Effects of applying cellulase and starch on the fermentation
                    characteristics and microbial communities of Napier grass (Pennisetum
                        purpureum Schum.) silage

Zhao, Guo Qiang; Wu, Hao; Li, Li; He, Jiajun; Hu, Zhichao; Yang, Xiaojun; Xie, Xiaoli

doi:10.5187/jast.2021.e107

Cited by 13 publications

(13 citation statements)

References 48 publications

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“…Escherichia coli appeared in ensilage at 3 and 7 days and disappeared at 14, 30, and 60 days, possibly due to the decrease in lactic acid content during the ensilage process [ 30 ], which led to a decrease in environmental pH and inhibited the growth of Escherichia coli . Filamentous fungi gradually decreased with the extension of ensilage time and disappeared after 30 days of ensilage, but they were present in the CK_60 and C_30 treatment groups, which may be caused by the change in environmental components and acidity during the ensilage process [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Study on Dynamic Fermentation of Oat Silage Assisted by Exogenous Fibrolytic Enzymes

Liu,

Du,

Sun

et al. 2023

Plants

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Based on the low content of water-soluble carbohydrate (WSC) and lactic acid bacteria (LAB) attachment in oat raw materials, we assumed that the neutral detergent fiber (NDF) content of oat can be reduced by adding cellulase or xylanase. The concentration of metabolizable sugars will be increased, which will assist the oat’s bacterial community in fermentation and obtain a better quality of oat silage. After wilting the oat, it was treated as follows: (1) distributed water (CK); (2) silages inoculated with xylanase (X); and (3) silages inoculated with cellulase (C), ensiling for 3, 7, 14, 30, and 60 days. Cellulase and xylanase treatments both alter the fermentation and nutritional quality of ensiled oat, resulting in lower NDF, acid detergent fiber (ADF), cellulose, and hemicellulose contents, increased lactic acid and acetic acid contents, and a significant decrease in ensiling environment pH. The bacterial community undergoes significant changes with cellulase and xylanase treatments, with a significant increase in Lactobacillus abundance in the C_14, X_30, C_30, X_60, and C_60 treatment groups, while Weissella abundance gradually decreases with longer ensiling times. Two exogenous fibrolytic enzymes also alter the bacterial diversity of ensiled oat, with different bacterial species and abundances observed in different treatment groups. Ensiled oat treated with cellulase and xylanase experiences significant changes in its own bacterial community, particularly in the abundance of Lactobacillus. These changes result in improved fermentation and nutritional quality of oat, but the higher metabolism levels observed after 60 days of ensiling with cellulase treatment may lead to energy loss.

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Section: Discussionmentioning

confidence: 99%

Study on Dynamic Fermentation of Oat Silage Assisted by Exogenous Fibrolytic Enzymes

Liu,

Du,

Sun

et al. 2023

Plants

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“…The increase in WSC content after 60 d in silage can be explained by the hydrolysis of starch, being consistent with the decrease in starch in silage at the same period. Previous studies showed an increase of 3-4% WSC by adding starch to the silage [48,49]. The increase in WSC after conservation indicates the potential for starch hydrolysis to contribute to carbohydrate availability, suggesting avenues for enhancing silage quality through supplementation strategies.…”

Section: Fermentative Characteristics Of African Stargrass Silage And...mentioning

confidence: 92%

Nutritive and Fermentative Traits of African Stargrass (Cynodon nlemfuensis Vanderyst) Forage Preserved for Silage and Haylage

Picado-Pérez,

Lemus,

Rivera

et al. 2024

Fermentation

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Climate shifts have significantly affected livestock systems due to their environmental interdependence. Among the strategies adopted by livestock systems to fill the gaps in forage biomass, preserved forages are the most commonly used. This research assessed the nutritional profile of African Stargrass (Cynodon nlemfuensis Vanderyst) preserved as silage and haylage at different feed-out periods (45, 60, 90, and 120 days). We found greater dry matter (DM) content in haylage (29.7%), with no important variations in silage over time. Stargrass silage had crude protein (CP) levels greater (13.0%) than haylage (11.9%); the former was not affected by the duration of the preservation period. Silage had lower levels of neutral detergent fiber (NDF) and higher levels of in vitro dry matter digestibility (IVDMD). The net energy for lactation (NEL) was similar for the two types of preservations evaluated. A principal component analysis (PCA) revealed that most of the variance in the dataset (69.6%) was explained by two principal components. PC1 showed that the most relevant variables were ADF, α-NDF, dNDF30, d NDF48, and NDICP, while Ash, Ca, and insoluble CP were the most relevant variables in PC2. Unlike haylage, the nutritional value of silage remained constant (p > 0.05) up to 120 days of preservation. It is important to note that haylage should not be stored beyond 90 days, regardless of the type of preservation.

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“…There are various types of enzymes used as feed supplements in the livestock industry, which can be largely divided into a single enzyme (SE) and a multienzyme complex (MC) [ 14 , 15 ]. An example of a SE (β-mannanase) is a type of enzyme that targets hard-to-digest ingredients in feed, and an enzyme complex is intended to simultaneously increase the digestibility of various nutrients in feed by adding diverse enzymes at the same time [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Comparison study between single enzyme and multienzyme complex in distiller’s dred grains with soluble supplemented diet in broiler chicken

Kwak,

Ha,

Park

et al. 2024

J Anim Sci Technol

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Upregulation of the nutritional value of feed is the major target of various studies in the livestock industry, and dietary enzyme supplementation could aid in digesting the nondegrading nutrients of grains in feed ingredients. Dried distillers’ grains with solubles (DDGS) is a byproduct of the fermentation process in the beverage industry and can be used as a large supply source of fiber in feed. Therefore, we conducted an experiment with male broiler chickens to investigate the effect of various types of enzymes on DDGS and compare the efficacy of single enzyme and multienzyme complexes on growth performance and gut environments in broiler chickens. We used 420 1-day-old broiler chickens (Ross 308), and they were allotted into 4 dietary treatments with seven replications (CON, corn-soybean meal [SBM] diet; NC, DDGS supplemented diet; SE, 0.05 % of mannanase supplemented DDGS-based diet; MC, 0.10% of multienzyme complex (mannanase and xylanase, glucanase) supplemented DDGS-based diet. The dietary exogenous enzyme in the DDGS-supplemented diet could improve growth performance as much as the growth of the control group, and digestibility of dry matter, crude protein, and gross energy were significantly increased by enzyme addition in groups of chicks fed DDGS-supplementation diet. Moreover, the populations of pathogenic bacteria, coliforms, and Bacteroidetes were significantly decreased by enzyme supplementation, which might lead to improved gut mucus-secreting cells and inflammatory cytokines in the jejunum. Collectively, dietary single enzyme and multienzyme complexes could improve gut environments, including intestinal immune responses and gut microbial population, and lead to improvement of growth performance in broiler chickens.

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Effects of applying cellulase and starch on the fermentation characteristics and microbial communities of Napier grass (Pennisetum purpureum Schum.) silage

Cited by 13 publications

References 48 publications

Study on Dynamic Fermentation of Oat Silage Assisted by Exogenous Fibrolytic Enzymes

Study on Dynamic Fermentation of Oat Silage Assisted by Exogenous Fibrolytic Enzymes

Nutritive and Fermentative Traits of African Stargrass (Cynodon nlemfuensis Vanderyst) Forage Preserved for Silage and Haylage

Comparison study between single enzyme and multienzyme complex in distiller’s dred grains with soluble supplemented diet in broiler chicken

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