Study of chemical composition and nutritive value of treated sesame straw by using in situ and in vitro methods

Shoryabi, Z. (2013) Study of chemical composition and nutritive value of treated sesame straw by using in situ and in vitro methods. Masters thesis, University of Zabol.

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This study was carried out to evaluate changes in chemical composition and nutritional value of sesame straw silage in response in urea, molasses and enzyme. For this aim sesame straw were harvested and chopped with cutting length about 2 to 4cm. the chopped straw then were mixed with the urea(%5), molasses(%10) and enzyme (2/4 g/kg DM) and ensiled in 5 Kg plastic baskets. The silages were opened after 45 day and chemical compositions including dry matter (DM), organic matter (OM), ash, ether extract (EE), crude protein (CP) and cell wall without hemicelluloses fractions were measured according to the standard procedure. Dry matter digestibility, metabolizable energy content and dry matter degradability were also determined by gas production (in vitro) and nylon bags (in situ) methods. Results showed that the addition of urea significantly increased in pH, DM, CP, OM content and decreased EE, ADF and NDF content respectively. Addition of molasses caused a significant increase in DM content and reduction of pH, EE, ADF and NDF content (p< 0/05). Addition of enzyme caused a significant reduction ADF and NDF content (p<0/05). The in situ degradability showed an increase DM degradability (from 32/82 to 45/34) percent. Also, results from in vitro gas production method revealed that in all incubation times after adding urea amount of gas production decreased but with adding molasses it was increased and with adding enzyme expect in time 2 and 4 gas production value was increased. In conclusion, considering the changes in cell wall contents, hemicelluloses contents and degradability values in the present study, it can be suggested that the use of supplements urea and molasses can be used to make good sesame straw silage.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Sesame Straw, Gas production, Degradability
Subjects: S Agriculture > SB Plant culture
Depositing User: admin admin1 admin2
Date Deposited: 29 Nov 2016 06:26
Last Modified: 29 Nov 2016 06:26

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