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Phosphorus use efficiency of phosphate sources and fertilization ways in sugarcane

Abstract

The cultivated area with sugarcane in Brazil is already around nine million hectares and is expanding, in order to supply the improving demand for ethanol and sugar. However, productivity is limited by several factors, including the low phosphorus (P) availability and the adsorption of this P by oxy-hydroxides of Fe and Al in the soil, especially in tropical conditions. According to the rising costs of fertilizers and concerns about reduction of finite reserves of phosphate rock, the use of P by crops in general must become more sustainable and efficient. The objective of this research is to evaluate the efficiency of P use by sugarcane fertilized with organic (filter cake) and inorganic (reactive phosphate and superphosphate) sources of P applied at planting, in order to develop strategies to decrease the adsorption of this nutrient in soil and increase the recovery of P from fertilizer by plants. Four experiments will be established in field conditions in São Paulo State, as well as three experiments in controlled conditions (greenhouse). Field experiments will be established in plant cane and conducted throughout the crop cycle, until the next replanting. The evaluations will include: i) production of stalks; ii) technological attributes; iii) P accumulation by the plant; iv) use efficiency of P v) fractionation of P in the soil. Under controlled conditions, the experiments aim to assess the soil-rhizosphere interaction in the availability and utilization of P from soil and fertilizer by plants. Thus, the main goal of the research is to develop management practices to maximize the efficiency of P use from the soil and fertilizer by sugarcane, improving the sustainability of phosphate fertilization. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ARRUDA, BRUNA; RODRIGUES, MARCOS; GUMIERE, THIAGO; RICHARDSON, ALAN E.; ANDREOTE, FERNANDO DINI; SOLTANGHEISI, AMIN; GATIBONI, LUCIANO COLPO; PAVINATO, PAULO SERGIO. The impact of sugarcane filter cake on the availability of P in the rhizosphere and associated microbial community structure. SOIL USE AND MANAGEMENT, v. 35, n. 2, p. 334-345, . (13/23575-9, 13/21604-1)
DOS SANTOS, VALDEVAN ROSENDO; SOLTANGHEISI, AMIN; JUNQUEIRA FRANCO, HENRIQUE COUTINHO; KOLLN, ORIEL; VITTI, ANDRE CESAR; DOS SANTOS DIAS, CARLOS TADEU; PAVINATO, PAULO SERGIO. Phosphate Sources and Their Placement Affecting Soil Phosphorus Pools in Sugarcane. AGRONOMY-BASEL, v. 8, n. 12, . (13/21604-1)

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