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- Title
Weed management and fertilization limit the potential of cassava productivity in subtropical environment.
- Authors
de Souza Cardoso, Paula; Ferigolo Alves, Alexandre; Friedrich, Eduardo Daniel; Tironi, Luana Fernandes; da Rosa Ulguim, André; Streck, Nereu Augusto; Zanon, Alencar Junior
- Abstract
The objectives of this study were to evaluate the response to fertilization and different weed control periods in the accumulation of dry matter of cassava leaves, stems, roots, and fresh mass roots yield. Two experiments were carried out on commercial fields in Ibarama, and Santa Maria municipalities located at the Rio Grande do Sul State, South Brazil, during the 2018/2019 growing season. Five treatments, varying chemical fertilizer applications and herbicides were used to represent management practices commonly used by farmers in Southern Brazil. The Simanihot process-based model simulated cassava growth, development, and productivity under potential conditions. Results show that the recommended dose of fertilizers and liming combined with pre-emergent herbicide and three mechanical weed clear management showed a 72% increase in root productivity compared to the management used by the average yield of smallholder farmers. Therefore, it is possible to reach 80% of the potential productivity by keeping the cassava crop free from weed interference and applying fertilizers. The presence of weeds during the first 100 days after planting reduced about 50% of the plant dry matter production in Ibarama and Santa Maria. Interestingly, it also affects 79.2% of fresh roots productivity in Ibarama.
- Subjects
SANTA Maria (Calif.); BRAZIL; RIO Grande do Sul (Brazil : State); CASSAVA; WEED control; HERBICIDE application; FERTILIZER application; FERTILIZERS; FARMERS
- Publication
Revista de Ciencias Agroveterinarias, 2022, Vol 21, Issue 3, p274
- ISSN
1676-9732
- Publication type
Article
- DOI
10.5965/223811712132022274