Lookup NU author(s): Dr Abdul Chaudhry
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This split unit study involved two sheep, seven incubation times and four test straws to compare with untreated straw the effect, kg-1 straw dry matter (DM), of CaO (160 g CaO plus 21 of water), NaOH (80 g NaOH in 31 of water) and alkaline hydrogen peroxide (NaOH plus 132 g H2O2 in 31 of water, AHP) treatments on composition and rumen degradation in sacco of wheat straw in sheep. After 14 days of storage, each straw was mixed with molasses, dried, ground, weighed into nylon bags and incubated ruminally for various hours in sheep fed daily 1 kg dried grass cubes. After removal, the residues within bags were washed together with unincubated samples (0 h) of straws, dried and analysed for DM, organic matter (OM) and neutral-detergent fibre (NDF) to estimate nutrient disappearance from straws. The data on nutrient disappearance were fitted exponentially to estimate quick- (a), slow (b) and predicted (P0.025) degradable fractions and degradation rate (c) for b. NDF and hemicellulose were reduced in treated compared with untreated straw (p < 0.001). Disappearance of nutrients from treated straws was significantly greater than that from untreated straw at almost all incubations (p < 0.001). The a, b, c and P0.025 estimates were significantly increased by all treatments (p < 0.001). AHP treatment increased straw degradation more than NaOH and CaO treatments. Although, CaO improved rumen degradation less than NaOH, its use to increase straw digestion even moderately may be more desirable because it is readily available, cheap and less dangerous for the users and the environment. (C) 2000 Published by Elsevier Science B.V.
Author(s): Chaudhry AS
Publication type: Article
Publication status: Published
Journal: Animal Feed Science and Technology
ISSN (print): 0377-8401
ISSN (electronic): 1873-2216
Publisher: Elsevier B.V.
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