Lucerne tannins. II. Isolation of tannins from lucerne, their nature and influence on the digestive enzymes <i>in vitro</i>

Milić, B.; Stojanović, Srdjan Z.; Vucurevic, N.

doi:10.1002/jsfa.2740231003

Cited by 44 publications

(12 citation statements)

References 9 publications

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“…Legumes in general have long been known for higher percentage of CP, Ca, and Mg than grasses. Forages also can contain antiquality factors such as saponin, tannin, and trypsin inhibitor (Walter et al, 1955;Millic et al, 1972;Jung and Fahey, 1983). Tall fescue is often infected with the endophyte fungus, Neotyphodium coenophialum (Glenn et al, 1996), resulting in several disorders in grazing ruminants and horses (Stuedemann and Hoveland, 1988).…”

Section: Start Of 4-h Periodsmentioning

confidence: 99%

Behavior, preference for, and use of alfalfa, tall fescue, white clover, and buffalograss by pregnant gilts in an outdoor production system1

Rachuonyo

Allen

McGlone

2005

Journal of Animal Science

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Sustainable outdoor pig production requires vegetation that can maintain ground cover, assimilate manure nutrients, and prevent soil erosion. Two experiments were conducted to evaluate the suitability of four forages: alfalfa (Medicago sativa), tall fescue (Festuca arundinacea), white clover (Trifolium repens), and buffalograss (Buchloe dactyloides) for grazing or ground cover in pastures for pigs. Each forage plot covered 7.5 m2, with nine replicates in a randomized block design. In Exp. 1, eight pregnant gilts had free access to all forages during a 2-d adjustment period. Immediately thereafter, pairs of gilts were assigned randomly to one of each of four blocks of the four forages during a 2-d measurement period. The percentage of ground cover for each forage was visually estimated at 0, 24, and 48 h of study. Behavioral data, including walking, eating, grazing, rooting, drinking, standing, lying, and time spent in hut were video-monitored continuously for 48 h. Initial percentage of ground cover was 100% for all species. By 48 h, percentage of ground cover decreased (P < 0.001) for white clover (11.3 +/- 0.88%) and alfalfa (36.3 +/- 0.88%), but not for tall fescue (98.0 +/- 0.88%) or buffalograss (98.0 +/- 0.88%). Gilts spent more (P < 0.01) time grazing white clover (16.3 +/- 1.97 min/d) and alfalfa (11.2 +/- 1.97) than tall fescue (0.8 +/- 1.97) or buffalograss (0.3 +/- 1.97), and rooted more (P < 0.04) white clover than other forages. In Exp. 2, six gilts from the initial group were put on six blocks of the four forages. Each gilt was assigned randomly to three replicates of each forage, including alfalfa, tall fescue, or buffalograss (white clover was excluded because of damage by gilts during Exp. 1), and gilts grazed single forages for 2 d. After this grazing period, the percentage of ground cover was less (P < 0.01) for alfalfa than for buffalograss or tall fescue (37.5 +/- 0.38, 96.7 +/- 0.39, 96.3 +/- 0.39%, respectively). With access to a single forage, pregnant gilts spent more (P < 0.01) time grazing alfalfa (15.8 +/- 2.36 min/d) than buffalograss (1.5 +/- 2.36) or tall fescue (0.7 +/- 2.37). These gilts clearly preferred grazing white clover and alfalfa, and rooting and eating white clover compared with buffalograss or tall fescue. Rates of ground cover loss were less (P < 0.01) for tall fescue and buffalograss than for the more preferred forages. Less preferred forages could have potential as pasture for swine when the primary objective is ground cover maintenance rather than nutrient supply.

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Section: Start Of 4-h Periodsmentioning

confidence: 99%

Behavior, preference for, and use of alfalfa, tall fescue, white clover, and buffalograss by pregnant gilts in an outdoor production system1

Rachuonyo

Allen

McGlone

2005

Journal of Animal Science

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“…et al. 1972, Griffiths 1979, Barry and Duncan 1984, have indicated Consequently, the best equation for prediction of dietary crude tannins have the capacity to bind with proteins to form complexes protein contains these 2 variables.…”

Section: Prediction Of Diet Qualitymentioning

confidence: 99%

Value of Multiple Fecal Indices for Predicting Diet Quality and Intake of Steers

Leite¹,

Stuth²

1990

Journal of Range Management

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The relationship of fecal nitrogen fractions and condensed tannins to dietary crude protein, in vitro organic matter digestibility, and intake of steers was assessed to determine the suitability of these multiple fecal indices for predicting quality of animal diets under free-roaming conditions. Research was conducted on the Texas A&M Native Plant and Animal Conservancy near College Station, located in the Post Oak Savannah region of Texas. Regression equations were used to evaluate relationships between dietary intake and quality to fecal variables. Dietary crude protein, digestible organic matter, organic matter intake, crude protein intake, and digestible energy intake were determined from previous studies. Corresponding fecal samples were anaiyzed for absolute output, proportions, and concentrations of nitrogen and selected fractions of fecal organic matter, as well as fecal condensed tannins, proportions of fecal monocot and dicot fragments, and fecal organic matter. In general, no fecal parameter by itself had a high correlation with dietary variables when expressed on a proportion or concentration basis. A combination of fecal indexes accounted for more variation in dietary parameters than fecal nitrogen. Fecal nitrogen fractions did not improve the predictive power of multiple variable models. Equations predicting dietary crude protein (9%) and crude protein intake yielded the highest coefficients of determination (R* = 57 and 31, respectively). Multiple fecal indices used in this study were of limited value in predicting diet quality and intake.

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“…One per cent tannin fed to chickens influenced weight gain and depressed feed conversion by 6 per cent [3]. Actually, tannins exhibit a high binding affinity for a number of enzymes and behave as enzyme inactivators [61]. The ability of tannins to lower protein digestibility is not the only factor explaining the adverse nutritional effects induced by them.…”

Section: Factors Affecting Protein Digestibilitymentioning

confidence: 99%

The Nutritive Value of Seed Proteins

Eggum¹,

Beames²

1983

Seed Proteins

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Lucerne tannins. II. Isolation of tannins from lucerne, their nature and influence on the digestive enzymes in vitro

Cited by 44 publications

References 9 publications

Behavior, preference for, and use of alfalfa, tall fescue, white clover, and buffalograss by pregnant gilts in an outdoor production system1

Behavior, preference for, and use of alfalfa, tall fescue, white clover, and buffalograss by pregnant gilts in an outdoor production system1

Value of Multiple Fecal Indices for Predicting Diet Quality and Intake of Steers

The Nutritive Value of Seed Proteins

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