English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Olive mill waste is low-quality feed and rarely used in ruminantnutrition because of its high lignocellulose content, the existence ofanti-nutritional factors such as total polyphenol and condensed tannin, andlow protein contents. This in vitro research was conducted to valorize this waste (crude olive cake, extracted olive cake, and olive leaves) using an exogenousfibrolytic enzyme produced from Trichoderma longibrachiatum in ruminal nutrition. The enzymaticactivity of this additive was 1161 units ofendoglucanase per millilitre, 113 units ofexoglucanase per millilitre, and 2267 units of xylanases per millilitre. This treatment was appliedby spraying substrates with four doses: 0 (control), 1 (low), 2 (medium),and 4µL g−1 µL g−1 (high) of dry matter olive mill waste in an air-conditionedroom at 26 ∘C for 12 h before in vitro incubation. For the crude olive cake, this additive at high doses increased degradationof 14 % of cellulose and 8 % of hemicellulose compared with the control at12 h before the in vitro incubation. Consequently, it increased dry mattersolubility and reduced sugars at this period compared to the control. Uponruminal incubation, the high dose of exogenous fibrolytic enzyme increasedthe gas production from the immediately soluble fraction and insoluble fraction,the rate of gas production for the insoluble fraction, the dry matterdegradability by 26 %, the organic matter degradability by 24 %, themetabolizable energy value by 28 %, and the microbial crude proteinproduction by 24 % compared with the control. For olive leaves, an exogenousfibrolytic enzyme at medium dosage can also hydrolyse the hemicellulosecompound, release fewer sugars, and increase dry matter solubilitycompared with the control at 12 h before the in vitro incubation. Upon in vitro incubation, the medium dose increased the gas production fromimmediately soluble and insoluble fractions, the rate of gas production forthe insoluble fraction, the dry matter degradability by 13 %, the organicmatter degradability by 11 %, the metabolizable energy value by 12 %,and the microbial crude protein production by 12 % compared with thecontrol. However, the highest dose altered the gas production from insolublefractions and decreased microbial crude protein production by 6 % comparedwith the control. Under the same conditions, an exogenous fibrolyticenzyme applied to extracted olive cake did not produce any effect in the chemicalcomposition and nutritional value. These results showed clearly thateffectiveness of exogenous fibrolytic enzyme varied with incubated waste.Increasing the nutritional value of crude olive cake and olive leaves using anexogenous fibrolytic enzyme can encourage breeders to use this waste asfeed at a low cost in animal nutrition. This valorization of waste is a goodsolution to reduce pollution of soils and groundwater caused by throwing outthis polluted waste into the environment.

archives animal breeding/archiv für tierzucht

In vitro study on the effects of exogenic fibrolytic enzymes produced from &amp;lt;i&amp;gt;Trichoderma longibrachiatum&amp;lt;/i&amp;gt; on ruminal degradation of olive mill waste