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Productivity and technological quality of sugarcane under fertilization of nitrogen and molybdenum

2018; Springer Science+Business Media; Issue: ahead Linguagem: Inglês

10.4067/s0718-95162018005002901

0718-9516

Renato Lemos dos Santos, Fernando José Freire, Emídio Cantídio Almeida de Oliveira, Djalma Euzébio Simões Neto, Maércio Rodrigo Farias Amaral de Medeiros, Patrícia da Costa Bezerra, Maria José Alves de Moura, José de Arruda Barbosa, Nayara Rose da Conceição Lopes, Nayara de Lima Santos,

Biofuel production and bioconversion

The increase of N fertilization in sugarcane can negatively influence the technological quality of the crop for sugar and alcohol production. The use of Mo in fertilization combined with N can reduce this effect and increase agricultural and sugar yield. The objective of this study was to evaluate the levels of Mo in soil, roots and leaves of sugarcane fertilized with N and Mo, to measure agricultural and sugar productivity and to evaluate quality of the technological attributes for production of sugar and alcohol. Two varieties were cultivated (RB867515 and RB92579) under field conditions, submitted to two doses of N (0 and 60 kg ha-1) and two doses of Mo (0 and 200 g ha-1) both applied to the soil. The source of N used was urea and the source of Mo was sodium molybdate. RB867515 was influenced by Mo and agricultural and sugar productivity increased by 21%. N fertilization did not increase agricultural productivity but reduced the technological quality of sugarcane, and Mo did not change this reduction. It is suggested that N fertilization should be reduced in first crop cycle and Mo fertilization should be stimulated.