^ AIXIH HUOIXIG CLIA CAC IVHiC B A 5AIXI LEIXI MEIXI TROIXIG K H A U P H A I X I AIXI DEIXI HIEU Q U A SIIXIH TRUOIXIG,
IXlAlXIG S U A T V A C H A T LUOIXIG THfT C U A G A R l
T r i n T h i T h u HdngS H o i n g Qudc Hiing^, Lg V i n An', Hidenori Harada^
S
T6MTAT
y Nghifin cuu anh hudng ciia cac mtic ba sfin len men trong khau phan an den hieu qua sinh trudng, nang suat . va chat lupng thit da duoc tien banh tr&n 240 con ga Ri liic 4 tuan tuoi, duoc bd tri theo phuong phap phan 16
' hoan toan nglu nhien vao 4 nghigm thiic, mdi nghigm thiic gdm co 60 con, duoc lap lai 3 Un (20 con/6 chuong/lan lap lai, trong d6 co 13 mai va 7 trong). Khau phin thi nghigm gdm c6: DC (ddi chttng, thiic an hdn ., hpp CO cam dam dac, ng6, cam gao), BSLMIO (tinic an hdn hpp c6 cam dam dac, ngC, cam gao + 10% ba sin l^n men), BSLM20 (Ihiic an h6n hpp co cam dam d§c, ngo, cam g^o + 20% ba sfin l€n men), BSLM30 (thiic an hdn hpp c6 c ^ dam dac, ngo, cam gao + 30% ba sin l^n men). Kgt qua cho thay khau phan &n co chiia cac , ,j miic khac nhau cia ba sfin len men da kh6ng Iam anh huong dgn khdi lupng co the, tdc dp sinh tmdng tuyet , ddi ciia g i Ri khi so sanh voi khdu phan DC. Luong an vao la thap nhat d g i Ri an khdu phan DC va khau phan
^ BSLMIO. He sd chuyen boa ihiic an (HSCHT^ va chi phi thuc an/kg tSng trpng la kh6ng khac nhau giua cac
* khau phin flii nghiem (P>0,05). Co th^ tiiay tiig 30% BSLM trong khau phan an ciia ga Ri mi kh6ng anh huong ddn nang suit, chat luong vi thanh thanh phfin hoa hoc cila thit ga Ri.
jslmui Tiikhda: GaRi, ba sin len men, nang sudt, chdt liwng tiiit p(
lorir
1 OATVJINK Ejukonemu, 2004). Dac bigt, khi s u dung hdn h p p 6 Vigt Nam, s i n duoc x e m n h u I i cay luong tiiuc n h i ^ " ^i sinfa v i i v i tiidi gian Ien men khae nhau eiing quan trpng sau lua v i s i n tiiudng dupc ti-dng phd bidn ^ hudng ddn h i m luong protein cua b a san (Aro et d viing ddi nui. Tnrdc d i y , s i n thudng duoc su- dung ^- 2008).
, lam thuc an cfao gia siie, faign nay ihi lai dupc sir dung Mdt sd t i c gia da nghidn cuu s u dung b a s i n lgn lam nguyen ligu chd bidn tinh b d i s i n . Trong q u i trinh men trong k h i u p h i n an cho g i vdi ^ Ig 10-16% da chg bign tinh b d i s i n , chl ihu dupc khoang m d i phan khdng I i m anh hudng ddn sinh trudng c u a g i ba l i tinfa bpt, cdn lai k h o a n g hai pfaan ba la pfau pfaam (Kompiang etal., 1995; Nur, 1995).
ba s i n dupc tiiii ra, d i y I i nguyen n h i n chmh g i y ndn ^ u a t p h i i tir nhfimg 1^ d o h d n , chung tdi tien d nhi^m mdi tiirdng (Nguyen Huu Van va cdng su, ^^^ ^ nghigm "Anh huong cua cac mdc ba sin 2008). Jen men tiong khiu phan an din hieu qui sinh
Ba s i n cd h i m lupng protein tiiip (3,5% tiieo trudng, nang sudt vi chdt luong tiut cua gaRT VCK) v i h a m Iupng x a N D F cao (60,1% tiieo VCK) v i 2. y^j U& VA PHUONG PHAP NGHIHII CUU cd ehua chat k h i n g dinh duong n h u HCN, taiun
(Hong & Ca. 2013). Phuong p h i p len men phu p h i m 2.1. Dgng v $ t v i t i i i g t kg flii nghigm nhd vi sinh v i t dd I i m t i n g g i i tri dinh duong, g i i m Tdng sd 240 con g a Ri 28 n g i y iudi d a dupc sii dpc td v i t i n g tfadi gian b i o quan n h u l i mdt giii p h i p diing trong thi nghigm nay. G i dirpc p h i n cfaia faoin Ai giai quygt c i c van dg ngu trgn. C i c vi sinh v i i t o i n n g i u nhifin v i o 4 kfaau phan thi nghiem, mdi thudng dupc s u dung d^ ldn m e n p h u pham l i kfaau phan cd 60 eon (20 c o n / 1 Ian l^p Iai, trong dd Saccharomycecerevisiae, Mucor sp., Rhizopus sp. cd 13 con g i mii, 7 eon g i ti-dng).
