Whole Plant Grain Sorghum Silage Processing and Lasalocid Effects on Stocker Calf Performance and Rumen Fermentation

Gutierrez, G. G.; Schake, L. M.; Byers, F. M.

doi:10.2527/jas1982.544863x

Cited by 26 publications

(9 citation statements)

References 4 publications

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“…L to the basal K diet is not consistent with reports of decreased feed intake with L in cattle diets (Bartley et al, 1979;Berger et al, 1981;Gutierrez et al, 1982). Differences may be attributed to differences between species, diets or L levels.…”

Section: Resultscontrasting

confidence: 75%

“…An interaction of K and L (P<.05) was observed for molar proportions of ruminal acetate and propionate (table 4). Lasalocid in the CL diet decreased (P<.05) acetate and increased (P<.05) propionate levels compared with the C diet, which agrees with results of other studies (Fuller and Johnson, 1981;Gutierrez et al, 1982;Ricke et al, 1984;Spears and Harvey, 1984). Likewise, acetate h'i'JMeans in a row that do not have a common superscript differ (P<.lO).…”

Section: Digestibility and Nitrogen Balance Trialsupporting

confidence: 90%

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Potassium and Lasalocid Effects on Performance and Digestion in Lambs

Funk

Galyean

Ross

1986

Journal of Animal Science

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Two trials were conducted to evaluate effects of dietary potassium (K) concentration and lasalocid (L) in lamb finishing diets. Treatments were arranged in a 2 X 2 factorial and consisted of a 65% concentrate diet with 1.1% K (C), .9% K + 21.3 mg L/kg (CL), 2.1% K (P) and 2.5% K + 20 mg L/kg (PL). In trial 1, 64 fine-wool lambs (initial wt 35.3 kg) were randomly assigned to the four treatments (two pens of four wethers and four ewes/treatment) for a 56-d feeding trial. Average daily gain was not affected by K, but was increased (P less than .10) by L (.23 vs .26 kg/d). Lasalocid tended (P less than .20) to improve feed:gain ratio (5.6 vs 6.3). A K X L interaction (P less than .06) was noted for feed intake, with values of 1.37, 1.45, 1.49 and 1.51 kg X head-1 X d-1 for the C, CL, P and PL groups, respectively. In trial 2, 16 wether lambs (four/treatment fed at 2% of body weight) were used in a site and extent of digestion and nitrogen (N) balance trial, using the same four diets as in trial 1. Site of digestion was estimated from abomasal samples taken at slaughter, with indigestible acid detergent fiber as a marker. Total tract organic matter digestibility was increased (P less than .05) with added K (80.1 vs 76.4%) and L (80 vs 76.4%). Ruminal starch digestibility was not affected by added K, but was decreased (P less than .10) by added L (71.8 vs 88.2%).(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Resultscontrasting

confidence: 75%

Section: Digestibility and Nitrogen Balance Trialsupporting

confidence: 90%

Potassium and Lasalocid Effects on Performance and Digestion in Lambs

Funk

Galyean

Ross

1986

Journal of Animal Science

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“…On d 90, lasalocid increased (P<.05) total VFA concentrations and decreased (P<.05) molar proportion of butyrate. Lasalocid did not significantly affect molar proportions of acetate or propionate when compared with control steers receiving a similar level of Na and K. Decreases in acetate-to-propionate ratio have been observed in ruminants fed lasalocid (Gutierrez et al, 1982;Spears and Harvey, 1984;Funk et al, 1986). However, shifts in acetate to propionate ratio associated with lasalocid feeding have been variable (Anonymous, 1982;Spears and Harvey, 1984;Funk et al, 1986), and improvements in performance have been noted in steers fed lasalocid when VFA shifts were not apparent (Thonney et al, 1981).…”

Section: Resultsmentioning

confidence: 99%

Lasalocid and Dietary Sodium and Potassium Effects on Mineral Metabolism, Ruminal Volatile Fatty Acids and Performance of Finishing Steers

