Cell-Wall Constituents and In Vitro Digestibility of Napier Grass (Pennisetum Purpureum)

AbstractLeaves of Leucaena leucocephala, Sesbania sesban and Calliandra callothyrsus were harvested in Rwanda from young shoots at 8 weeks after the first cutting. They were dried, ground and incubated at the same time in polyester bags in three non-lactating Holstein-Friesian cows each fitted with a ruminal cannula. The bags were removed at 0, 2, 4, 8, 24, 48, 72 and 144 h after the start of incubations. The different parameters characterizing extent and rate of ruminal degradation of organic matter (OM), neutral-detergent fibre (NDF), and crude protein (CP) were calculated. In vitro digestibility of residual protein after 24 h and 48 h incubation was also determined. Sesbania sesban had lowest cell wall contents and gave highest ruminal degradability for OM, NDF and CP. Leucaena leucocephala was degraded to a lesser extent, but its undegraded protein had a somewhat higher in vitro digestibility. In contrast, protein of Calliandra callothyrsus was poorly degraded and digested. The proportion and composition of cell wall could not explain these differences in digestion characteristics and other measurements, such as tannins, were incriminated. Increased ruminal incubation time augmented the extent of ruminal degradation and reduced in vitro digestibility of undegraded protein but did not affect the undigestible protein fraction.

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Effects of fibrolytic enzymes and lactic acid bacteria on fermentation quality and in vitro digestibility of Napier grass silage

Italian Journal of Animal Science ◽

10.1080/1828051x.2019.1681910 ◽

2019 ◽

Vol 18 (1) ◽

pp. 1438-1444 ◽

Cited By ~ 1

Author(s):

Smerjai Bureenok ◽

Sioudome Langsoumechai ◽

Nittaya Pitiwittayakul ◽

Chalermpon Yuangklang ◽

Kraisit Vasupen ◽

...

Keyword(s):

Lactic Acid ◽

Lactic Acid Bacteria ◽

Napier Grass ◽

In Vitro Digestibility ◽

Fibrolytic Enzymes ◽

Grass Silage ◽

Fermentation Quality

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Yield and nutritional value of BRS Capiaçu grass at different regrowth ages

Semina Ciências Agrárias ◽

10.5433/1679-0359.2019v40n5p2045 ◽

2019 ◽

Vol 40 (5) ◽

pp. 2045 ◽

Cited By ~ 1

Author(s):

Flávio Pinto Monção ◽

Marco Aurélio Moraes Soares Costa ◽

João Paulo Sampaio Rigueria ◽

Marielly Maria Almeida Moura ◽

Vicente Ribeiro Rocha Júnior ◽

...

Keyword(s):

Dry Matter ◽

Northern Region ◽

Matter Content ◽

Neutral Detergent Fiber ◽

Pennisetum Purpureum ◽

In Vitro Digestibility ◽

Dry Matter Content ◽

Elephant Grass ◽

Dry Matter Digestibility

The objective was to evaluate the productivity, chemical composition, ruminal degradability of dry matter and digestibility of BRS capiaçu grass (Pennisetum purpureum Schum.) managed at five regrowth ages. A completely randomized design with ten replications was used in the BRS capiaçu elephant grass subjected to five cutting intervals (30, 60, 90, 120 and 150 days) in the summer, making a total of 50 plots with a useful area of 4 x 2 m. There were daily increases in the dry matter production in the order of 382 kg ha-1, with 49,859 kg ha-1 being produced at 150 regrowth days. The dry matter content and organic matter linearly increased (P < 0.01) at different regrowth ages. The crude protein content, in vitro dry matter digestibility and in vitro digestibility of neutral detergent fiber linearly reduced (P < 0.01) 0.037%, 0.196% and 0.256% per day, respectively. Potential degradability of dry matter decreased from 68.9% at 30 days to 44.7% at 150 regrowth days (0.194 percentage units per day). The rate of degradation of fraction B 'c' was not modified (P = 0.94), averaging 1.46% hour-1. In the cultivation of BRS capiaçu elephant grass in the summer season, in the northern region of Minas Gerais, the age for harvesting between 90 and 120 days of regrowth is recommended.