hoac Aspergillus niger (Aro et al., 2008), da l i m t i n g ^ ^ ^ ^ ^ ^^.. ^ .^ ^^^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ham lupng protein Mi 2,03 ddn 18,05% (Nwafor & h i n h flii nghigm cua Vign Nghign cim va Pfaat tri^n-
Dai hpc Ndng I i m Hu^. Thi nghigm dupc ihuc hign
• T trong 9 tuan.
' Tmdng D?i hpc N6ng Lam Hue . ' Phan vign Quy hoach va Thi^t ke nong nghiep mien Trung
* Tnrong Dai hpc Kyoto, Nhiil Ban
KHOA HOC CdNG NGHE 2 ^ . Thiic i n v i cich cho i n
2.2.1. Khau phan thingbiem
Ngudn tinic an dia phuong nhu ngd, cam gao v i cim dim die dupc su dung nhu khau phan ddi chling ff)C), 3 khau phan tiii nghigm cdn lai dupc thay the vdi cic iy Ig khie nhau tir 10, 20 v i 30% ba sin lgn men.
Khiu pfaan thi nghigm dugc md ia nhu sau:
Khau phan ddi chiing ff)C): gdm cd ngd, cim gao, cim dim dac.
Khau phin cd 10% ba sin ldn men
(BSLMIO): gdm cd ngd, cam gao, cam dam dac + 10% ba sin Ien men.
Khau phan cd 20% ba sin ldn men (BSLM20): gdm cd ngd, cim gao, cam dim dac + 20% b a s i n ldn men.
Khau phan cd 30% ba sin Ien meo (BSLM30): gdm cd ngd, cim gao, cim dim d§c + 30% ba sin len men.
Thanh phan ra gia tri dinh dudng ciia khiu [rfila tfai nghiem dupc trinh biy d bang 1.
BaiiK 1. Tliiiih pMn v i gli M dmh duSiiK cua khiu p h ^ thi n K l i i ^ te/kg VCK) 1 DC ] BSLMIO 1 BSLM20 | BSLM30 Nguyin liiu
Thuc an dam dac Ngo Cam gao Ba san l&n men Vitamin-Premix khoang Tong so
190 610 195 0
185 510 200 100
5 1 5
1000 i 1000185 415 195 200 5 1000
190 410 95 300 5 1000 Gia tri dinh dirong
CP Protein thuc Upit NDF Ca P
ME (kcal/kg VCK) Gia thiic an (VND)
151 126 46 142 22 7,8 2968 10990
162 140 43 188 26 8,8 2892 10380
156 126 40 204 23 8,2 2816 9830
150 117 29 224 23 6,8 2800 9340 2.2.2. Chudn binam men
Pichia kudriavzeu]k nam men ed kfai nang sinh enzym ngoai b i o cao nhu xenlulaza, proteaza v i amylaza da dupc phin lip tir dich nudc trai cay lgn men (Ket qui nghign cuu ciia de tii do quy NAFOSTED tii trp). Hoat dp eua enzym xenlulaza, proteaza va amylaza do nam men lochia kudriavzei sinh ra cd gii tii tiiong iing Ii 94,5, 3 3 vi 10,1 U/ml da dupc xac dinh theo phuong phip ciia Ghose (1987), Anson (1938) va Bemfeld (1955), tiiong iing.
Nam men Pichia kudriavzeti dupc bio quan d -70°C iai phdng thi nghigm cua Khoa Chan nudi Thii y va da dupc sir dung trong thi ngfaiem niy.
Bchiakudriavzeu 6a. dupc pfauc fadi v i nudi cay trong dung dich ed chiia 20% ri mat vi 4% ure va dupc ii b nhigi dp phdng.
