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Comparative Study of the Nutritive Values of the Different Varieties of Rice Straw

M. M. Rahman
Senior Officer, Sonali Bank Limited, Bagha Branch, Rajshahi, Bangladesh.

M. R. Alam
Department of Animal Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

M. R. Amin
Department of Animal Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

N. G. Das
Bangladesh Livestock Research Institute, Savar, Dhaka-1341, Bangladesh.

Abstract/ Executive Summary:

This study was conducted to investigate the nutritional quality. The Dry matter (DM), Organic matter (OM), Crude protein (CP), Acid detergent fibre (ADF), Neutral detergent fibre (NDF), lignin, Ca and P contents of Pajam, Nijershail, Kablabadam, BR 11, BINA 5 and BRRI 29 varieties of rice straw varied from 92.21 to 93.05%, 81.21 to 86.24%, 3.49 to 5.10%, 41.38 to 46.32%, 72.16 to 77.57%, 4.3 to 6.97%, 0.10 to 0.245% and 0.046 to 0.146%, respectively. The OM content in Nijershail was significantly higher (P<0.01) than Kablabadam, BR 11, BRRI 29, Pajam and BINA 5, respectively. The variety BRRI 29 contained significantly higher (P<0.01) CP content (5.1%) than BINA 5, BR 11, Pajam, Nijershail and Kablabadam, respectively. Significantly (P<0.01) higher NDF content was found in BR 11 (77.57%) followed by Kablabadam, Nijershail, Pajam, BRRI 29 and BINA 5, respectively. Acid deter gut Fibre (ADF) content was significantly (P<0.05) higher in Nijershail (46.32%) than Kablabadam, BR 11, BINA 5, Pajam and BRRI 29, respectively. Significantly (P<0.01) higher lignin content was found in BRRI 29 (6.97%) compared to Kablabadam, BINA 5, Pajam, Nijershail and BR 11, respectively. The Ca content in Pajam and BR 11 was significantly (P<0.01) higher (0.245%) than Nijershail, BRRI 29, Kablabadam and BINA 5, respectively. BRRI 29 contained significantly (P<0.01) higher P content (0.146%) compared to BINA 5, Pajam, Nijershail, Kablabadam and BR 11, respectively. Organic Matter (OM) digestibility, and ME content in BRRI 29 was significantly (P<0.01) higher followed Nijershail, BINA 5, Pajam, Kablabadam and BR 11, respectively. Straw of BRRI 29 is expected to provide more nutrients, digestible organic nutrients and metabolizable energy to ruminants.

Keywords: Rice straw, Chemical composition, Energy content, Digestibility

Location: BAU, Mymensingh

Start Date: 00-12-2005

End Date: 00-05-2006

Program Area: Quality and Nutrition

Commodity: Straw

Objectives:

To determine the chemical composition and nutritive values of different varieties of rice straw.

Methodology:

The experiment was conducted in the Department of Animal science, Bangladesh Agricultural University, Mymensingh to study the nutrition value of different varities of rice straw. Different varieties of rice straw (Pajam, Nijershail, Kablabadam, BR 11, BINA 5 and BRRI 29) were collected from the village Darikathal of Trishal thana, Mymensingh. Straws were collected after harvesting of mature crops. Rice straws of Aman season were collected during the month of December, 2005 and that of Boro season were in May, 2006. the collected samples were chopped in to 3-4 cm size, dried in sun, ground in a grinding machine (CYCLOTC1 993, Sample Mill Tecator, Sweden) to 1.0 mm size and then kept in polyethylene bag for proximate analysis and in vitro digestibility. Analytical methods Proximate compositions of straw samples was estimated according to the methods of AOAC (2003). Neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin were estimated by the methods of Faichney and White (1983). Calcium (Ca) and Phosphorus (P) were determined by the method of Olsen and Sommers (1982). Digestibility and ME content of straws were determined according to in vitro gas production techniques described by Menke et al. (1979) and Menke and Steingass (1988) using following equations. OM digestibility (%) = 14.88 + 0.889 × Gv (ml) + 0.45 × CP (%). ME (MJ/kg DM) = 2.20 + 0.136 × Gv (ml) + 0.057 × CP (%). Statistical analysis Data were analyzed using Analysis of Variance (ANOVA) technique and the mean differences were tested by Duncan’s Multiple Range Test (DMRT) described by Gomez and Gomez (1984) with the help of a computer based statistical package program, MSTAT.

Source of Information: Bang. J. Anim. Sci. 2010, 39(1&2) : 75 – 82 ISSN 0003-3588

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It is revealed from this study that rice straw of BRRI 29 is better in CP, P, OM digestibility, and ME content compared to other varieties viz., Nijershail, BINA 5, Pajam, Kablabadam and BR 11, respectively. It may be concluded that rice straw of BRRI 29 would provide more digestible organic nutrients and metabolizable energy to ruminants. Further investigation is needed for in vivo assessment of these rice straws qualities in terms of protein and energy supply and utilization by ruminants for formulation of straw based balanced feeding system.

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