[Objective]In order to research on effect of different content of cottonseed meals on production performance and egg quality of Hisex laying hens. [Methods]120 Hisex laying hens of 37 weeks old are chosen,randomly div...[Objective]In order to research on effect of different content of cottonseed meals on production performance and egg quality of Hisex laying hens. [Methods]120 Hisex laying hens of 37 weeks old are chosen,randomly divided into four groups and three repetitions are set in each group,there are 10 hens in each repetition. Group I is the control group,II,III and IV are experimental groups. Cottonseed meal contents are respectively 5%,10% and 15%,with test cycle of 10 weeks,effects of different cottonseed meal dosages on Hisex laying hens production performance and egg quality are observed. [Results]When the diet is added with 5% to 15% of cottonseed meal,the average laying rate,average egg weight and feed-gain ratio all show downward trends when compared with that of the control group,but with no significant difference（ P 〉 0. 05）; eggshell strength,eggshell thickness,Haugh unit,egg shape index all show no significant difference（ P 〉0. 05）,with the increasement of cottonseed meal,the color of egg yolk got brighter,egg yolk color of 15% added group increased by 12%,show a significant difference with that of control group（ P 〈0. 05）. [Conclusion]When the feed was added with 15% cottonseed meals,it has an unconspicuous effect on laying performance and egg quality of Hisex laying hens,but whether it had an effect on animal health and food safety or not,a further systematic research is needed.展开更多
To improve egg production performance of local chicken breed in Guizhou Province, Libo Yaoshan chicken, with dopamine receptor 2 （ DRD2 ） as one of the candidate genes, we detected its genetic variation in 196 Libe ...To improve egg production performance of local chicken breed in Guizhou Province, Libo Yaoshan chicken, with dopamine receptor 2 （ DRD2 ） as one of the candidate genes, we detected its genetic variation in 196 Libe Yaoshan hens using PCR-SSCP （single-strand conformation polymorphism） and sequencing method, and analyzed the correlation between genetic variation and egg production traits. The results showed that TT and TG genotypes in mRNA SNlX）62 （C→T） loci of the DRD2 gene had extremely significant difference in egg production at 38 weeks age （P 〈0.01 ）, and significant difference in egg weight at 300 days age （P 〈0.05 ）. The single nucleotide polymorphisms （SNPs） mutation induced synonymous mutation of the 312th amino acids （leucine） in DRD2 protein, from L （CTG） to L （TI＇G）. The mRNA SNP962 （C→T） loci had a larger genetic effect on egg production at 38 weeks age, and could be used as a molecular marker in early breeding of Libo Yaoshan chicken.展开更多
The phenc, lic compounds found in mango fruit are antioxidants, and contribute to a reduction in the risk of cardiovascular diseases. Mango carotenoids are synthesized in mango fruit during ripening. A major by-produc...The phenc, lic compounds found in mango fruit are antioxidants, and contribute to a reduction in the risk of cardiovascular diseases. Mango carotenoids are synthesized in mango fruit during ripening. A major by-product of mango fruit is the skin, which is available after the fruits is consumed or used, particularly in the preparation of jams and fruit juices by the fruit canning industry. The objective of this study was to investigate the effects of dietary mango skin （MS） or mango skin combined with paprika extracts （PE） on production performance, egg quality, and egg yolk polyphenols. Total of 60 44-week-old Boris Brown hens was