Journal of Food, Agriculture and Environment

Effects of hydrogen peroxide and sodium hypochlorite on the chemical composition and in vitro digestibility of soybean straw

Author(s):

Mohammad Khorvash ^1*, Shahryar Kargar ¹ , Taher Yalchi ², Gholam Reza Ghorbani ¹

Recieved Date: 2010-06-21, Accepted Date: 2010-10-29

Abstract:

A study was conducted to investigate changes in chemical composition and in vitro digestibility of soybean straw (SBS) treated with hydrogen peroxide (H₂O₂) or sodium hypochlorite (NaOCl). The H₂O₂ and NaOCl were applied to 500 g dry matter (DM) of chopped SBS at rates of 0, 20, 40, 60 and 80 g kg^-1 DM with water (500 g kg^-1 DM) and sealed for 30 days. In vitro digestibilities were determined after incubating samples in buffered rumen fluid for 48 h using ANKOM Daisy II Incubators. For both chemical negative linear effects on the neutral detergent fiber (NDF) and acid detergent fiber (ADF) content occurred. Effect of H₂O₂ on declining NDF, ADF and acid detergent lignin (ADL) of treated SBS was greater than the effect of NaOCl. The cell wall content was least for high rate (80 g kg^-1) H₂O₂ -treated SBS (P<0.05). Either H₂O₂ or NaOCl linearly decreased the in vitro digestibility of DM (IVDMD), NDF (IVNDFD) and ADF (IVADFD). The IVDMD, IVNDFD and IVADFD of H₂O₂-treated SBS were lowest and highest for greatest and least (80 and 20 g kg^-1) rates of treatment (P<0.05), respectively. There were no significant differences (P>0.05) in IVDMD and IVNDFD of NaOCl-treated SBS. The IVADFD was highest (P<0.05) for 60 g kg^-1 rate of NaOCl-treated SBS. The SBS has very low quality as an agricultural by-product for feeding ruminants. Either H₂O₂ or NaOCl had little effect on the nutritive value of SBS. The oxidants decreased cell wall composition of treated SBS but did not effectively improve in vitro digestibility, however, effects of H₂O₂ were better than those of NaOCl.

Keywords:

Soybean straw, hydrogen peroxide, sodium hypochlorite, in vitro digestibility

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Agriculture
Pages: 848-851

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