Effects of dietary rapeseed meal on laying performance, egg quality, apparent metabolic energy, and nutrient digestibility in laying hens

Zhu, Liping; Wang, J.P.; Ding, Xuemei; Bai, Shiping; Zeng, Qiufeng; Su, Zuowei; Xuan, Yue; Zhang, K.Y.

doi:10.1016/j.livsci.2018.06.007

Cited by 16 publications

(19 citation statements)

References 39 publications

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“…Factors that affected the nutrient value of RSM contained Gls, EA, sinapine, phytic acid, tannins, dietary fiber, and electrolyte balance (Khajali and Slominski, 2012). Our results were consistent with the previous study showing that ADFI, egg production, egg weight, and egg mass of laying hens increased linearly with dietary RSM level (Leslie and Summers, 1972; Zhu et al, 2018). Diet palatability could be adversely affected by RSM due to the bitter taste of the Gls metabolites (Fenwick et al, 2010), and the high crude fiber content of REC used in this study could decrease feed intake by increasing satiety (Razdan et al, 1997).…”

Section: Discussionsupporting

confidence: 93%

“…Supplementation of REC had no effect on eggshell strength and eggshell thickness compared with the control group during wk1 to wk8, which was in agreement with previous studies, which reported 15% RSM or 29.4% RSM had no effect on eggshell strength and thickness (Riyazi et al, 2009; Zhu et al, 2018). Supplementation of REC decreased albumen height and Haugh units, which was in line with the previous study, which reported that RSM linearly decreased albumen height and Haugh units (Zhu et al, 2018). Similarly, Thomas et al (1978) reported that 10% RSM had a high Gls had a lower Haugh unit than feeding 15% RSM with low Gls.…”

Section: Discussionsupporting

confidence: 90%

“…High dietary fiber, tannins, and phytic acid content in RSM could also reduce nutrient digestibility due to its physiochemical properties that limit nutrient breakdown (Thacker and Petri, 2011). Supplementation of REC did not affect apparent nutrient digestibility in the present study; however, 17.64% RSM decreased nutrient digestibility in our previous study (Zhu et al, 2018). This difference may be explained by lower inclusion in the present study.…”

Section: Discussioncontrasting

confidence: 67%

“…Heat-processing the rapeseed could not only reduce glucosinolates ( Gls ) content, but also inactivate myrosinase activity, which could hydrolyze Gls to toxic metabolites containing OZT, ITC, and nitriles (Huang et al, 1995), whereas heat-pressing could decrease the amino acid content or availability of amino acids like Lys and Thr, which play key roles in biological reactions (Huang et al, 1995; Liu et al, 2019). Rapeseed has lots of antinutritional factors, including Gls, erucic acid ( EA ), tannins, phytic acid, or certain fiber components, which could limit the use of RSM or cake (Zhu et al, 2018). Biologically inactive Gls and EA are the 2 main antinutritional factors in RSM, and adverse effects of Gls metabolites containing thiocyanate ions (SCN − ) and 5-vinyl-1,3-oxazolidine-2-thione (5-VOT) are thought to be goitrogenic (Tripathi and Mishra, 2007), hepatotoxic, or nephrotoxic (Choi et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

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The effects of varieties and levels of rapeseed expeller cake on egg production performance, egg quality, nutrient digestibility, and duodenum morphology in laying hens