2.2.3. Chuan bi ba sin lin men
Ba sin lgn men dupc chuan bi nhu sau: Ba sin dupc tiiu mua true tiep tir ea sd san xuat tinh bpt sin trgn dia bin thanfa pfad Hug. Ba sin sau dd dupc ri mdng trdn nen dd lam giim dp am. Sau dd ba sin dupc iron d^u vdi bdt sin vi li mat ifaeo ty Ig 85:105. , Rdi thgm vio 2 ml Pichiakudriavzen/ kg hdo hgp ihlic an v i 0,5% urg, iron deu vi eho vao bao ni long d^ d nhiet dp phdng. Sau 7 ngiy thtrc an ldn men, co miii thom thi lay cho ga an.
do.
G i dupc cho an 3 lin/ngiy, dupc udng nudc tu 2 3 . Ghi chep v i 1 ^ miu
G i dupc can h i n g tuan. Tfaiic an thua dupc tdD vio llic 8 gid sing cua ngay fadm sau, dupc ghi chip hang ngay va dupc su dung de tinh toin Iupng an vio c u a g i .
102 NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 11/2015 %^
Dn^i
^oa%
B i sin Ign men tai cic tiidi diem 0, 7.14, 21 va 28 ngiy dupc lay miu dg pfaan tich gii tri dinh duong.
Bi dinh gii nang suit v i ehii lupng tiiii ciia g i Ri khi su dung khau phin an cd cic miic ba sin ldn men Hiac nhau, vio trudc ngiy eudi cimg ciia tin nghigm tat ea g i deu duoc nhin ddi trudc kfai giet md 12 gid vi dupc cung e ^ nudc udng. Sing hdm sau can khdi hipng sdng va tien hinh mo khio sit tdng sd 16 con ga Ri dirpc bit ngiu nhien tii 4 khau phin ttii nghigm, mdi khiu phan thi nghigm cd 4 eon (2 mai, 2 trdng^ dd dinh gia nang suit va chat lupng ttiit
2.4. Cac ehi tigu theo ddi
Tien hanh iheo doi cic chi tidu v^ tang trpng, hipng an vio eua g i , hg sd chuyen hda tfauc an. chi phi ihlic an/kg iang ti-png v i cic chi tidu ve nang suit (ty lg thin thii, ty Ig Ifaii diu, ty le thit nguc), chat lupng tiiii (ty lg mat nudc sau 24 gid bio quan, ty Ig mat nudc sau 25 phut che bidn, miu sic tiiii) vi thanh phin fada fapc eiia thit Mau sic ciia ihii dupc do trdn may Chroma Meier CR400/410.
2.5. Phin tidi thinh phin hda hpc ciia thiic i n
isniiB'
• 5 : 1 :
M i u tinic a n e u a 4 k h a u p h a n thi ngfaigm d a d u p c l a y m i u d e p h i n tich e a e c h i tidu n h u v i t c h i i k h o (VCK), p r o t e i n tiid ( C P ) , x o k h d n g t a n t r o n g m d i t r u d n g t r u n g tinh ( N D F ) , k h o a n g tfao, C a t h e o p h u o n g p h i p c u a A O A C (1990). P r o t e i n i h u c cd t r o n g h d n h p p ttiuc a n c u a 4 k h a u p h a n a n thi n g h i g m d a d u o c p h i n ticfa i h e o p h u o n g p h i p c u a A O A C (1990) va Ucib-a e t al. (1996). H i m l u p n g P d u g c p h i n tich t r d n m i y q u a n g p h d h a p p h u (UV- visible s p e c t r o p h o i o m e l ^ r ) . Gia tri p H c u a b a s i n lgn m e n d u p c d o b i n g p H m e t e r ( H a c f a - U S ^ tai c i c tiidi d i e m k h i c n h a u 0 , 7 , 1 4 , 2 1 v i 2 8 n g i y .
2 . 6 . X u l ^ s d H g u
S d Ugu v e h i g u q u a sinh t r u d n g , n a n g s u i t v i c h a t l u p n g thit c u a g a Ri d u o c x u Iy v i p h i n tieh q u a c h u o n g t r i n h t u o n g q u a n iuydn t i n h G I M t r g n p h a n m e m M I N I T A B p h i g n b i n 13.2. So s a n h s u sai k h i c giira c i e k h a u p h i n thi n g h i g m b i n g p h u o n g p h i p T u k e y vdi k h o a n g tin c i y P<0,05.
S-KFTQUHVATTUOLIMN
3 . 1 . T h i n h p h i n h d a h p c v i g i i tr} d i n h duOng ciia b a s i n v i b a s i n lgn m e n
Gia tii d i n h d u o n g c u a b a s a n v a b a s i n ldn m e n d u p c t r i n h b a y d b i n g 2.
