Utilisation of Roselle (Hibiscus Sabdariffa, L) By-Products as Roughage Feed for Sheep
Roselle (Hibiscus sabdariffa, L.) is cultivated for the calyces, which are used for making roselle juice, a drink known to be high in vitamin C. The leaves are also used as a pot herb and some varieties are grown for their fibre. Roselle pods and seeds are by-products obtained after the calyces a...
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| 格式: | Thesis |
| 语言: | English English |
| 出版: |
2000
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| 主题: | |
| 在线阅读: | http://psasir.upm.edu.my/id/eprint/10519/1/FP_2000_12.pdf |
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| 总结: | Roselle (Hibiscus sabdariffa, L.) is cultivated for the calyces, which are
used for making roselle juice, a drink known to be high in vitamin C. The leaves
are also used as a pot herb and some varieties are grown for their fibre. Roselle
pods and seeds are by-products obtained after the calyces are removed from the
fruits. The objective of the study was utilised the roselle by-products for small
ruminant especially as sheep feed. Roselle by-products were obtained from
farmers in Terengganu. In the first part of the study, chemical analysis was
performed on the whole pods, seeds and empty pods. The roselle by-products
were found to be high in protein, fat and fibre. The nutrient content of roselle byproducts
was higher than other agricultural by-products, such as sago waste,
straw, cocoa pods, stalks and sugar cane bagasse.
In the second part of the study, in situ degradability of roselle empty pods
and seeds was investigated. The result indicated that degradation of dry matter
and organic matter of roselle seeds was higher than roselle empty pods, significantly different (P< 0.01) in 48 hours, percentage of DM and OM of roselle
seeds and empty pods were 36.38%, 28.36% and 23.01%, 17.66%, respectively;
and also in 72 hours by 39.87%, 31 % and 26.30%, 20.85%, respectively. Even
though the seeds were more degradable than the empty pods, both were still low
in degradability « 50%). Degradability of roselle by-products can be improved
by using chemical treatment, physical treatment or microbial treatment.
In the third part of the study, roselle by-products were treated with soaked
alkali such as NaOH and Ca(OHh at various levels (2%, 4% and 6%), and the
nutrient contents analysed. It was found that the chemical composition of roselle
treated with NaOH and Ca(OH)2 decreased, except for ash. |
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