Response of sugarcane in a Red Ultisol to phosphorus rates, phosphorus sources, and filter cake

Nenhuma Miniatura disponível

Data

2015-01-01

Autores

Caione, Gustavo
De Mello Prado, Renato [UNESP]
Campos, Cid Naudi Silva [UNESP]
Rosatto Moda, Leandro [UNESP]
De Lima Vasconcelos, Ricardo [UNESP]
Pizauro Júnior, João Martins [UNESP]

Título da Revista

ISSN da Revista

Título de Volume

Editor

Resumo

We evaluated the effect of phosphorus application rates from various sources and in the presence or absence of filter cake on soil phosphorus, plant phosphorus, changes in acid phosphatase activity, and sugarcane productivity grown in Eutrophic Red Ultisol. Three P sources were used (triple superphosphate, Araxa rock phosphate, and Bayovar rock phosphate) and four application rates (0, 90, 180, and 360 kg ha<sup>-1</sup> of P<inf>2</inf>O<inf>5</inf>) in the presence or absence of filter cake (7.5 t ha<sup>-1</sup>, dry basis). The soil P, the accumulated plant P, the leaf acid phosphatase activity and straw, the stalk productivity, the concentration of soluble solids in the juice (Brix), the juice sucrose content (Pol), and the purity were the parameters evaluated. We found that P applications increased levels of soil, leaf, and juice phosphorus and led to higher phosphorus accumulation and greater stalk and straw productivity. These levels were highest in the presence of filter cake. Acid phosphatase activity decreased with increasing plant phosphorus concentration. Phosphate fertilization did not show effect on sugarcane technological quality. We concluded that P application, regardless of source, improved phosphorus nutrition and increased productivity in sugarcane and, when associated with filter cake, reduced the need for mineral fertilizer.

Descrição

Palavras-chave

Como citar

Scientific World Journal, v. 2015.