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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Simulating sugarcane yield response to ETc replacements and green cane trash blanket maintenance in Brazil

Full text
Author(s):
Ivo Z. Gonçalves [1] ; Leandro G. da Costa [2] ; Fábio R. Marin [3]
Total Authors: 3
Affiliation:
[1] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
[2] Pontifícia Universidade Católica de Campinas - Brasil
[3] Universidade de São Paulo. Escola Superior de Agricultura “Luiz de Queiroz” - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Revista Brasileira de Engenharia Agrícola e Ambiental; v. 26, n. 8, p. 586-593, 2022-07-25.
Abstract

ABSTRACT Determining the proper crop water requirement associated with the optimum amount of green cane trash blanket (GCTB) on the soil is one of the most discussed issues for sugarcane growers. In this context, this research aimed to evaluate the effects of different amounts of GCTB and ETc replacement scenarios on sugarcane yields across key producing regions in Brazil using the agricultural production systems simulator (APSIM). The sugarcane APSIM (APSIM-Sugar) was parameterized and validated for sugarcane in Brazil, compared to both 100% GCTB cover and bare soil, both fully irrigated. After validation through field data, the APSIM-Sugar model was used to simulate 25 different scenarios with varying GCTB amounts and irrigation demands in 12 regions of Brazil for a 30-year period to estimate stalk yield. Overall, modeled and field data agreed very well regarding soil moisture and biometric and physiological variables, achieving strong modeling efficiency. For most producing regions of Brazil, interaction between the factors did not increase stalk yield significantly, and up to 50% of ETc replacement resulted in the highest increases in stalk yield, with the greatest improvement between 0-25%, producing an average increase of 30 Mg ha-1 per year. The recommended amount of GCTB is at least 5.50 Mg ha-1, taking into account soil health and the need for biofuel generation. (AU)

FAPESP's process: 21/00720-0 - Advancing databases and modeling techniques for yield-gap analysis in Brazilian agricultural systems
Grantee:Fabio Ricardo Marin
Support Opportunities: Regular Research Grants
FAPESP's process: 13/16511-4 - Influence of crop residues on water consumption, growth and yield of irrigated sugarcane
Grantee:Leandro Garcia da Costa
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/12406-4 - Brazilian sugarcane yield-gap: current status and future projection based on climate, soil and water management changes
Grantee:Fabio Ricardo Marin
Support Opportunities: Research Program on Global Climate Change - Regular Grants
FAPESP's process: 14/19410-7 - Trash management effects on sugarcane growth, yield and water use for Brazilian and Australian farming systems
Grantee:Leandro Garcia da Costa
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 20/08365-1 - Use of orbital data for a new approach to improve irrigation management in center pivot in Brazil
Grantee:Ivo Zution Gonçalves
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/20925-0 - Brazilian yield-gap atlas: assessing the potential for sustainable intensification of Brazilian agriculture
Grantee:Fabio Ricardo Marin
Support Opportunities: Regular Research Grants