Rapeseed meal in rations for laying hens: A review of the effect on egg quality

Fenwick, G. R.; Curtis, R. F.

doi:10.1002/jsfa.2740310602

Cited by 17 publications

(10 citation statements)

References 64 publications

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“…Darkening of egg yolk and chicken skin has been reported previously (Fenwick and Curtis, 1980 ) and therefore was expected feeding Brassica co-products. Darker egg yolk and broiler skin is preferred in countries such as Mexico where pigments are intentionally added to feed to achieve that result (Grčević et al, 2018 ).…”

Section: Discussionsupporting

confidence: 66%

Brassica napus and Brassica juncea extruded-expelled cake and solvent-extracted meal as feedstuffs for laying hens: Lay performance, egg quality, and nutrient digestibility

Smit

Beltranena

2020

Poultry Science

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Two experiments evaluated feeding Brassica ( B. ) napus (canola) or B. juncea co-products to brown-shelled egg laying hens. In Exp. 1, diets including 20% B. napus or B. juncea extruded-expelled cakes ( NC, JC ) or solvent-extracted meals ( NM, JM ) compared to a control diet with no Brassica co-products, were fed to 120 hens (4 hens/cage, n = 6) for 36 wk. In Exp. 2, DM, gross energy, CP and amino acid ( AA ) retention/digestibility was determined by feeding diets containing 30% B. napus or B. juncea cakes or meals and basal diet to 240 hens (8 hens/pair of cages, n = 6) for 7 d. Cakes averaged 40 g/kg lower moisture, 28 g/kg lower CP, and 84 g/kg greater fat content compared with meals. In Exp. 1, there was no effect of diet on lay percentage or BW throughout the experiment. Feed consumption was 3.5 g/d lower in layers fed JM compared with controls and egg: feed was reduced by 14 mg egg/g feed in layers fed JC ( P < 0.01). Although eggs from layers fed NM were 0.7 g heavier than controls, eggs from layers fed NC, JM or JC were 1.4 g lighter than controls ( P < 0.01). Eggs from layers fed Brassica diets contained a greater proportion (1.6%-points) of monounsaturated fatty acids compared with controls ( P < 0.01). Eggs from layers fed B. juncea had a relatively greater proportion (0.2%-points) of C18:3 (n3) compared with those of layers fed B. napus diets ( P < 0.01). Feeding Brassica diets reduced digestibility of DM (5%-points), gross energy (7%-points) and CP (4%-points) vs. basal ( P < 0.01). The digestibility of indispensable AA except tryptophan, was reduced feeding Brassica diets vs. basal ( P < 0.01). We concluded that feeding B. napus and B. juncea extruded-expelled cakes and solvent-extracted meal at 20% of diets to hens supported acceptable lay performance and egg quality over a 36 wk production cycle. Digestibility data indicated that indispensable AA in Brassica co-products had moderately high (75 to 85%) apparent ileal digestibility.

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Section: Discussionsupporting

confidence: 66%

Brassica napus and Brassica juncea extruded-expelled cake and solvent-extracted meal as feedstuffs for laying hens: Lay performance, egg quality, and nutrient digestibility

Smit

Beltranena

2020

Poultry Science

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“…Glucosinolates and sinapine occurring in rapeseed are adverse compounds that affect poultry production (Fenwick and Curtis, 1980). Rapeseed meal is a typical case, at least in colder parts of the world.…”

Section: Specific Ingredientsmentioning

confidence: 99%

“…Fish taint in eggs has been attributed to sinapine (Fenwick and Curtis, 1980), a compound that has not been reduced by plant breeding programmes. The taint produced by sinapine is clearly associated with animal genetic features, as this has only been observed in eggs from brown layers, and not in white eggs (Fenwick and Curtis, 1980).…”

Section: Specific Ingredientsmentioning

confidence: 99%

Breeding for feed efficiency and adaptation to feed in poultry

Carré

Mignon-Grasteau

Juin³

2008

World's Poultry Science Journal

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The following paper reviews the current data regarding the physiological origins of variations in feed efficiency, and the effects of genetic selection on energy balance parameters. Effects of diet composition on response to genetic selection are considered by focusing on three feed factors: protein concentration, energy concentration and utilisation of specific ingredients. Analyses of effects of genetic selection on responses to diet composition highlight the problems associated with the increased dietary protein concentrations needed by the latest commercial broilers as a result of genetic selection. The advantages and disadvantages in producing lean birds are discussed from the point of view of feed efficiency and adaptation to feed variation. Lastly, the problems of variation in digestibility resulting from broiler selection are discussed.