assigned, based on egg production rate and body weight, to 6 groups （10 birds in each group）. The laying hens were fed a basal diet （control group, 18 CP, 2,800 kcal/kg ME）, a basal diet supplemented with 0.1% PE, 1% or 5% MS, or with a mixture of 0.1% PE with 1% or 5% MS respectively. During the three-week experimental feeding period, the birds had free access to feed and water. Feed consumption was measured weekly and egg production was recorded daily. The results for initial body weight, feed consumption, hen-day production, egg mass, mortality, and final body weight did not indicate any effects of the different treatments （P 〉 0.05）. There were no significant differences （P 〉 0.05） in shell-breaking strength, shell thickness, shell ratio, yolk ratio or Haugh units, except in the case of egg yolk color. Roche yolk color fan scores were better in all experimental groups than in the control （P 〈 0.0001）. The yolk color, yellow index, and ratio of redness to yellowness were greater （P 〈 0.0001） in the 0.1% PE, the 0.1% PE ＋ 1% MS, and the 0.1% PE ＋ 5% MS group than in the 1%, 5% MS, and control groups. Compared with the control, lightness was decreased significantly in the 0.1% PE, the 0.1% PE ＋ 1% MS, and the 0.1% PE ＋ 5% MS groups （P 〈 0.05）, whereas redness was increased significantly in the 0.1% PE, 0.1% PE ＋ 1% MS, and 0.1% PE ＋ 5% MS groups （P 〈 0.0001）. No significant differences among the treatments were observed in either yellowness or egg yolk polyphenols. The results of the present experiment indicate that dietary mango skin or mango skin combined with paprika extracts did not show adverse effects on production performance, egg quality or egg yolk polyphenols. Moreover, supplementation with only mango skin did not enhance egg yolk color.展开更多
This study was to evaluate the effects of rapeseed (Brassica napus L.) from China with different content of glucosinolate (Gls) and erucic acid (EA) on laying hens.A total of 600 laying hens at 33 wk of age were rando...This study was to evaluate the effects of rapeseed (Brassica napus L.) from China with different content of glucosinolate (Gls) and erucic acid (EA) on laying hens.A total of 600 laying hens at 33 wk of age were randomly divided into 5 treatments containing a control diet and 4 diets with 11.5% rapeseed.The 11.5% rapeseed diets varied in Gls and EA levels:1) Deyou no.6 (DY6) with Gls at 22.67μmol/g and EA at 0.7%,2) Mianbangyou no.1 (MB1) with Gls at 43.23μmol/g and EA at 3.5%,3) Deyou no.5 (DY5) with Gls at 74.66μmol/g and EA at 16.20%,4) Xiheyou no.3 (XH3) with Gls at 132.83μmol/g and EA at 44.60%.Each group had eight replicates and each replicate had 15 hens.The trial lasted for 12 wk with 4 wk withdrawal.From 1 to 8 wk of the trial,11.5% rapeseed reduced average daily feed intake (ADFI) compared to the control group (P=0.002),and egg-laying rate of XH3 rapeseed was lower than that of DY6 rapeseed(P=0.006),and egg weight of MB1,DY5,and XH3 rapeseed were lower than that of the control group(P=0.007).Egg mass was reduced by 11.5%rapeseed and egg mass of XH3 and DY5 rapeseed were lower than that of DY6 rapeseed (P=0.004).Feed conversion ratio (FCR) of 11.5% rapeseed was higher than that the control group and FCR was higher in XH3 rapeseed than in DY6 rapeseed from 1 to 8 wk (P=0.008).At wk 8,the lightness value of eggshell color of XH3 rapeseed was significantly lower than that of the control and DY5 rapeseed (P=0.012).Xiheyou no.3 rapeseed had a higher redness value of eggshell color than the control and MB1 and DY5 rapeseed (P=0.008).Albumen height of DY5 rapeseed was lower than that of the control group at wk 8 (P=0.012).Mianbangyou no.1 and DY5 rapeseed