TY  - GEN
AU  - JUSTE JUNIOR, E.S.G.
AU  - CARVALHO, V.D. DE
AU  - CORREA, H.
AU  - CLEMENTE, P.R.
TI  - Estudo comparativo entre metodo pratico de campo e metodos laboratoriais na determinacao de amido em mandioca
AV  - 16697 
KW  - Manihot esculenta
KW  - Analysis
KW  - Brazil
KW  - COMPOSITION
KW  - Cultivars
KW  - FIELD EXPERIMENTS
KW  - LABORATORY EXPERIMENTS
KW  - South America
KW  - STARCH CONTENT
KW  - Timing
KW  - America
KW  - Carbohydrate content
KW  - Research
KW  - ANALISIS
KW  - Brasil
KW  - COMPOSICION
KW  - Cultivares
KW  - EXPERIMENTOS DE CAMPO
KW  - EXPERIMENTOS DE LABORATORIO
KW  - AMERICA DEL SUR
KW  - CONTENIDO DE ALMIDON
KW  - Registro del tiempo
KW  - Capítulos de informes
KW  - Chapters in reports
KW  - Yuca
KW  - Cassava
KW  - Book chapters
N2  - 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)
ER  -