et al. 2019

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The objective of this study was to evaluate the effects of rapeseed expeller cake (REC) derived from Brassica napus rapeseed with different concentrations of glucosinolate (Gls) and erucic acid (EA) on the egg-production performance, egg quality, apparent nutrient digestibility, and intestinal morphology in laying hens. At 33 wk of age, a total of 1,080 laying hens were randomly divided into 9 treatment groups in a completely randomized design involving a control treatment without REC (a corn–soybean diet) and a 2 × 4 factorial arrangement with 2 concentrations of REC (at 7 and 14%) from 4varieties of rapeseed varying in Gls and EA concentrations [DY6 REC: 22.67 μmol/g (Gls, relative to rapeseed meal), 0.7% (EA, relative to total fatty acids); MB1 REC: 43.23 μmol/g, 3.5%; DY5 REC: 74.66 μmol/g, 16.20%; XH3 REC: 132.83 μmol/g, 44.60%]. The trial lasted for 8 wk. Compared with the control group, REC addition decreased the ADFI, egg production, egg weight, and egg mass of laying hens during wk1 to wk4, wk5 to wk8, and wk1 to wk8 (P < 0.05), and REC did not affect FCR, mortality during wk1 to wk4, wk5 to wk8, and wk1 to wk8 (P > 0.05). The XH3 REC group had a trend to lower egg weight when compared with the DY6 REC group during wk1 to wk8 (P = 0.07).REC decreased AME and DM digestibility at wk8 (P < 0.01), and REC addition in diet did not affect apparent nitrogen digestibility (P = 0.6). REC decreased villi height (P < 0.01) and increased crypt depth (P < 0.01). The XH3 REC group had a lower crude fat digestibility than the DY6 REC group, and the crude fat digestibility of the DY5 and MB1 REC groups was lower than the XH3 REC group (P < 0.01). The DY6 REC group had a higher villi height than the DY5, MB1, and XH3 REC groups (P < 0.01). The XH3 REC group had a higher crypt depth than the DY6, DY5, and MB1 REC groups (P < 0.01). The DY6 REC group had a higher value of the ratio of villi height to crypt depth than the DY5 and MB1 REC groups, and the DY5 and MB1 REC groups had a higher value of the ratio of villi height to crypt depth than the XH3 REC group (P < 0.01).REC decreased albumen height and Haugh unit during wk1 to wk8 (P < 0.01 and P = 0.004), and increased yolk color during wk1 to wk8 (P < 0.01).The XH3, MB1, and DY5 REC groups had a lower albumen height than the DY6 REC group during wk1 to wk8 (P < 0.01), and the XH3 and DY5 REC groups had a lower Haugh unit than the DY6 REC group during wk1 to wk8 (P < 0.01). The DY6 REC group had the highest value of yolk color than other three varieties of REC (DY5, MB1, XH3) at wk6 and wk8 (P < 0.01 and P < 0.01). It can be concluded that the exposure of laying hens to REC with higher Gls and EA (DY5, MB1, XH3) led to a lower egg weight, nutrient digestibility, intestinal absorptive area, and egg internal quality than those with lower Gls and EA (DY6).

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 90%

Section: Discussioncontrasting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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The effects of varieties and levels of rapeseed expeller cake on egg production performance, egg quality, nutrient digestibility, and duodenum morphology in laying hens

et al. 2019

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“…Feeding a diet containing a high content of GSLs to calves resulted in a quadratically increased serum T 4 concentration, although T 3 concentration remained within the normal physiological range (79). Diets contained GSLs affect thyroid function in many animal species (56), including pigs (80), mares (81), turkeys (82), hens (83), and turbots (84), suggesting that effects of GSLs on thyroid function are not unique to ruminants, but universal in a wide range of animal species.…”

Section: Effects Of Secondary Metabolites In Brassica Forages On Triimentioning

confidence: 99%

Invited Review: Glucosinolates Might Result in Low Methane Emissions From Ruminants Fed Brassica Forages

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2020

Front. Vet. Sci.

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Methane is formed from the microbial degradation of feeds in the digestive tract in ruminants. Methane emissions from ruminants not only result in a loss of feed energy but also contribute to global warming. Previous studies showed that brassica forages, such as forage rape, lead to less methane emitted per unit of dry matter intake than grass-based forages. Differences in rumen pH are proposed to partly explain these low emissions. Rumen microbial community differences are also observed, but the causes of these are unknown, although altered digesta flow has been proposed. This paper proposes a new mechanism underlying the lower methane emissions from sheep fed brassica forages. It is reported that feeding brassica forages to sheep can increase the concentration of free triiodothyronine (FT 3) in serum, while the intramuscular injection of FT 3 into sheep can reduce the mean retention time of digesta in the rumen. The short retention time of digesta is associated with low methane production. Glucosinolates (GSLs) are chemical components widely present in plants of the genus Brassica. After ruminants consume brassica forages, GSLs are broken down in the rumen. We hypothesize that GSLs or their breakdown products are absorbed into the blood and then may stimulate the secretion of thyroid hormone FT 3 in ruminants, and the altered thyroid hormone concentration may change rumen physiology. As a consequence, the mean retention time of digesta in the rumen would be altered, resulting in a decrease in methane emissions. This hypothesis on mitigation mechanism is based on the manipulation of animal physiological parameters, which, if proven, will then support the expansion of this research area.

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Biorefineries in Germany

et al. 2020

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Effects of dietary rapeseed meal on laying performance, egg quality, apparent metabolic energy, and nutrient digestibility in laying hens

Cited by 16 publications

References 39 publications

The effects of varieties and levels of rapeseed expeller cake on egg production performance, egg quality, nutrient digestibility, and duodenum morphology in laying hens

The effects of varieties and levels of rapeseed expeller cake on egg production performance, egg quality, nutrient digestibility, and duodenum morphology in laying hens

Invited Review: Glucosinolates Might Result in Low Methane Emissions From Ruminants Fed Brassica Forages

Biorefineries in Germany

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