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“…Large variations in the contents of different amino acids of rapeseed meal cane be noted. These variations can be explained on the basis of differences in genetic background, agroclimatic conditions, procedures adopted for oil extraction and analytical techniques (FENWICK and CURTIS, 1980).…”

Section: Amino Acidsmentioning

confidence: 99%

“…Feeding experiments have revealed that its inclusion in the diet of the experimental animals leads to the deposition of fat in the heart tissue and eventually to myocardial lesions (CORNER et al, 1985). Although reports of such experiments with human beings are lacking, results from animal trials have discouraged its large scale use in human diets (FENWICK and CURTIS, 1980).…”

Section: Introductionmentioning

confidence: 99%

Possibilities and limitations of feeding rapesseed meal to broiler chicks

Zeb¹

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The meal left after the extraction of oil has a protein content of up to 50%. Its use is however complicated by several anti-nutrients, the most prominent of them being the glucosinolates. These are sulphur rich compounds found in all members of the cruciferae family. Their hydrolysis products hamper the normal functioning of thyroid gland, resulting among other effects, in decreased levels of thyroid hormones production. These hormones are required to control the normal running of metabolism.According to BELL, (1984) rapeseed would have been the most unlikely plant to be used for food supply, if its toxic factors were known before. It is to the credit of Canadian researchers in this field that the first low erucic acid variety was developed in 1968 and the first double low variety was released in 1974. The terms "double low" or "double zero" refer to low levels of erucic acid and glucosinolates. Some of the varieties are even called triple zero due to further improvement through reducing the fibre content (PUSZTAI, 1989) The name canola was adopted for the double low varieties of rapeseed in 1979. By definition Canola seeds contain less than 2% erucic acid and less than 30 µmoles glucosinolates in its defatted meal. Although the United States Department of Food and Drug Administration recognised Canola as a separate species, in the scientific writings the names canola and double low or double zero-rapeseed are used interchangeably.Although genetic manipulations have introduced much changes in the chemical composition of rapeseed through reduction in erucic acid and glucosinolates, these antinutrients have not yet been totally removed. These are, also, not the only factors detracting from the nutritional worth of rapeseed. The carbohydrates in the meal, which are mostly pectins, cellulose and amyloids, are not regarded as readily digestible, leading to low metabolizable energy content. Phytates present in the rapeseed meal cause the binding of divalent minerals and some proteins. The phenolic compounds have their own effects, the most prominent and thoroughly investigated being the egg taint or the fishy odour in the eggs of brown-shelled-egg-layers.Reduction in the glucosinolate content in rapeseed through quality breeding and other techniques has been limited only to alkenyl-glucosinolates. Almost half of the remaining glucosinolates in the double improved varieties are the indolyl glucosinolates. Seen from a purely genetic point of view, it would not, theoretically, be possible to bring the glucosinolate content in rapeseed meal to zero. This means they will continue to pose problems if other methods could not be devised to remove them from the rapeseed meal.Situation in Pakistan in this regards is different. Bulk of the rapeseed and hence of rapeseed meal is that of high glucosinolate-varieties. And we will have to wait for quite a long time till the meal of the Canola type rapeseed varieties is available in some mentionable quantities.A possible alternative to the breeding approach can be a technological ...

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Rapeseed meal in rations for laying hens: A review of the effect on egg quality

Cited by 17 publications

References 64 publications

Brassica napus and Brassica juncea extruded-expelled cake and solvent-extracted meal as feedstuffs for laying hens: Lay performance, egg quality, and nutrient digestibility

Brassica napus and Brassica juncea extruded-expelled cake and solvent-extracted meal as feedstuffs for laying hens: Lay performance, egg quality, and nutrient digestibility

Breeding for feed efficiency and adaptation to feed in poultry

Possibilities and limitations of feeding rapesseed meal to broiler chicks

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