Copper and iodine in pig diets with high glucosinolate rapeseed meal. I. Performance and thyroid hormone status of growing pigs fed on a diet with rapeseed meal treated with copper sulphate solution or untreated and supplements of iodine, copper or a quinoxaline derivative

Lüdke, H; Schöne, F.

doi:10.1016/0377-8401(88)90072-7

Cited by 23 publications

(6 citation statements)

References 9 publications

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“…This agrees with findings of earlier experiments with pigs (Liidke et a1 1985, Ludke and Schone 1988), rats (Kujawa er al 1987) and poultry (Schone et a1 1989).…”

Section: Discussionsupporting

confidence: 94%

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Evaluation of rapeseed meals in broiler chicks: Effect of iodine supply and glucosinolate degradation by myrosinase or copper

et al. 1993

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Abstract:In rapeseed meals (RSM) of a conventional (c) or a newly bred (n) variety 117 or 44 mmol glucosinolates and glucosinolate degradation products per kg dry matter were detected. Soaking meals in aqueous myrosinase or copper sulphate solution and subsequent drying reduced the content of antinutrients by more than 90 %. Broiler chickens were fed (i) a glucosinolate-free diet, or this diet in which half the soybean meal was replaced by RSM of various origins and treatment; (ii) untreated cRSM; (iii) cRSM treated with myrosinase; (iv) cRSM treated with Cu (v) untreated nRSM; or (vi) nRSM treated with myrosinase. These diets were administered with or without supplementary iodine. Chickens receiving the iodine-deficient diets with myrosinase-treated RSM showed growth depression, incomplete feathering, leg injuries and severe goitre. In the serum T, could not be detected. Giving myrosinase-treated RSM plus iodine, or giving other RSM diets irrespective of iodine administration, no growth depression was observed. RSM diets without iodine dosage markedly increased thyroid weight : there were no differences between the RSM variants. In contrast to the treatment with myrosinase, in the sera of the chickens fed on untreated RSM or RSM treated with copper T, could be detected, suggesting that in iodine-deficient conditions differences in serum T, concentration between RSM groups indicate a differing anti-thyroid activity. With iodine supplementation the RSM had a significant effect on thyroid weight. The largest thyroids (five-fold heavier) were in the animals with myrosinase-treated cRSM. The untreated cRSM and the nRSM trebled or doubled the thyroid weight, and the myrosinase-treated nRSM trebled it. The thyroid weight of chicks fed cRSM treated with copper did not differ significantly from the glucosinolate-free control. There was evidence that heating the myrosinase-treated RMS produced anti-thyroid compounds; these should be identified in further investigations.

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“…This agrees with findings of earlier experiments with pigs (Liidke et a1 1985, Ludke and Schone 1988), rats (Kujawa er al 1987) and poultry (Schone et a1 1989).…”

Section: Discussionsupporting

confidence: 94%

“…The glucosinolate lowering effect of copper, however, corresponded with decreased anti-thyroid effect. This agrees with findings of earlier experiments with pigs (Liidke et a1 1985, Ludke andSchone 1988), rats (Kujawa er al 1987) and poultry (Schone et a1 1989).…”

Section: Discussionsupporting

confidence: 92%

Evaluation of rapeseed meals in broiler chicks: Effect of iodine supply and glucosinolate degradation by myrosinase or copper

et al. 1993

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“…Undoubtedly glucosinolates affect feed intake and growth; as a rule > 10 mmovkg diet resulted in significant impairments in pig experiments (Liidke & Schone, 1988). At such dietary levels, glucosinolates definitely act as toxicants.…”

Section: Dose Responsesmentioning

confidence: 99%

Counteracting the negative effects of rapeseed and rapeseed press cake in pig diets

Schöne¹,

Rudolph²,

Kirchheim³

et al. 1997

Br J Nutr

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Rapeseed and rapeseed press cake were tested in four long-term experiments with a total of ninetyeight pigs. Rapeseed contained 20 and rapeseed press cake 19mmol glucosinolatedkg DM. The proportion of the tested rapeseed products in feed amounted to 0 (control), 50,100 and 150 g/kg diet. Moist-heat-treated rapeseed and rapeseed press cake with an extremely low glucosinolate content were also given at 150 g/kg diet. Each dietary rapeseed product level was given with 125 or 250 pg supplementary Iflrg diet. Reduced feed intake and growth retardation were found in groups receiving 150 g rapeseed productdkg diet; in the case of rapeseed the impairments were significant. Rapeseed products 2 100 glkg diet increased the thyroid weight and decreased the serum thyroxine (T4) concentration. Higher I dosage brought the serum T4 concentration to the level of the control group and retarded thyroid enlargement. Intake of rapeseed products lowered the I content of the thyroid; however, there was no significant difference between groups given 0.9 mmol glucosinolated kg diet and those receiving three times as much. Degrading glucosinolates by moisture and heat prevented feed intake depression and growth retardation. In the case of treated rapeseed the decreased serum T4 concentration and increased thyroid weight persisted, indicating formation of some antithyroid compounds due to myrosinase (EC 3.2.3.1) activation. A maximal glucosinolate content of 2 mmolkg diet and additional I application are a prerequisite for using rapeseed products in pig feeding.

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“…Rapeseed cake (RSC) is a by-product of rapeseeds, and it contains well-balanced amino acids, especially higher content of sulphur-containing amino acids compared with soya bean meal (Woyengo et al, 2010). However, RSC as a protein source in animal feed is often restricted by glucosinolates (GLS) in RSC (Mosenthin et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Double low varieties of rapeseed (low GLS and low erucic acid; 00-RS) have been well developed in Canada, Australia and Europe during last decades. With the introduction of 00-RS varieties, the content of total GLS in rapeseed cake/meal decreased from 150 to less than 22 μmol g −1 DM (Mosenthin et al, 2016). China is the largest rapeseed producer in the world (Huang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Comparison between the effects of feeding copper sulphate‐treated and untreated rapeseed cake containing high glucosinolates on rumen fermentation, nutrient digestion and nitrogen metabolism in steers

Zhao

Gao

Xie

et al. 2021

Animal Physiology Nutrition

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Two trials were carried out to study the effects of copper sulphate (CuSO 4 ) on detoxifying glucosinolates (GLS) in rapeseed cake (RSC) and compare the effects of feeding CuSO 4 -treated and untreated RSC on nutrient digestion and nitrogen (N) metabolism in steers. In Trial 1, different concentrations of CuSO 4 solution (1.6 vs. g CuSO 4 •5H2 O L −1 ), soaking temperatures (25 vs. 60°C) and drying methods (air drying at 60°C vs. freeze drying) were allocated in a 2 × 2 × 2 factorial arrangement in vitro. In Trial 2, six steers and dietary inclusions of untreated RSC (control), CuSO 4 -

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Copper and iodine in pig diets with high glucosinolate rapeseed meal. I. Performance and thyroid hormone status of growing pigs fed on a diet with rapeseed meal treated with copper sulphate solution or untreated and supplements of iodine, copper or a quinoxaline derivative

Cited by 23 publications

References 9 publications

Evaluation of rapeseed meals in broiler chicks: Effect of iodine supply and glucosinolate degradation by myrosinase or copper

Evaluation of rapeseed meals in broiler chicks: Effect of iodine supply and glucosinolate degradation by myrosinase or copper

Counteracting the negative effects of rapeseed and rapeseed press cake in pig diets

Comparison between the effects of feeding copper sulphate‐treated and untreated rapeseed cake containing high glucosinolates on rumen fermentation, nutrient digestion and nitrogen metabolism in steers

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