Harvesting Systems, Soil Cultivation, and Nitrogen Rate Associated with Sugarcane Yield

Autor(es)

Quassi de Castro, Sergio Gustavo ^[1] ; Graziano Magalhaes, Paulo Sergio ^[2] ; Junqueira Franco, Henrique Coutinho ^[1] ; Mutton, Miguel Angelo ^[3]

Afiliação do(s) autor(es)

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Bioethanol Sci & Technol Lab CTBE, BR-13083970 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, FEAGRI, Sch Agr, Cidade Univ Zeferino Vaz, BR-13083970 Campinas, SP - Brazil

^[3] Univ Sao Paulo State, UNESP, FCAV, Via Acesso Prof Paulo Donatto Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BioEnergy Research; v. 11, n. 3, p. 583-591, SEP 2018.
• Citações Web of Science: 1

Resumo

The adoption of mechanical harvesting of green cane gives rise to concerns as to whether systems developed under burnt cane harvesting are applicable to a green cane harvesting system. In particular, tillage, which is an integral part of the burnt cane system, may no longer be necessary, and the nitrogen fertilizer rates required may need to be replaced due to the large amounts of organic matter being returned to the soil after green cane harvesting. Mechanical harvesting is relatively new in Brazil and little is known about its effect on other sugarcane production strategies. This work aimed to evaluate sugarcane performance under not only different harvesting and cultivation systems, but also different nitrogen fertilizer rates over a 3-year period. The experimental design was a split plot with harvesting systems (burnt vs. green) as main plots, cultivation (interrow vs. no cultivation) as sub plots, and nitrogen rates as sub-sub plots. The harvesting systems produced similar sugarcane yields throughout the experimental period, which demonstrates that the harvest systems do not influence sugarcane yield. Mechanical tillage practices in interrow after harvesting had no impact on stalk yield or sugar quality, indicating no necessity for this operation in the following crop. Ratoon nitrogen fertilization promoted an increase of stalk and sugar yield, with highest yields obtained at the rate of 130 kg ha(-1) N. However, there was no interaction between harvesting system and nitrogen rate. (AU)

• Processo FAPESP: 13/01417-2 - Manejo da adubação nitrogenada em cana-de-açúcar: busca de alternativas para o aumento de sua eficiência
• Beneficiário: Sérgio Gustavo Quassi de Castro
• Modalidade de apoio: Bolsas no Brasil - Doutorado