EFFECT OF D IETARY VITAMIN E L EVEL O N PERFORMANCE AND MEAT QUAL ITY OF L UXI Y ELLOW BROIL ERS

Transcription

1 15 4 Vol. 15,No. 4, AC TA ZOON U TR IM EN TA SIN ICA Dec : X (2003) E,,,,, (, ) : 270 ( ) 3, 18mg/ kg -, mg/ kg -, 6 10, ( P > 0. 05), ( P < 0. 05), E ;, E p H (48 ) (24 ),, ; -, g/ g, ( P < 0. 05), 50mg/ kg -, -, : E ; ; ; :S :A EFFECT OF D IETARY VITAMIN E L EVEL O N PERFORMANCE AND MEAT QUAL ITY OF L UXI Y ELLOW BROIL ERS L I Tong - shu, HAN Rui - l i, XING Yong - guo,sun Ye - l iang, WANG Bing - yan,cao Fei (Depart ment of Animal Science,Shandong Agricult ural U niversity, Taian ,China) ABSTRACT: 270 L uxi yellow broilers (Ana K Guangxi Yellow native stain) randomly divided into t hree group s, were fed on t hree diet s supplemented wit h - tocop herol acetate of 0, 50, 100mg/ kg respectively f rom 6 - week old to 10 - week old. The basal diet contains 18mg/, E (V E), : : O : (1949), ( ),,, kg - tocop herol acetate. The result s showed t hat t here was no significant difference in body weight and average daily gain among t he t hree diet s ( P > 0. 05), but t he rate of belly fat decreased significantly ( P < 0. 05),t he qualit y of carcass was im2 p roved in group and. The p H value (48h),t he color of meat (24h) were stabile and t he drop - loss of breast meat was lower in group and, and t he water - loss ratio of t high meat in guoup decreased and t he meat tenderness in group imp roved. The content s of - tocop herol in breast of t he 3 group s were 4. 43, , g/ g respectively, which showed t hat t he content s of - tocop herol in group and were higher t han group ( P < 0. 05). To imp rove meat qualit y, t he optimum supplementation of - tocop herol acetate for L uxi yellow broiler was 50mg/ kg in t he basal diet. Key words : vitamin E ; L uxi yellow broiler ; perfo r mance ; meat qualit y,, V E V E,

2 4 : E 45 (Marusich, 1975 ; Kennedy, 1992 ; Bartov,1992 ; Sheehy,1999 ;,1999 ;,2001), V E,,, (Morrissey, 1997 ;,1998 ;,1998,,1999) V E,,, V E, V E, V E ,,,, 30, 270 3, 3 5,35, 70, ,, 50mg/ kg 100mg/ kg - ( Roche ) - 18mg/ kg ( ), ,, ( ), (,1994), , p H (,1995) 5, ; p H , p H p H ; 2, (W1), 35kg, 5, (W2), ( %) = (W1 - W 2) / W %, 4 24h, (W 1) (W2), ( %) = (W 1 - W 2) / W % ; C - L M,, , 80 70, 1. 27cm, HPL C (,1998 ;,1997) 1 Table 1. B asal diet com position an d m ai n n ut rient levels Ingredient Content ( %) Corn Soybean meal Fish meal Soybean oil Bone meal Salt Premix * Nut rient levels M E (MJ / kg) CP Ca A P L ys Met Fat : 25g,, 5g, 0. 5 % 30ml 50 % KO H 10ml, 80 30, 3,, 100ml, 5ml, 0. 5ml - (Sigma ) : 996, * : Cu 8mg, Fe 80mg, Mn 100mg, Zn 50mg, Se 0. 15mg, VA 2500IU, VD3300IU, V K32. 0mg, VB 12. 0mg,VB 2 4mg,VB 63. 5mg,VB mg, 30mg, 12mg, 1. 0mg, 0. 15mg

3 nm, C18 150mm 4. 6mm, :, 90 : 10 (v/ v), 20 l, 0. 8ml/ min 1. 5 SPSS, Duncan ( ) , 70 ; ; % %, V E, ; ( P < 0. 05),, 50mg/ 2 Table 2. B ody w ei ght, average daily gai n an d sl aughter perf orm ance of t he Item 35 BW of 35 day - old (g) 70 BW of 70 day - old (g) Average daily gain (g) Treat ment 3 groups of broilers Group Group Group Significance Measurement of t he slaughter performance ( %) Semi - eviscerating rate Eviscerating rate and leg muscle rate Belly fat rate Dept h of skin fat (cm) b ab a X SD, ( P > 0. 05) ; ( P < 0. 05) ; 3 p H P < Table 3. T he p H v al ue of breast m uscle an d leg m uscle meas u red at dif f erent ti me of t he 3 groups of broilers Treat ment Measured time Location of muscle Group Group Group Significance 45min h 24h 48h a kg 100mg/ kg -,,, V E I, V E 2. 2 p H p H 3 3 p H, ; , ,, 24 p H, , , ;, p H p H, p H,, V E, p H, ,, , b b P < 0. 05

