Effect of dietary astaxanthin on egg production in laying hens

 Astaxanthin (astaxanthin), also known as astaxanthin, astaxanthin, is a keto-containing carotenoid with the chemical name 3,3'-dihydroxy-4,4'-diketo-β,β'-carotene, molecular formula C₄₀H₅₂O₄, relative molecular mass of 596.864]. ₅₂O₄, with a relative molecular mass of 596.864]. Astaxanthin has strong antioxidant properties, its antioxidant capacity is 550 times that of vitamin E, 200 times that of tea polyphenols, 60 times that of grape seed, 10 times that of β-carotene, and it is known as the "super antioxidant" [2], and it has good nutritional and health care effects. Astaxanthin not only has a strong antioxidant and enhance the body's immune physiological functions, but also has a brilliant red color and strong pigmentation ability [3]. It can be added to livestock and poultry rations to change the color of livestock and poultry products and enhance the immunity of animals [4].

 

Wang Tong [5] found that the addition of astaxanthin to laying hens' feed increased the nutritional value of eggs and deepened the color of egg yolks. Feng Chang [6] showed that astaxanthin can be a keto-containing carotenoid, with the chemical name of 3,3'-dihydroxy-4,4'-diketo-β,β'-carotene, molecular formula of C₄₀H₅₂O ₄, with a relative molecular mass of 596.864].

 

 

Astaxanthin has strong antioxidant properties, its antioxidant capacity is 550 times that of vitamin E, 200 times that of tea polyphenols, 60 times that of grapeseed, and 10 times that of β-carotene, which is known as "super antioxidant" [2], and it has good nutritional and health care effects. Astaxanthin not only has a strong antioxidant and enhance the body's immune physiological functions, but also has a brilliant red color and strong pigmentation ability [3]. Its addition to livestock and poultry feed can change the color of livestock and poultry products and enhance the immunity of animals [4]. Wang Tong [5] found that the addition of astaxanthin to the feed of laying hens can increase the nutritional value of eggs and deepen the color of egg yolks. Feng Chang [6] showed that astaxanthin can improve the immunity of broiler chickens. In recent years, the application of astaxanthin is more and more extensive, but the effect of adding astaxanthin to the diet on the egg production performance of laying hens has been reported less, this experiment adds a certain dose of astaxanthin to the diet of laying hens, aiming to study the effect of astaxanthin on the performance of laying hens, and to provide a reference for astaxanthin in the application of laying hens production.

 

1 Materials and Methods

1.1 Test animals

3,000 200-day-old Hyland Brown laying hens, provided by Xiangshun Chicken Farm, Wuqing District, Tianjin.

 

1.2 Test materials

The quality fraction of astaxanthin used in the experiment was 10%, vacuum-packed and purchased from Guangzhou Juyuan Company.

 

1 . 3 Basis Diet and Nutritional Levels

The basal diets and nutrient levels are shown in Table 1.

 

 1 . 5 Feeding management

Adoption of ladder cage culture, 4 chickens per cage; feeding 3 times a day: 7:00, 11:00 and 16:00; free feeding and watering; combination of natural light and artificial light; combination of natural ventilation and longitudinal negative-pressure ventilation; automatic manure removal; routine immunization program; egg collection at 16:00 every day.

 

1 . 6 Methods of statistical analysis

SPSS1 7 . 0 software for statistical analysis and comparison, Dun- can's multiple comparisons, and P < 0.05 (significant difference) as the criterion for judging the significance of differences. The significance of the differences was judged by P < 0.05 (significant difference), and the results were expressed as "mean ± standard deviation".

 

2 Results and analysis

2 . 1 Effects of astaxanthin on laying performance of laying hens

The effects of astaxanthin on laying performance of laying hens are shown in Table 2. Table 2 Effects of astaxanthin on laying performance of laying hens.

groups	sample size	Total number of eggs laid/eggs	Eggs per day - d- 1
Pre-control (1 ~ 17 d)	1 500	22 988	1 352 . 24
Pre-test group (1 ~ 17 d)	1 500	23 5 32	1 384 . 24
Control group mid-term (1 8 ~ 34 d)	1 500	22 981	1 35 1 . 82
Mid-term experimental group (1 8 ~ 34 d)	1 500	23 5 5 3	1 385 . 47
Late control group (35 ~ 5 1 d)	1 500	22 989	1 352 . 29
Late experimental group (35 ~ 5 1 d)	1 500	23 5 37	1 384 . 5 3
Control group (1 ~ 5 1 d)	1 500	68 958	1 352 . 1 2
Test group (1 ~ 5 1 d)	1 500	70 622	1 384 . 75

