Two field experiments were carried out at Mallawi Agric. Res.
Station, El- Minia, Egypt during the two seasons (1993 and 1994 seasons)
to study the effect of four levels of nitrogen (0, 40, 80 and 120 kg N/fed.),
three levels of phosphorus (0, 16 and 32 kg P205/ fed. ) on technological
properties of juice and syrup of sorne sweet sorghum cultivars (Hybrid
405 and Honey cultivais). The treatments were arranged in split- split plot
experimental design in four replications. The following, are the most
important results.
The application of 120 kg N/fed, gave the maximum syrup yield,
purity percent in juice, T.S.S % and sucrose percent in juice at different
maturity stage, juice extraction and reducing sugars content at dough stage.
The mean values ofjuice extraction percent, sucrose %, syrup yield
at different maturity stages, purity percent at milk and ripe stages were
increased by increasing the levels of phosphorus . .
I-loney cultivar gave the highest juice extraction percent, T.S.S
percent, sucrose percent in juice, reducing sugar content in juice and syrup
yield. While Hybrid 405 cultivar significantly surpassed Honey cultivar
in purity percent in juice at milk and dough stages. In general, juice
extraction and reducing sugars concentration reached its maximum at milk
stage, whereas total soluble solids, sucrose percent in juice and syrup yieldl
fed, increased gradually p to ripe stage.