase, this is due largely to inadequate nutritional supplementation of sugarcane plantations, especially the micronutrients. The aim of this study was to evaluate the effect of micronutrients application on the billets and quality of sugarcane in the groove of sugarcane plantation. The experiment was carried out in randomized blocks of six treatments, with application of micronutrients sources in the planting furrow, with 4 repetitions. Number of stems, leaf nutrient content, sugarcane yield and total recoverable sugar (ATR) of sugarcane were evaluated. The use of micronutrients Cu, Mn and Zn chelated associated with sources of K2O, B and Mo promoted increased productivity of billets (TCH) 10 and 15% with doses of 1.0 and 1.5 L ha-1 complex nutrient respectively. The exclusive application of Boric Acid and Zinc Sulphate in dosages of 2.03 kg ha-1 did not increase the productivity of sugarcane. Nutrient sources applied on billets did not result in increases in technological quality of sugarcane, assessed by ATR. Key words: Saccharum spp, boron, copper, zinc, manganese, molybdenum, fertilization, soil fertility.
Highlights
The sugarcane industry is of great economic, social and strategic importance to Brazil, and the world at large due to the sustainable use of biomass energy (Agrianual, 2015)
The number of culms was not affected by the application of micronutrient sources on the sugarcane stalks (Table 2)
It is noteworthy that the average number of stems found in this study (11.9 tillers per meter) is adequate and sufficient to ensure high productivity (Weber et al, 2001).Different letters differ according to Tukey's test at 5% probability
Summary
The sugarcane industry is of great economic, social and strategic importance to Brazil, and the world at large due to the sustainable use of biomass energy (Agrianual, 2015). Projection for the crop production in Brazil in 2016/2017 was around 30 billion liters, slightly lower than production in the previous harvest, because of climatic factors and nutrition of sugarcane plantations. Domestic consumption for 2018 is projected at 30.3 billion liters and exports at 11.3 billion (Agrianual, 2015). There are many agronomic techniques used in the production of sugarcane, such as the choice of suitable varieties of the soil and climate, conservation and chemical correction of soil, pests and weeds control, etc.
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