Abstract
ABSTRACT This study aimed to evaluate sugarcane growth and its agricultural and industrial yield influenced by phosphorus (P) sources and forms of application. The experiment was carried out at the Paisa Sugar Mill, in Penedo-AL, Brazil, from February 2012 to February 2013. The adopted experimental design was a randomized block in a factorial arrangement, with four replicates. The treatments consisted of five doses of triple superphosphate applied in the planting furrow (0, 50, 100, 150 and 200 kg ha-1 of P2O5), and three doses of Bayóvar reactive phosphate rock (0, 100 and 200 kg ha-1 of P2O5) applied in the total area. Phosphorus applied in the planting furrow improved sugarcane quality through the reduction of fiber and increases in purity, corrected pol, total recoverable sugar, ton of pol per hectare (TPH) and ton of sugarcane per hectare (TSH). The Bayóvar reactive phosphate rock promoted increases in stem diameter at 120 days after planting (DAP), TPH and TSH. For the interaction triple superphosphate applied in the planting furrow x Bayóvar reactive phosphate rock applied in the total area, there were significant differences in the number of tillers at 30 DAP, stem diameter at 120 DAP and TSH.
Highlights
The expansion of sugarcane fields in Brazil has been intensified because of the increasing demand for biofuels, especially from ethanol and sugar production, its main product (Ferreira Júnior et al, 2012; Moura Filho et al, 2014)
The experimental area is located on the Coastal Plains and the soil is classified as typical distrophic Yellow Latosol, with medium texture and moderate A horizon
The treatments were five doses of P2O5 (0, 50, 100, 150 and 200 kg ha-1), using the source triple superphosphate applied in the planting furrow, and three doses of P2O5 (0, 100 and 200 kg ha-1), using the source Bayóvar reactive phosphate rock applied in the total area
Summary
The expansion of sugarcane fields in Brazil has been intensified because of the increasing demand for biofuels, especially from ethanol and sugar production, its main product (Ferreira Júnior et al, 2012; Moura Filho et al, 2014). Brazil is the global leader in sugarcane production, with about 634.8 million tons per season. The state of Alagoas is responsible for 22.4 million tons, occupying the sixth position among the producing states. The low yield of sugarcane fields in the state of Alagoas is mostly due to the low fertility of its soils, which reduces plant growth and development (Melo Filho et al, 2007). In this context, the use of soil management practices can contribute to increase the fertility of these soils, increasing agricultural yield
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