Assessing management factors limiting yield and starch content of cassava in the western Brazilian Cerrado.
2025
ZEBALHO, C. S. | PILECCO, I. B. | STRECK, N. A. | CARDOSO, P. DE S. | FREITAS, C. P. DE O. DE | VIEIRA, E. A. | SOARES, M. F. | TAGLIAPIETRA, B. L. | FERIGOLO, A. A. | SWAROWSKY, A. | FOLLMANN, D. N. | SOUZA, J. V. S. DE | ZANON, A. J. | CLEITON SIMÃO ZEBALHO, UNIVERSIDADE FEDERAL DE SANTA MARIA; ISABELA BULEGON PILECCO, UNIVERSIDADE FEDERAL DE SANTA MARIA; NEREU AUGUSTO STRECK; PAULA DE SOUZA CARDOSO, UNIVERSIDADE FEDERAL DE SANTA MARIA; CHARLES PATRICK DE OLIVEIRA DE FREITAS, UNIVERSIDADE FEDERAL DE SANTA MARIA; EDUARDO ALANO VIEIRA, CPAC; MAURICIO FORNALSKI SOARES, UNIVERSIDADE FEDERAL DE SANTA MARIA; BRUNA LAGO TAGLIAPIETRA, UNIVERSIDADE ESTADUAL DE CAMPINAS; ALEXANDRE ALVES FERIGOLO; ALEXANDRE SWAROWSKY, UNIVERSIDADE FEDERAL DE SANTA MARIA; DIEGO NICOLAU FOLLMANN, UNIVERSIDADE FEDERAL DE SANTA MARIA; JOÃO VITOR SANTOS DE SOUZA, UNIVERSIDADE FEDERAL DE SANTA MARIA; ALENCAR JUNIOR ZANON, UNIVERSIDADE FEDERAL DE SANTA MARIA.
Cassava (Manihot esculenta Crantz) was declared the “crop of the 21st century” by the Food and Agriculture Organization of the United Nations due to its high starch content and low input requirements. The management factors that govern yields and starch content in cassava in Brazil are still unclear. The aim of this study was to identify the main factors that limit the yield and starch content of cassava fields in Brazilian Cerrado. The data were collected as part of a survey covering 300 cassava fields in two growing seasons (2020–2021 and 2021–2022). Throughout the development cycle, management practices, yield, and percentage starch content in the roots were described. The database was divided into high and low yield tertiles. Mean comparison tests, regression tree analyses, and boundary functions were applied. The importance of genetics, environment, and associated crop constraints on cassava production (yields and starch content) was assessed. The yield gap in cassava was 44.6 Mg ha−1. The most important factors leading to yield and tarch losses were variety, planting date, and potassium fertilization. By adapting optimal practices, it is possible to produce an additional 1.5 million tons of cassava on the current cultivation area in the western Brazilian Cerrado, which corresponds to 8.3% of total production in Brazil and could increase the production of cassava starch by more than 400,000 Mg.
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Эту запись предоставил Empresa Brasileira de Pesquisa Agropecuária