B a n g
B a s a n
B a s a n l e n m e n 0 n g a y B a s a n l e n m e n 7 n g a y B a s a n l€n m e n 14 n g a y B a s a n l e n m e n 2 1 n g a y B a s a n ten m e n 2 8 n g a y
2 . GM t i i d i n h duOns D M
( * D M ) 14,47 37,34 36,94 36,09 35,57 35,12
C P (%DM)
2,50 5,80 5,88 6,02 6,13 6.14
r ctia b a s ^ vsl b a s ^ l e n m e n P r o t e i n thirc
(W3M) 1,36 1,51 1,67 1,64 1,53 1,56
H C N ( m g / k g D M )
267,63 59,12 46,56 45,35 42,73 42,75
N D F ( * D M )
31,51 27,48 25,94 23,83 23,52 23,57
pH 3,99 3,53 3,40 3,43 3,46 3,42 v a t c h a t k h o (VCK) c u a b a s i i v a b a s a n l e n
m e n tai liic b a t d a u ( n g a y 0) la 14,47 v a 37,34%, t u o n g ling. Ly d o c o s u s a i k h a c n h a u r o r d t n a y la d o b a san d u o c lay t r u e t i e p tir c a s a s a n x u a t t i n h b o t c o h a m luijng n u o c r a t c a o , d o d o V C K c u a b a s a n r a t thSp. T r o n g k h i d d b a s i n t n r o c k h i len m e n ( n g a y 0) da d u a c p h o i c h o r a o n u o c d e l a m g i a m d a a m v a duoc t r p n voi c a c c h a t p h u g i a n h u b o t s a n , ri m j t . nen c o V C K c a o h o n .
H a m l u p n g p r o t e i n t h 6 (CP) c u a b a s a n va b a san ten m e n ( n g a y 0) la 2,50 va 5,80S6, t u o n g iing. C o sugia tang nhe ciiaCPvaprotein thuc ciiabasanten
men khi so sanh voi ba san khong ten men. Ham luong HCN CO trong ba san ten men da g i ^ dang k^
so vol ba san khong ten men. Cu th^, ham lupng HCN cua ba san thu tai ca so che bi^n tinh b6t san la 267,63 m g A g VCK, trong khi do ham luong HCN cua ba san ten men tai thcri di^m ngay 0, 7,14, 21 va 28 ngay la 59,12, 46,56, 45,35, 42,73 va 42,75 mg/kg VCK, tuong ling. Nghien ciiu cua Nguyen Huu Van va c6ng su (2008) cho Ihay ham luong HCN cua ba san thu tai nha may dnh bot san la 240 mg/kg VCK va ham lugrng HCN sau khi ti voi cic phu gia khac nhau da giam ro r«t, chi con 77-81 mg/kg VCK lai 21 ngayu.
lef
N 6 N G NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 11 /2015
KHOA HOC CdNG NGHi Ngoii ra, h i m Iupng xo kfadng tan irong moi
tiudng hung tinh (NDF) ciia ba sin Ien men 7,14,21 v i 28 ngiy giam ro rgt kfai so sinfa vdi faim lupng NDF cua ba sin khdng Ien men. Oboh va cdng su (2002), Oboh va Akindahunsi (2003), Boonnop va cdng su (2009) da thdng bao ring faim lupng HCN ciia vd sin Idn men vi cua cu sin ldn men deu rat thap khi so sanh vdi ham lupng HCN cua eu san kfadng lgn men. Hong vi Ca (2013) da tiidng bao kfai sir dung cic vi sinfa vit khie nhau de Ign men ba sin da eho ket qua giam faim lupng NDF dang ke so vdi ba sin khong Ien men. Dae bigt, thdi gian ldn men khac nhau ciing inh hudng ddn ham Iupng NDF cua ba sin len men (Hong & Ca, 2013). Trong mdi nghien eiiu khic ciia Boonnop vi cdng su (2009) thi lai kfadng thay cd su ihay ddi ve ham lupng NDF cua ba sin Ien men so vdi ba sin kfadng ldn men. Cd thd Bang 3. Anh hudng ciJa cic muc ba sin ldn
giai ihich do nim men sii dung trong ihi nghi$m niy ed kha nang sulfa enzym n g o ^ bio nhu xenlulaza, do dd cd the nhd su cd mat eua enzym niy trong mdi trudng da Iim giam ham lupng xo NDF khi so sinfa vdi ba sin khdng dupc len men voi l^chiakudriavzeh.
Gii tri pH cua ba sin len men da giam dang kl iheo thdi gian ldn men. Tai pH tiiap nay da tao di^
kign lie cfae cic vi sinfa vii cd faai phii trign frong khdi il v i do dd kdo dai thdi gian bao quan cua ba sdn Ien men.