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GENETIC VARIATION FOR FORAGE QUALITY OF ALFALFA STEMS

Canadian Journal of Plant Science ◽

10.4141/cjps87-142 ◽

1987 ◽

Vol 67 (4) ◽

pp. 1057-1067 ◽

Cited By ~ 21

Author(s):

D. R. BUXTON ◽

G. C. MARTEN ◽

J. S. HORNSTEIN

Keyword(s):

Cell Wall ◽

Genetic Variation ◽

Medicago Sativa ◽

Crude Protein ◽

Nutritive Value ◽

Growth Traits ◽

Forage Quality ◽

In Vitro Digestibility ◽

Medicago Sativa L

When normally harvested for hay, the basal portion of alfalfa (Medicago sativa L.) stems is low in forage quality. This study was conducted to determine whether genetic variation for in vitro digestible dry matter (IVDDM) and crude protein (CP) concentration of stems of perennial Medicago spp. could be identified and whether morphological and chemical traits were associated with variation in these characteristics of stems. The lower six nodes and internodes of stems and total herbage from 64 Plant Introduction (PI) accessions and five cultivars of field-grown plants were harvested twice when most plants were at the early seed-pod stage of maturity. Several morphological and growth traits were measured, and both stems and total herbage were evaluated for IVDDM and CP concentration. Covariant analysis was used to adjust in IVDDM and CP concentration of stems for differences in plant maturity. Significant variation for IVDDM and CP concentration in stems existed among the cultivars and among the accessions. Some accessions had significantly higher stem IVDDM or CP concentration than control cultivars. The M. sativa accession, PI 440496, had the fourth highest stem IVDDM and third highest stem CP, with concentrations of 374 and 79 g kg−1, respectively. The number of ridges on stems (stem shape) was significantly correlated with stem IVDDM and CP concentration with average correlation coefficients of 0.30 and 0.35, respectively. Cell-wall concentration and lignin concentration per unit cell wall of stems were both negatively correlated with stem IVDDM and CP concentration. Selection for improved nutritive value of stems may have potential for improving the nutritive value of alfalfa herbage.Key words: Alfalfa, forage quality, crude protein, in vitro digestibility, Medicago sativa L.

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COMPARATIVE CELL WALL CONSTITUENT LEVELS OF TANNIN-FREE AND TANNIN-CONTAINING CULTIVARS OF FABABEANS (VICIA FABA L.)

Canadian Journal of Animal Science ◽

10.4141/cjas78-096 ◽

1978 ◽

Vol 58 (4) ◽

pp. 775-781 ◽

Cited By ~ 17

Author(s):

R. R. MARQUARDT ◽

J. A. McKIRDY ◽

A. T. WARD

Keyword(s):

Cell Wall ◽

Dry Matter ◽

Condensed Tannin ◽

Unit Weight ◽

In Vitro Digestibility ◽

Acid Detergent Fiber ◽

Dry Matter Digestibility ◽

Series Of Experiments ◽

Similar Basis

A series of experiments has been carried out with tannin-free and tannin-containing cultivars of fababeans. The in vitro dry matter digestibility of the cotyledon portion of the two groups of fababeans was the same (88.2%) whereas the in vitro digestibility of the testa portion of the tannin-free cultivars was much higher (27.6%) than that of the tannin-containing cultivars (9.2%). The concentrations of certain cell wall constituents in the testae of tannin-free and tannin-containing cultivars were also different (P < 0.01); the respective average values for the two groups were: condensed tannins, 0.2 and 4.9%; lignin, 4.2 and 6.2%; acid detergent fiber, 72 and 66%; and cellulose, 67 and 60%. There was a negative correlation between the in vitro dry matter digestibility and the amount per unit weight of whole beans of either condensed tannin (r = −0.86, P < 0.01) or lignin (r = −0.89, P < 0.01). When expressed on a similar basis there was no correlation between levels of cellulose or acid detergent fiber and in vitro dry matter digestibility.

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Climate, nitrogen and grass. 4. The influence of age on chemical composition and in vitro digestibility of maize (Zea mays L.) and tall fescue (Festuca arundinacea Schreb.).

Netherlands Journal of Agricultural Science ◽

10.18174/njas.v19i4.17307 ◽

1971 ◽

Vol 19 (4) ◽

pp. 264-272 ◽

Cited By ~ 1

Author(s):

B. Deinum ◽

J.G.P. Dirven

Keyword(s):

Cell Wall ◽

Zea Mays ◽

Chemical Composition ◽

Tall Fescue ◽

Festuca Arundinacea ◽

Zea Mays L ◽

In Vitro Digestibility ◽

Higher Temperature ◽

Effect Of Age

In a field experiment with maize it was found that in vitro digestibility of leaves decreased somewhat during undisturbed growth, whereas digestibility of stems decreased appreciably. This decrease in leaf digestibility was caused by a lower digestibility of later-developed leaves and by a slight decrease in digestibility during ageing of each individual leaf. In a pot experiment with tall fescue grown at 15/10, 20/15 and 25/20 deg C, it was found that a higher temperature resulted in higher concentrations of cell-wall constituents and lower digestibility, whereas during ageing the percentage of cell-wall constituents remained constant or even decreased, digestibility decreasing slightly. Results suggested that in a constant climate the effect of age on digestibility would be small, and that the great effect of age on forage quality in spring is mainly due to rising temperature and stem formation. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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