Dry matter in cassava roots determined by the hydrostatic balance and oven-dry methods

• Autor(a) principal: Pola, Augusto Carlos
• Data de Publicação: 2020
• Outros Autores: Moreto, Alexsander Luis, Nunes, Eduardo da Costa
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Agropecuária Catarinense (Online)
• Texto Completo: https://publicacoes.epagri.sc.gov.br/rac/article/view/533
• topic: Manihot esculenta; matéria seca; métodos de determinação

The objective of this study was to evaluate two different methodologies for the determination of dry matter in cassava roots. For this purpose, in the first trial, roots of four cultivars were used, harvested 10 to 22 months after planting. In a second trial, roots of the cultivar Sambaqui were harvested monthly from two crops with different types of soil. Data of the different cultivars showed that the drying method presented an average dry matter content 5.3% lower than that of the hydrostatic balance in the first vegetative cycle (dormancy stage). In the second vegetative cycle, the drying method presented average levels of 5.7% and 6.7% higher than the hydrostatic balance for the cultivars Sambaqui and Luna, respectively. The cultivars Mandim Branca and Olho Junto showed no significant differences (p> 0.05) between the methods in the second vegetative cycle. In the second test, with the cultivar Sambaqui, the drying method also presented, in the second vegetativecycle, an average dry matter content 6.0% higher than that obtained with the gravimetric method. Differences in dry matter content between methods varied according to the genotype, harvest time and cultivar.