Influence of chemical, enzymatic and phytogenic ensiling preparations on digestibility, degradability and PDI and NEL content of lucerne and red clover

Komprda, T.; Homolka, P.; Harazim, J.

doi:10.1016/0377-8401(96)00960-1

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…The nutritive value of silages or hay is highly influenced by species and cultivars (Pozdíšek et al, 2003). Ruminal degradability is influenced by many factors, mainly by the stage of maturity, forage species and preservation method (Hoffman et al, 1993;Komprda et al, 1996;Machačová et al, 1998;Elizalde et al, 1999).…”

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confidence: 99%

Effects of grass species on ruminal degradability of silages and prediction of dry matter effective degradability

Jančík¹,

Koukolová²,

Kubelková³

et al. 2009

CZECH J ANIM SCI

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Forty samples of grass silages, made from the five most widely used grass species in ruminant nutrition (Dactylis glomerata L., Phleum pratense L., Lolium perenne L., Festuca arundinacea L. and hybrid Felina) were tested in the present study. These grass species conserved by an ensiling process were compared among each other according to dry matter (DM) rumen degradability parameters (a = portion of DM solubilized at initiation of incubation, b = fraction of DM potentially degradable in the rumen, c = rate constant of disappearance of fraction b and ED DM = effective degradability of DM, estimated for each ingredient assuming the rumen solid outflow rates of 0.02 (ED DM2 ), 0.05 (ED DM5 ) and 0.08 (ED DM8 ) h -1 ). Based on the chemical composition of grass silages the regression equations for prediction of ED DM were evaluated. The influence of the ensiling process on dry matter degradability parameters was also assessed. The best values of ED DM were determined for Lolium perenne (ED DM2 = 753.2, ED DM5 = 631.1 and ED DM8 = 567.7 g/kg DM). The best predictor was NDF (R 2 -values of 0.757 (ED DM2 ), 0.863 (ED DM5 ) and 0.906 (ED DM8 )). Using two predictors the accuracy level increased. The combination of CF and NDF gave R 2 -values 0.892, 0.920 and 0.929 for ED DM2 , ED DM5 and ED DM8 , respectively. The regression equations based on the most important grass species harvested in different vegetation periods seem to be a useful tool for practical use. No significant (P < 0.05) effect of the ensiling process in relation to dry matter rumen degradability parameters was proved.

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confidence: 99%

Effects of grass species on ruminal degradability of silages and prediction of dry matter effective degradability

Jančík¹,

Koukolová²,

Kubelková³

et al. 2009

CZECH J ANIM SCI

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“…Values of pH and dry matter content are the most important factors that dictate the intensity of proteolysis, but they cannot stop it completely (Carpintero et al, 1979). Maximal control of proeolytic processes is achieved with chemical conservants based on organic acids and their salts (Komprda et al, 1996). However, chemical conservants are used very rarely in Europe and they are banned in the USA (Đorđević and Dinić, 2003).…”

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confidence: 99%

The influence of compression level and inoculation on biochemical changes in lucerne silages

et al. 2011

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The effect of different levels of compression (A1 = 420 gdm-1, A2 = 560 gdm-1) and inoculation (B1 = no inoculant, B2 = with inoculant) on changes in chemical composition, proteolysis and quality of lucerne silage was investigated in this paper. Based on the results of chemical analysis we found that in silages with more compressed material there was a reduction in the amount of ammonia nitrogen, soluble nitrogen and acetic acid, and increased content of protein nitrogen (‘true’protein) and production of lactic acid (p<0.05). With the inoculation of the ensiling material the production of ammonia nitrogen and acetic acid was reduced but the content of lactic acid and acidity was increased (p<0.05). The interaction of both investigated factors (A×B) induced a decrease in the proteolysis degree, increase of lactic acid production and decrease in acetic acid production, and decrease in pH values (p<0.001) in investigated silages. The investigated factors had less influence on the chemical composition of lucerne material, and the significant variations were observed in fat and NFE contents. On the basis of this investigation the degree of compression is the most important parameter in ensiling technology. With the adequate compression and reduction of air in the starting material, the aerobic phase is reduced and the activity of proeolytic enzymes is decreased. In practice the special attention should be given to factors on which directly or indirectly the level of compression of ensiled material depends: wilting, cutting, object selection and/or selection of machines used for compression

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Efficiency of microbial protein synthesis on red clover and ryegrass silages supplemented with barley by rumen simulation technique (RUSITEC)

Jaurena

Moorby

Davies

2005

Animal Feed Science and Technology

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Influence of chemical, enzymatic and phytogenic ensiling preparations on digestibility, degradability and PDI and NEL content of lucerne and red clover

Cited by 3 publications

References 11 publications

Effects of grass species on ruminal degradability of silages and prediction of dry matter effective degradability

Effects of grass species on ruminal degradability of silages and prediction of dry matter effective degradability

The influence of compression level and inoculation on biochemical changes in lucerne silages

Efficiency of microbial protein synthesis on red clover and ryegrass silages supplemented with barley by rumen simulation technique (RUSITEC)

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