4 4 : E 47, ( P < 0. 05), V E p H ,, 2, 24, ( P < 0. 05) ;, ( P < 0. 05) ;,, ( P < 0. 05) ;,, ( P < 0. 05),, (100mg/ kg) V E,, 2. 4, - ( ) ( ) ( ) g/ g, ( P < 0. 05),, VE, V E Bartov (1992), V E 24mg/ kg, V E mg/ kg, 7 ; Shen (1992), V E mg/ kg V E 25mg/ kg 18mg/ kg -, 6 10, V E V E (2000), mg/ kg V E g/ kg, 5 8, V E,,,,,, 3. 2 VE, V E p H (48 ) (24 ), ( ) ; V E (100mg/ kg) V E, V E Marusich (1975) Sheehy (1991) Bartov (1992), V E Morrissey (1997), V E 4 Table 4. T he m uscle color, w ater loss ratio, shear v al ue, d rop loss of m uscle f rom t he 3 groups of broilers Treat ment Measured indices Location of muscle Group Group Group 2h Muscle color h a b b ( %) Water loss ratio ( %) b a ab b a a Drop loss ( %) Shear value (kg. f) b ab a

5 , V E (1998) (1999), V E,,, p H, -, - V E,,,, V E, Cheah (1995), V E Ca 2 +,, A 2, PSE Xiong Cantor (1993) (2000), p H,,, p H, V E, ( 48 ),,,25(5) :41-43 ;25(6) :41-43.,, V E, [ M ]. :,P ; p H, E, V E [J ].,18(2) :52-53., E [J ].,8 : [J ].,22(8) : V E Bartov I, Frigg M Effect of high concent rations of, dietary vitamin E during various age periods on per -, 2,,,,, V E 24,,, V E, 3. 4 VE, V E 18mg/ kg, 50mg/ kg 100mg/ kg -,, 50mg/ kg 68mg/ kg, [ M ]. :,P ,,, E [J ].,30(4) : ,, E [J ]., (6) : [ M ]. :,P ,, E [J ].,19(5) : E [J ].,3 : E ( ) ( ) [J ], formance,plasma vitamin E and meat stability of broiler chicks at 7 weeks of age [J ]. B ritish Poult ry S ci.,33 : Cheah K S, et al Effect of dietary supplementation of vitamin E on pig meat quality[j ]. Meat S cience,39 : Kenndy D G, et al Economic effect s of increased vi - tamin E supplementation of broiler diet s on commercial broiler p roduction[j ]. B ritish Poult ry S cience, 33 : ( 64 )

6 64 15,, (3-48),,, (3-53),,, (3-59),,, (4-19),, (4-23),,, (4-28),, (4-32) E,,, (4-36) A,,, (4-44),,, (4-49), (4-54),,, (4-59)! #,,, (1-53),,, (1-60),,, (1-42) ( 48 ) Marusich W L, et al Effect of supplemental vitamin E in cont rol of rancidity in poult ry meat [J ]. Poult ry S cience,54 : Morrissey P A,Brandon S,Buckley D J, et al Tissue content of - tocop herol and oxidative stability of br - oilers receiving dietary - tocop herol acetate supple - ment for various periods p re - slaughter [J ]. B ritish Poult ry S cience,38 : Sheehy P J A,Morrissey P A, Flynn A Influence of dietary alp ha - tocop herol on tocop herol concent rations in chick tissues[j ]. B ritish Poult ry S cience,32 : Shen Y, Engberg R, J akobsen K On t he requiremeat of vitamin E in fast and slow growing chickens expe - riment s wit h broiler and leghorn - t ype chickens[j ]. Jou rnal A ni m al Physiology, A ni m al N ut rition, 67 (3) : Xiong Y X, Cantor A H, et al Variations in muscle chemical composition, p H and p rotein ext ractability among eight different broiler crosses[j ]. Poult ry S ci - ence,72 : :28-180,,,,,, 16,, 24,,, ( ) : 17 : : : E Ennil com