Spears

Harvey

1987

Journal of Animal Science

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Thirty Angus steers averaging 357 kg were used to: 1) determine the effect of feeding lasalocid (33 mg/kg diet) on mineral metabolism and 2) determine the effects of varying dietary sodium (Na) and potassium (K) on finishing steers fed lasalocid. Treatments consisted of: 1) control (.25% Na, .5% K); 2) lasalocid (.05% Na, .5% K); 3) lasalocid (.25% Na, .5% K); 4) lasalocid (.05% Na, 1.4% K) and 5) lasalocid (.25% Na, 1.4% K). Ruminal fluid and blood samples were collected on d 28 and 90 of the 102-d study. Gain and feed conversion tended to be higher for steers fed lasalocid with the exception of the .05% Na, 1.4% K treatment. Control steers had lower (P less than .05) erythrocyte K concentrations, reduced (P less than .05) soluble concentrations of magnesium and copper in ruminal fluid and decreased plasma concentrations of zinc (P less than .05) and phosphorus (P less than .10) at 90 d compared with steers fed lasalocid and similar concentrations of Na (.25%) and K (.5%). Increasing dietary Na from .05 to .25% in the presence of lasalocid increased (P less than (P less than .05) molar proportion of ruminal acetate at 28 and 90 d reduced (P less than .05) propionate at 90 d. Increasing K from .5 to 1.4% decreased (P less than .01) soluble Na and increased (P less than .01) soluble K concentrations in ruminal fluid. Steers fed lasalocid (.25% Na, .5% K) had lower concentrations of K (P less than .10) and zinc (P less than .10) in liver than control steers. Sodium and K level also affected tissue concentrations of certain minerals. Results suggest that dietary Na and K influence mineral metabolism and that dietary Na affects ruminal molar proportion of acetate in cattle fed lasalocid.

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“…The concentration and composition of VFA mixtures in the rumen were determined by gas-chromatography (Jouany, 1982), and rumen liquor ammonia nitrogen by the procedure of Berthelot (see Michel, 19711. Rumen gas samples were analysed by gas-chromatography (McArthur and Miltimore, 1961 The increase in the molar proportion of propionic acid in the VFA mixture as well as the drop in methane production are now well known and have been widely studied using lasalocid (Gutierrez et al, 1982 ;Herod et al, 1979 ;Horton and Stockdale, 1981 ;Ricke et al, 1981 ;Thonney et al, 1981), monensin (Durand, 1982 ;Fuller and Johnson, 1981 ;Jouany and Senaud, 1978 ;Nagaraja et al, 1981 ;Van Nevel and Demeyer, 1977), avoparcin (Chalupa et al, 1981) and salinomycin (McClure et al, 1980 ;Webb et al, 19801.…”

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confidence: 99%

Effect of lasalocid sodium on rumen fermentation and digestion in sheep

Thivend¹,

Jouany²

1983

Reprod. Nutr. Dévelop.

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Summary. Four adult sheep were fed 4 diets successively according to a Latin-square design. They were fitted with a rumen cannula and with simple cannulae at the duodenum and ileum. The basal diet (L-0) was composed of highly-pressed ensiled sugar beet pulp (56.2 %), cereal (barley and corn : 27.6 %), urea (1.5 %) and wheat straw (14.1 %). Lasalocid sodium was added to obtain the following respective amounts : 21 ppm for diet L l , 43 ppm for diet L 2 and 64 ppm for diet L 3 (table 11. ).In the rumen, lasalocid significantly increased the molar proportion of propionic acid in the volatile fatty acids (VFA) mixture at the expense of the acetic and butyric acid proportions. The total VFA concentration decreased, especially with 43 and 64 ppm (table 2). Accordingly, the proportion of methane in rumen gases decreased. The ciliate population was always lower in animals fed experimental diets L i , L 2 , and particularly L 3 . The non-food-particle-associated bacterial population also decreased ; the differences were significant only with the highest doses of lasalocid (L 3 ). At the same time, bacterial cellulolytic activity increased 10 %, indicating that qualitative modifications had taken place in the rumen bacterial population (table 3).Overall digestive utilization of organic matter (OM) decreased when lasalocid was added to the diets. This was due to a considerable reduction in forestomach digestion (12 % decrease) (table 4). A greater supply of OM rich in cell-wall carbohydrates in the duodenum would explain the lower digestibility in the small intestine of animals given diet L j and especially the L 2 and L 3 diets. No significant shift in digestion was noted in the large intestine.The composition of the non-ammonia nitrogen that entered the duodenum of sheep given lasalocid differed from that noted with the control diet (L o ) (table 5). The amount of microbial proteins was significantly lower, whilst the proportion of non-degraded feed proteins was higher. The efficiency of microbial synthesis (bacterial proteins/kg OM truly digested in the rumen) was not significantly modified by lasalocid.All these modifications in digestion observed with these diets, and resulting from changes in the qualitative and quantitative composition of flora and fauna in the rumen, have an effect on nitrogen and energy utilization in the ruminant.Introduction.

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Whole Plant Grain Sorghum Silage Processing and Lasalocid Effects on Stocker Calf Performance and Rumen Fermentation

Cited by 26 publications

References 4 publications

Potassium and Lasalocid Effects on Performance and Digestion in Lambs

Potassium and Lasalocid Effects on Performance and Digestion in Lambs

Lasalocid and Dietary Sodium and Potassium Effects on Mineral Metabolism, Ruminal Volatile Fatty Acids and Performance of Finishing Steers

Effect of lasalocid sodium on rumen fermentation and digestion in sheep

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