decreased Haugh unit at wk 4 and 8,respectively (P=0.011,P=0.024).Serum estradiol (E2) content was decreased by 11.5% rapeseed (P=0.003).Thyroid index increased as the Gls and EA content increased (P=0.008).The smallest hierarchical follicle numbers of XH3 and MB1 rapeseed were lower than that of the control group (P=0.009).After 4 wk withdrawal,the egg weight,egg mass,and FCR did not recover (P=0.011,P=0.033,P=0.024,respectively).In conclusion,11.5% rapeseed decreased egg production performance which might be caused by decreasing hormone levels,and high Gls and EA rapeseed had a lower performance than low Gls and EA rapeseed.展开更多
基金Supported by Modern Agricultural Industry Technology System Construction Special Fund(nycytx-41-2B)Social Development Project of Yangzhou(yz2010080)
文摘[Objective]In order to research on effect of different content of cottonseed meals on production performance and egg quality of Hisex laying hens. [Methods]120 Hisex laying hens of 37 weeks old are chosen,randomly divided into four groups and three repetitions are set in each group,there are 10 hens in each repetition. Group I is the control group,II,III and IV are experimental groups. Cottonseed meal contents are respectively 5%,10% and 15%,with test cycle of 10 weeks,effects of different cottonseed meal dosages on Hisex laying hens production performance and egg quality are observed. [Results]When the diet is added with 5% to 15% of cottonseed meal,the average laying rate,average egg weight and feed-gain ratio all show downward trends when compared with that of the control group,but with no significant difference（ P 〉 0. 05）; eggshell strength,eggshell thickness,Haugh unit,egg shape index all show no significant difference（ P 〉0. 05）,with the increasement of cottonseed meal,the color of egg yolk got brighter,egg yolk color of 15% added group increased by 12%,show a significant difference with that of control group（ P 〈0. 05）. [Conclusion]When the feed was added with 15% cottonseed meals,it has an unconspicuous effect on laying performance and egg quality of Hisex laying hens,but whether it had an effect on animal health and food safety or not,a further systematic research is needed.
基金Supported by Breeding and Demonstration Promotion of New Yaoshan Chicken Strains(QNYZ[2014]008)Key Gene Screening of Broodiness Breeding of Yaoshan Chicken(QKHJ[2014]2012)Doctoral Starting up Foundation of Guizhou Institute of Animal Husbandry and Veterinary in 2014:STAT5Gene Mutation Detection of Yaoshan Chicken and Associated Analysis with Egg Production Traits&CDS Region’s Cloning and Differential Expression of ONECUT1 Gene in Yaoshan Chicken and Associated Analysis with Production Traits(QKH LH[2015]7067)
文摘To improve egg production performance of local chicken breed in Guizhou Province, Libo Yaoshan chicken, with dopamine receptor 2 （ DRD2 ） as one of the candidate genes, we detected its genetic variation in 196 Libe Yaoshan hens using PCR-SSCP （single-strand conformation polymorphism） and sequencing method, and analyzed the correlation between genetic variation and egg production traits. The results showed that TT and TG genotypes in mRNA SNlX）62 （C→T） loci of the DRD2 gene had extremely significant difference in egg production at 38 weeks age （P 〈0.01 ）, and significant difference in egg weight at 300 days age （P 〈0.05 ）. The single nucleotide polymorphisms （SNPs） mutation induced synonymous mutation of the 312th amino acids （leucine） in DRD2 protein, from L （CTG） to L （TI＇G）. The mRNA SNP962 （C→T） loci had a larger genetic effect on egg production at 38 weeks age, and could be used as a molecular marker in early breeding of Libo Yaoshan chicken.