 

As shown in Table 2, the total number of eggs laid in 1 ~ 17 d, 18 ~ 34 d, 35 ~ 51 d and 1 ~ 51 d in the test group was higher than that of the corresponding control group by 544, 572, 548 and 1,664 eggs, and the number of eggs laid per day was higher than that of the corresponding control group by 32.00 and 33.00 respectively. 00 、33 . 32.00, 33.65, 32.24 and 32.00 eggs per day, respectively. 32.00, 33.65, 32.24 and 32.63 eggs per day, respectively. The daily egg production was 32.00, 33.65, 32.24 and 32.63 eggs per day respectively, indicating that the egg laying performance of hens in the test group was higher than that of the control group at all stages of egg production. The total number of eggs laid in the test group in 1~17 d, 18~34 d and 35~51 d was 23,532, 23,553 and 23,537 respectively, and the daily egg production was 1,384.24, 1,385.24, 1,385.24 and 1,537 respectively. The daily egg production was 1,384.24, 1,385.47, and 1,384.3. The daily egg production was 1,384.24, 1,385.47 and 1,384.53 eggs. The daily egg production numbers were 1,384.24, 1,385.47 and 1,384.53 respectively, indicating that the egg laying performance of laying hens in the test group was basically the same at all stages.

 

2 . 2 Statistical analysis of test results

The statistical analysis of the test results is shown in Table 3.

Table3     Results of statistical analysis of test results

groups	Egg production rate/%
	(1 ~ 17 d)	(1 8 ~ 34 d)	(35 ~ 5 1 d)	(1 ~ 5 1 d)
control subjects	90 . 1 5±0 . 37 a	90 . 1 2±0 . 26 a	90 . 1 5±0 . 34 a	90 . 14±0 . 33 a
test group	92 . 28±0 . 27b	92 . 3 6±0 . 46 b	92 . 30±0 . 24b	92 . 32±0 . 33 b

 

Note: The data in the same column of the same peer with the same letter indicates that the difference is not significant (P>0.05), and different letters indicate that the difference is significant (P<0.05). 05), and different letters indicate significant differences (P<0.05). (P<0.05).

2 . 3 1 %, 2 . 49%, 2 . 2 . 38% and 2 . 42%, respectively. 42%, and the differences between the test groups and the control group were all significant (P < 0.05). (P < 0.05). The egg production rates of 1~17 d, 18~34 d, 35~51 d and 1~51 d in the test group were 92.28%, 92.28%, 92.28%, 92.28%, 92.28% and 92.28%, respectively. 28%, 92 . 36%, 92 . 30% and 92 . 32%, and the comparative analyses between the stages were not significant (P >0.05), suggesting that astaxanthin could be used to enhance egg production. 05), suggesting that the use of astaxanthin has a rapid and stable effect.

 

3 Discussion

In conclusion, compared with the basal diet, the addition of astaxanthin to the diet can significantly increase the egg production rate of laying hens, and the effect is fast and stable. However, this experiment is based on the addition of astaxanthin in the diet of 1/10,000, about the optimal amount of astaxanthin and the effect of changes in the amount of astaxanthin on egg production need to be further experimental research. With the wide application of astaxanthin, the residue problem of astaxanthin in livestock and poultry products as well as the safety problem caused by long time use need to be explored and studied in depth.

 

References.

[1] CHEN Xiaolin ,KAP Xia ,ZHONG Zhimei ,et al. Prospects of astaxanthin application[J] . Marine Science ,2 0 0 8 ,3 2(5) :8 7-8 9 .

[2] FU Xingzhou, LU Zhifang, LI Dong. Biological functions of astaxanthin and its application in poultry production[J] . North China Pasture Industry ,2 0 1 6(6) :2 6-2 7 .

[3] WANG Hongtao . Properties and development of astaxanthin[J] . Grain and Fats ,2 0 0 6(1 1) :40-4 3 .

[4] SONG Guangquan, YAN Jie, WANG Ronghui, et al. Extraction and purification of natural astaxanthin and its application [J]. Guangdong Chemical Industry ,2 0 0 7 ,3 4(17) :6 3-6 6 .

[5] WANG Tong . Research on vitamin D3, astaxanthin and tocotrienols to improve the nutrient composition of eggs[J] . China Poultry ,2 0 12 ,3 4(13) :40-41 .

[6] Feng Chang . Effects of astaxanthin on blood physical and chemical indexes and immune function of AA broilers[D] . Changsha:Hunan Agricultural University ,2 0 1 0