Lo stoccaggio del sorgo zuccherino. Influenza della lunghezza dello stelo sulle perdite di zucchero
Assirelli, A.; Amaducci, S.; Suardi, A.; Del Giudice, A.; Scarfone, A.; Santangelo, E.; Pari, L.
|Kind of publication:|
Compagnia delle Foreste
|Abstract in Italian:|
La lunghezza del periodo di stoccaggio e la dimensione del prodotto stoccato costituiscono due
fattori che influenzano le perdite in zuccheri nel sorgo zuccherino. La ricerca ha investigato la
variazione in zuccheri che ha luogo in porzioni di culmo di diversa dimensione nel corso di uno
stoccaggio a lungo termine.
|Abstract in English:|
The sugar content of Sweet sorghum (Sorghum bicolor (L.)
Moench) in the plant stems varies from 12 to 25% according
to the plant type, but sugars are very easy to be lost,
especially during harvesting and storage. The former are due
to lack of machineries capable to harvest the entire plant,
while storage losses are due to fermentation processes.
Therefore, the identification of suitable harvesting and storage
systems is fundamental to optimize the energetic yield
of the crop.
The losses of fermentable sugars follow different patterns
and particular attention has been paid to the size of the
material . The main objective of the present work is to monitor
the time course of dry matter and sugar content in sweet
sorghum over a storage period of 75 days. The analysis has
been carried out dividing the stems in portions of different
length (whole stem, 1/2, 1/4, 1/8, and 1/16 of the whole
stalk length) to compare the rate of sugar losses.
The sugar distribution along the stem demonstrated that
sugars content tends to decrease going from the base to the
top, a helpful information for the choice of cutting height. The
sugar loss during storage is highly influenced by the size of
the stem portion obtained at harvest. The lower rate of sugar
loss was measured on whole stems. The long-term storage
appears achievable but its length is strictly related to the size
of stalk portion.