In vitro digestibility and crude protein and mineral concentrations of guinea grass accessions in a humid tropical region of Puerto rico

Samples from five tropical grass species: Guinea (Panicum maximum), Pangola (Digitaria decumbens), Congo (Brachiaria ruziziensis), Merker (Pennisetum purpureum), and Star (Cynodon nlemfuensis), were harvested during nine weeks at ages from 7 to 63 days in southwestern Puerto Rico. The grasses were fertilized at the rate of 4480 kg/ha per year with a 15-5-10 fertilizer. The crude protein content of all grasses exceeded 10 percent up through 28 days of regrowth. Grasses declined in crude protein from a mean of 18.1 percent at 7 days to 5.6 percent at 63 days. A narrower range was observed between grasses from 42 to 63 days. The five tropical grasses possessed high contents of structural carbohydrates, principally cellulose and lignin, which increased with age, except in Pangola grass. Silica did not change uniformly with age in any of the grasses while hemicellulose was characterized by marked fluctuations. Digestibility values were lower at all stages of growth than in temperate forages of similar ages. Cellulose was negatively correlated with in vitro digestibility in all grasses except Pangola. Lignin appeared to be the predominant factor in determining digestibility. The relationship of silica to digestibility varied between species, being positive in some (Guinea and Congo) and negative in others (Star, Pangola, and Merker). The grasses may be ranked as follows with regard to their chemical composition and digestibility: Merker > Congo > Star > Guinea > Pangola. Pangola grass, though lowest in in vitro digestibility, declined least with advancing age, thus maintaining a more constant quality for a longer period of time.

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The assessment of herbage legume varieties. II. In vitro digestibility, water soluble carbohydrate, crude protein and mineral content of primary growth of clover and lucerne

The Journal of Agricultural Science ◽

10.1017/s0021859600063656 ◽

1966 ◽

Vol 66 (3) ◽

pp. 351-357 ◽

Cited By ~ 21

Author(s):

W. Ellis Davies ◽

G. ap Griffith ◽

A. Ellington

Keyword(s):

White Clover ◽

Crude Protein ◽

Dry Matter ◽

Red Clover ◽

Water Soluble ◽

Soluble Carbohydrates ◽

Soluble Carbohydrate ◽

In Vitro Digestibility ◽

Primary Growth

The primary growth of eight varieties of three species–white clover (3), red clover (4) and lucerne (1)–was sampled at fortnightly intervals and the percentage dry matter, in vitro digestibility, crude protein, water soluble carbohydrates, P, Ca, K, Na and Mg were determined.Differences between species were nearly always significant and the general order of merit was white clover, red clover and lucerne. The exceptions were for dry-matter percentage where this order was reversed, and red clover had the lowest Na and highest Mg content.

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Nutrient Quality and in Vitro Digestibility of Bio-Ammoniated Rice Straw Bales

Buletin Peternakan ◽

10.21059/buletinpeternak.v44i3.53409 ◽

2020 ◽

Vol 44 (3) ◽

Author(s):

Cuk Tri Noviandi ◽

Dibya Ratnopama ◽

Ali Agus ◽

Ristianto Utomo

Keyword(s):

Rice Straw ◽

Crude Protein ◽

Production Method ◽

Proximate Analysis ◽

Gas Production ◽

Crude Fiber ◽

In Vitro Digestibility ◽

Nutrient Quality ◽

Randomized Design

This study was done to determine the effects of bale sizes of bio-ammoniated rice straw on its nutrient quality and in vitro digestibility. Rice straw were bio-ammoniated by adding 2 g urea and 1 g probiotic/kg DM. By following a completely randomized design, rice straw was baled in 3 different weights (15, 25, and 35 kg) with six replications for each treatment, and then stored for 3 weeks. In the end of the week 3, bales were opened, aired, and then sampled for proximate analysis (dry matter, organic matter, crude protein, and crude fiber) and digestibility by in vitro gas production method. Using analysis of variance method, the proximate data showed that greater the bales size (15, 25, and 35 kg) increased crude protein (7.59, 7.86, and 9.95%, respectively; P<0.05) and decreased crude fiber contents (24.1, 22.1, and 18.8%, respectively; P<0.05). By increasing the size of bales also increased a, b, and c fractions (-0.79, 0.26, and 0.82 mL/100 mg DM; 20.2, 18.2, and 17.6 mL/100 mg DM; 0.012, 0.014, and 0.019 mL/h, respectively; P<0.05) as well as gas production (11.4, 11.5, and 13.8 mL/100 mg DM, respectively; P<0.05). It can be concluded that packing bio-ammoniated rice straw in 35 kg bale is the most effective way in increasing nutrient quality and digestibility of rice straw.

