ASSESSMEHT OF JUICE QUALITY IH SWEET SORGHUM (Sorghun bicolo; (L.) Moench) VARIETIES.
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Date
1990
Authors
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Mahatma Phule Krishi Vidyapeeth, Rahuri.
Abstract
The present investigations were undertaken to assess th
juice quality in fifteen sweet sorghum varieties. The juic
was analysed for brix,sucrose, reducing sugar, ash, pH
acidity, starch and polyphenol content at the milk and
physiological maturity stages. The correlation co-efficient
of these parameters were studied.
The varietal differences were significant in respect of brix
sucrose, reducing sugar, ash, acidity, starch and polypheno
content at the milk and physiological maturity stages. Th
mean brix of all the sweet sorghum varieties progressivel
increased from 16.65 (milk stage) to 19.26 (physiologica
maturity stage). The Cv.SSV-7073, SSV-108, SSV-1333, SSV-8
and SSV-96 had significantly higher brix, than all othe
varieties at both the stages. The per cent sucrose in all th varieties progressively increased from 10.29 to 13.70
The Cv. SSV-7073, SSV-53, SSV-96, SSV-74 and SSV-108 ha
consistently higher sucrose content than remaining varietie
at both the stages. The per cent purity of juice increase
from 62.07 to 71.24. The Cv. SSV-53, SSV-6928, SSV-96, SSV-7
and SSV-119 had consistently higher purity at both the growt
stages. The per cent reducing sugars in all the varietie
decreased from 2.26 to 1.48. The Cv. SSV-1456, SSV-1333
SSV-12611, SSV-7073, SSV-4755 and SSV-6928 had low reducin
sugar content at both the growth stages. The as
content in all the varieties decreased from 1.06 t
0.926 per cent. The Cv. SSV-12611, SSV-9911, SSV-119, SSV-8
and SSV-7073 had lower ash content at both the stages. Th
pH value decreased from 5.01 to 4.96. However, some cultivar
had not shown any change in pH at both the stages. Th
per cent acidity in all the varieties progressively increase
from 0.249 to 0.300 . The Cv. SSV-7073, SSV-2525
SSV-4755, SSV-9911 and SSV-6928 had lower acidity tha
all other varieties at both the stages. The per cent stare
in juice of all the varieties increased from 1.5 t
2.66. The Cv. SSV-74, SSV-84, SSV-96, SSV-108 an
SSV-1333 had lower starch content at both the stages. Th
polyphenol content progressively increased from 1.3
to 1.5 per cent. The Cv. SSV-108, SSV-9901, SSV-4755
SSV-1333 and SSV-7073 had lower polyphenol content at bot
the stages. The highest CCS. per cent in stalk was observe in Cv. SSV-53 followed by Cv. SSV-96, SSV-7073, SSV-74 ai
SSV-119. The cultivars showed significant differences
respect of CCS. tons/ha as green stalk yield and CCS. pi
cent in stalk was different in each cultivars. The highe;
CCS. tons/ha was observed in Cv. SSV-96 followed by C^
SSV-53, SSV-74, SSV-84 and SSV-119.
The correlation study indicated that the relationship betwe<
sucrose to ash, acidity, starch and polyphenol were four
positive while it was negative for pH and reducing sugars
Therefore, while developing new cultivar more attention need
to be paid to the high sucrose content, brix, purity and lc
concentration of ash,aconitic acid, starch and polyphenols i
juice. From overall investigation, considering all qualit
parameters of juice, it was concluded that Cvs.SSV-74, SSV
53, SSV-108, SSV-1333 and SSV-7073 had superior juic
quality.
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