Estudo comparativo entre metodo pratico de campo e metodos laboratoriais na determinacao de amido em mandioca
JUSTE JUNIOR, E.S.G.
Estudo comparativo entre metodo pratico de campo e metodos laboratoriais na determinacao de amido em mandioca - p. 142-147
Optimum harvest time was determined in a completely randomized exptl. design with 5 replicates and 3 treatments based on starch content of studied cv. and sugar and starch contents of the peel and pulp of cassava roots. Treatments were harvest times (11, 14, 17, and 20 mo. after planting), cv. (Mantiqueira, Branca de Santa Catarina, and Riqueza), and methods of determining sugar and starch contents (physical with the hydrostatic balance and chemical by hydrolisis and titration according to Fehling, and colorimetry). Differences in the methods of determining starch content were not significant, variations depending on harvest time and cv. Starch contents of the peel of all cv. were lower than those of the pulp. Considering that the min. level of starch required by alcohol industries is 30 percent, the following harvest times are recommended for the different cv.: Branca de Santa Catarina, 14-20 mo. (peeled roots) and 11-20 mo. (pulp); Riqueza, 17-20 mo. (peeled roots) and 14-20 mo. (pulp); and Mantiqueira, 14-20 mo. (peeled roots or pulp). When the total sugar content was added to starch content, Branca de Santa Catarina and Riqueza had hexose contentshigher than 30 percent between 11-20 mo. This favors their period of use. (CIAT)
Manihot esculenta
Analysis
Brazil
COMPOSITION
Cultivars
FIELD EXPERIMENTS
LABORATORY EXPERIMENTS
South America
STARCH CONTENT
Timing
America
Carbohydrate content
Research
Manihot esculenta
ANALISIS
Brasil
COMPOSICION
Cultivares
EXPERIMENTOS DE CAMPO
EXPERIMENTOS DE LABORATORIO
AMERICA DEL SUR
CONTENIDO DE ALMIDON
Registro del tiempo
Capítulos de informes Chapters in reports Yuca Cassava Book chapters
16697
Estudo comparativo entre metodo pratico de campo e metodos laboratoriais na determinacao de amido em mandioca - p. 142-147
Optimum harvest time was determined in a completely randomized exptl. design with 5 replicates and 3 treatments based on starch content of studied cv. and sugar and starch contents of the peel and pulp of cassava roots. Treatments were harvest times (11, 14, 17, and 20 mo. after planting), cv. (Mantiqueira, Branca de Santa Catarina, and Riqueza), and methods of determining sugar and starch contents (physical with the hydrostatic balance and chemical by hydrolisis and titration according to Fehling, and colorimetry). Differences in the methods of determining starch content were not significant, variations depending on harvest time and cv. Starch contents of the peel of all cv. were lower than those of the pulp. Considering that the min. level of starch required by alcohol industries is 30 percent, the following harvest times are recommended for the different cv.: Branca de Santa Catarina, 14-20 mo. (peeled roots) and 11-20 mo. (pulp); Riqueza, 17-20 mo. (peeled roots) and 14-20 mo. (pulp); and Mantiqueira, 14-20 mo. (peeled roots or pulp). When the total sugar content was added to starch content, Branca de Santa Catarina and Riqueza had hexose contentshigher than 30 percent between 11-20 mo. This favors their period of use. (CIAT)
Manihot esculenta
Analysis
Brazil
COMPOSITION
Cultivars
FIELD EXPERIMENTS
LABORATORY EXPERIMENTS
South America
STARCH CONTENT
Timing
America
Carbohydrate content
Research
Manihot esculenta
ANALISIS
Brasil
COMPOSICION
Cultivares
EXPERIMENTOS DE CAMPO
EXPERIMENTOS DE LABORATORIO
AMERICA DEL SUR
CONTENIDO DE ALMIDON
Registro del tiempo
Capítulos de informes Chapters in reports Yuca Cassava Book chapters
16697