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YIELD AND QUALITY OF SOME KALE-CORN COMBINATIONS

Canadian Journal of Plant Science ◽

10.4141/cjps80-119 ◽

1980 ◽

Vol 60 (3) ◽

pp. 807-811 ◽

Cited By ~ 2

Author(s):

R. S. FULKERSON

Keyword(s):

Protein Content ◽

Corn Stover ◽

Crude Protein ◽

Dry Matter ◽

In Vitro Digestibility ◽

Crude Protein Content ◽

Yield And Quality ◽

Row Width

Midas marrowstem kale (Brassica oleracea L.) was grown in different row width associations with United 106 corn (Zea maize L.) in two studies and ensiled in different moisture blends with corn stover in another. Highest dry matter yields were obtained where a single row of kale was grown at 30 cm to the side of a corn row. This combination also provided the lowest moisture content feed and the highest in vitro digestibility and crude protein content. Changing the corn row width had no significant effect upon yield, plant height, in vitro digestibility, kale leaf or corn ear content. Blending kale with corn stover to provide a silage of about 70% moisture increased the digestibility and protein content of the feed and provided a silage that kept well in storage.

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CHEMICAL COMPOSITION AND IN VITRO DIGESTIBILITY OF RANGE FORAGE PLANTS OF THE STIPA-BOUTELOUA PRAIRIE

Canadian Journal of Plant Science ◽

10.4141/cjps67-028 ◽

1967 ◽

Vol 47 (2) ◽

pp. 161-167 ◽

Cited By ~ 14

Author(s):

S. Smoliak ◽

L. M. Bezeau

Keyword(s):

Crude Protein ◽

Nutritive Value ◽

Calcium Content ◽

Early Spring ◽

In Vitro Digestibility ◽

Native Grasses ◽

Stages Of Growth ◽

Artemisia Species ◽

Shrubby Species

Five native grasses and one sedge of the Stipa-Bouteloua prairie, three introduced grasses collected at five stages of growth, and four shrubby species collected at three stages of growth were analyzed for proximate chemical constituents.The amounts of phosphorus and digestible and crude protein of all species decreased with maturity, while the cellulose increased. Introduced grasses generally contained more crude protein than native grasses. Shrubby species were higher in crude protein and phosphorus than native grasses. No consistent trend was observed in relative total ash and calcium content at progressive stages of development. The estimated nutritive value index was high for all grasses and low for two Artemisia species. The seasonal declines in crude protein and phosphorus suggest that protein and phosphorus supplements are desirable for range cattle during the fall, winter, and early spring.

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In situ degradability of organic matter, crude protein and cell wall of various tree forages

Animal Science ◽

10.1017/s0003356100037235 ◽

1992 ◽

Vol 55 (1) ◽

pp. 29-34 ◽

Cited By ~ 18

Author(s):

P. Kamatali ◽

E. Teller ◽

M. Vanbelle ◽

G. Collignon ◽

M. Foulon

Keyword(s):

Cell Wall ◽

Organic Matter ◽

Leucaena Leucocephala ◽

Crude Protein ◽

In Vitro Digestibility ◽

Sesbania Sesban ◽

Holstein Friesian ◽

Ruminal Degradation

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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Selection for crude protein content in Phalaris tuberosa L. I. Response to selection and preliminary studies on correlated responses

Australian Journal of Agricultural Research ◽

10.1071/ar9690643 ◽

1969 ◽

Vol 20 (4) ◽

pp. 643 ◽

Cited By ~ 6

Author(s):

RJ Clements

Keyword(s):

Crude Protein ◽

Nutritive Value ◽

Breeding Population ◽

In Vitro Digestibility ◽

Seedling Vigour ◽

Relative Growth ◽

Relative Growth Rates ◽

Selection For ◽

Pasture Plant

In a highly variable breeding population of P. tuberosa, marked responses were obtained to three generations of selection for high and low crude protein concentration (percentage nitrogen x 6.25) in whole tillers at heading. Total response was similar in each direction, and realized heritability estimates were h2 = 0.25 and h2 = 0.20 in the high and low directions respectively. The responses were accompanied by positively correlated changes in in vitro digestibility and in characters commonly used as indicators of nutritive value of herbage. However, there were large negatively correlated changes in seedling vigour, relative growth rates, and other morphological and physiological characters. The implications of the results for pasture plant breeding are discussed.

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