Phosphorus use efficiency of sugarcane varieties

• Grant number: 11/18446-0
• Support Opportunities: Regular Research Grants
• Start date: January 01, 2012
• End date: December 31, 2013
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Fernando César Bachiega Zambrosi
• Grantee: Fernando César Bachiega Zambrosi
• Host Institution: Instituto Agronômico (IAC). Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil

Abstract

The research with regard to phosphorus (P) management in the sugarcane is a very important issue due to widespread occurrence of low-P soils. We are proposing a study with the objectives of: i) characterize the variability in the efficiency of P uptake and utilization of sugarcane varieties; ii) determine features related to distinct P use efficiency among sugarcane varieties; iii) evaluate the responses of different varieties to low-P availability in the soil and iv) effect of P supply and variety on the shoot regrowth. The varieties IAC87-3396, IACSP94-2094, IAC91-1099, RB867515, IACSP94-2101 and IACSP95-5000 will be subjected to P deficient (P rate = 40 mg kg-1 of soil) and P sufficient (P rate = 400 mg kg-1 of soil) treatments. Plant growth, total P uptake, P fractioning and acid phosphatase activity in the leaves will be determined. Before harvesting the experiment, leaf gas exchange and photochemical activity will be evaluated in mature leaves. Total dry weight and P accumulated by the plants will be used to obtain P uptake, utilization and use efficiency. We expect that our results can contribute to define sugarcane varieties more efficient in P use and to characterize the responses of sugarcane related to the adaptation to low-P availability. Therefore, our research purpose might lead to improved understanding of sugarcane P nutrition and P management in low-P soils. (AU)

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)

BACHIEGA ZAMBROSI, FERNANDO C.; RIBEIRO, RAFAEL VASCONCELOS; RIBEIRO MARCHIORI, PAULO E.; CANTARELLA, HEITOR; ANDRADE LANDELL, MARCOS G.. Sugarcane performance under phosphorus deficiency: physiological responses and genotypic variation. PLANT AND SOIL, v. 386, n. 1-2, p. 273-283, JAN 2015. (11/18446-0)

BACHIEGA ZAMBROSI, FERNANDO C.; RIBEIRO, RAFAEL VASCONCELOS; MACHADO, EDUARDO CARUSO; GARCIA, JULIO CESAR. PHOSPHORUS DEFICIENCY IMPAIRS SHOOT REGROWTH OF SUGARCANE VARIETIES. EXPERIMENTAL AGRICULTURE, v. 53, n. 1, p. 1-11, JAN 2017. (11/18446-0)