文摘The phenc, lic compounds found in mango fruit are antioxidants, and contribute to a reduction in the risk of cardiovascular diseases. Mango carotenoids are synthesized in mango fruit during ripening. A major by-product of mango fruit is the skin, which is available after the fruits is consumed or used, particularly in the preparation of jams and fruit juices by the fruit canning industry. The objective of this study was to investigate the effects of dietary mango skin （MS） or mango skin combined with paprika extracts （PE） on production performance, egg quality, and egg yolk polyphenols. Total of 60 44-week-old Boris Brown hens was assigned, based on egg production rate and body weight, to 6 groups （10 birds in each group）. The laying hens were fed a basal diet （control group, 18 CP, 2,800 kcal/kg ME）, a basal diet supplemented with 0.1% PE, 1% or 5% MS, or with a mixture of 0.1% PE with 1% or 5% MS respectively. During the three-week experimental feeding period, the birds had free access to feed and water. Feed consumption was measured weekly and egg production was recorded daily. The results for initial body weight, feed consumption, hen-day production, egg mass, mortality, and final body weight did not indicate any effects of the different treatments （P 〉 0.05）. There were no significant differences （P 〉 0.05） in shell-breaking strength, shell thickness, shell ratio, yolk ratio or Haugh units, except in the case of egg yolk color. Roche yolk color fan scores were better in all experimental groups than in the control （P 〈 0.0001）. The yolk color, yellow index, and ratio of redness to yellowness were greater （P 〈 0.0001） in the 0.1% PE, the 0.1% PE ＋ 1% MS, and the 0.1% PE ＋ 5% MS group than in the 1%, 5% MS, and control groups. Compared with the control, lightness was decreased significantly in the 0.1% PE, the 0.1% PE ＋ 1% MS, and the 0.1% PE ＋ 5% MS groups （P 〈 0.05）, whereas redness was increased significantly in the 0.1% PE, 0.1% PE ＋ 1% MS, and 0.1% PE ＋ 5% MS groups （P 〈 0.0001）. No significant differences among the treatments were observed in either yellowness or egg yolk polyphenols. The results of the present experiment indicate that dietary mango skin or mango skin combined with paprika extracts did not show adverse effects on production performance, egg quality or egg yolk polyphenols. Moreover, supplementation with only mango skin did not enhance egg yolk color.
基金supported by National Science and Technology Project(2014BAD13B04)the earmarked fund for Modern Agro-Industry Technology Research System and Sichuan Provincial Science and Technology Project(2014NZ0043,2014NZ0002).
文摘This study was to evaluate the effects of rapeseed (Brassica napus L.) from China with different content of glucosinolate (Gls) and erucic acid (EA) on laying hens.A total of 600 laying hens at 33 wk of age were randomly divided into 5 treatments containing a control diet and 4 diets with 11.5% rapeseed.The 11.5% rapeseed diets varied in Gls and EA levels:1) Deyou no.6 (DY6) with Gls at 22.67μmol/g and EA at 0.7%,2) Mianbangyou no.1 (MB1) with Gls at 43.23μmol/g and EA at 3.5%,3) Deyou no.5 (DY5) with Gls at 74.66μmol/g and EA at 16.20%,4) Xiheyou no.3 (XH3) with Gls at 132.83μmol/g and EA at 44.60%.Each group had eight replicates and each replicate had 15 hens.The trial lasted for 12 wk with 4 wk withdrawal.From 1 to 8 wk of the trial,11.5% rapeseed reduced average daily feed intake (ADFI) compared to the control group (P=0.002),and egg-laying rate of XH3 rapeseed was lower than that of DY6 rapeseed(P=0.006),and egg weight of MB1,DY5,and XH3 rapeseed were lower than that of the control group(P=0.007).Egg mass was reduced by 11.5%rapeseed and egg mass of XH3 and DY5 rapeseed were lower than that of DY6 rapeseed (P=0.004).Feed conversion ratio (FCR) of 11.5% rapeseed was higher than that the control group and FCR was higher in XH3 rapeseed than in DY6 rapeseed from 1 to 8 wk (P=0.008).At wk 8,the lightness value of eggshell color of XH3 rapeseed was significantly lower than that of the control and DY5 rapeseed (P=0.012).Xiheyou no.3 rapeseed had a higher redness value of eggshell color than the control and MB1 and DY5 rapeseed (P=0.008).Albumen height of DY5 rapeseed was lower than that of the control group at wk 8 (P=0.012).Mianbangyou no.1 and DY5 rapeseed decreased Haugh unit at wk 4 and 8,respectively (P=0.011,P=0.024).Serum estradiol (E2) content was decreased by 11.5% rapeseed (P=0.003).Thyroid index increased as the Gls and EA content increased (P=0.008).The smallest hierarchical follicle numbers of XH3 and MB1 rapeseed were lower than that of the control group (P=0.009).After 4 wk withdrawal,the egg weight,egg mass,and FCR did not recover (P=0.011,P=0.033,P=0.024,respectively).In conclusion,11.5% rapeseed decreased egg production performance which might be caused by decreasing hormone levels,and high Gls and EA rapeseed had a lower performance than low Gls and EA rapeseed.