3.2. Anh hudng ctia cic miic ba sin lgn men khic nhau ddn higu q u i sinh truong ciia g i Ri
Bang 3 va 4 trinh bay sd Ugu ve anh faudng ciia cic miic ba sin Ien men khac nhau den hieu qua sinh trudng cua ga Ri.
men dgn khdi lupng cua g i Ri fe/con/tuin) Trong luong ban dau
Sau 5 tuan Sau 6 tuan Sau 7 tuan Sau 8 tuan Sau 9 tuan Sau ID tuan Sau 11 tuan Sau 12 tuan Sau 13 tuan
DC 315 408 517 640 770 937 1097 1238 1365 1483
BSLMIO 315 406 500 622 748 892 1037 1168 1295 1425
BSLM20 312 388 527 668 792 947 1102 1237 1358 1488
BSLM30 316 392 518 660 770 910 1068 1195 1325 1442
SEM 7,62 5,83 11,90 15,04 27,82 37,19 38,49 38,97 36,55 36,25
P 0,975 0,091 0,499 0,203 0,733 0,721 0,630 0,546 0,536 0,559 g 4. Anh huong ciia cac miic ba san tec
Sau 5 tuan Sau 6 tuan Sau 7 tuan Sau 8 tuan Sau 9 tuan Sau 10 tuan Sau 11 tuan Sau 12 tuan Sau 13 tuan Ca giai doan
DC 13,38 15,48 17,62 18,57 23,81 22,86 20,14 18,10 16,90 18,55
men den toe BSLMIO
13,08 13,33 17,38 17,86 20,71 20,71 18,81 18,10 18,57 17,62
d$sinhlru6i BSLM20
10,96 19,76 20,24 17,62 22,14 22,14 19,29 17,38 18,47 18,68
og tuy^t doi cOa g^ Bi BSLM30
10,77 17,86 20,48 15,71 20,00 22,62 18,10 18,57 16,67 17,86
SEM 1,08 1,63 1,47 2,04 1,76 1,08 0,58 0,65 0,53 0,62
g/caa/w P 0,266 0,100 0,353 0,786 0,478 0,517 0,146 0,652 0,059 0,591 Khdng cd su khic nhau ve khdi lupng co the, tdc
dd sinh irudng tuygt ddi ciia g i Ri khi an khau phin DC vi khau phan cd chiia cic miic khae ba sin Ign men kfaac nfaau (P>0,05) (Bing 3 v i 4). Khdi Iupng CO the cua g i Ri iai Iiic bat dau tiu nghigm ciia khau phin DC, BSLMIO, BSLM20 vi BSLM30 lan lupt l i
315, 315, 312 va 316 g/con. Tgi tiidi didm cudi ciia gia doan thi nghigm, khdi lupng eo tfa^ aia g i Ri li 1483, 1425,1488 va 1442 g/con, tiiong iing (bang 3). Tdc dO sinh irudng cua g i Ri dat cao nhat vao iuin tudi tiiii W va ed Idiuynh hudng giim tir tuan tudi thii 11 d^n tiian tudi tfali 13 d tai ca cac khiu phin ihi nghigm (bang 4).
104 NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 11/2015
Bang 5 trinh bay sd ligu ve inh hudng ciia cic miic ba sin Ign men khic nhau dgn luong an vio cua giRi.
Cd su khac nhau ro rgt vd lupng an vio cua g i Ri giiia 4 khau phin thi nghigm (P<0,05). Trong giai
doan nudi tir 5 iuin iudi dgn 13 tuan iudi, lupng an vao thap nhai d g i Ri i n khau phan DC kfai so sinh vdi g i Ri an khau phan ihi nghigm BSLM20 va BSLM30 (P<0,05).
Bang 5. Anh hudng ciia die miic ba s ^ ]&a men Sau 5 tuan
Sau 6 tuan Sau 7 tuan Sau 8 tuan Sau 9 tuan Sau 10 tuan Sau 11 tuan Sau 12 tuan Sau 13 tuan Ca giai doan
DC 39,33 53,54"
72,47 79,35»
86,63' 90,93- 89,07"
90,46"
89,44"
76,78"
BSLMIO 39,33 58,02"''
76,36 72,75"
91,67""
96,82' 78,28' 75,73' 74,99' 73,77'
d ^ luong an v ^ dia ga Ri (g/con BSLM20
39,08 62,33''
76,26 79,70"
93,38' 97,22' 83,71"' 92,64"
99,35=
80,41''
BSLM30 42,41 64,30' 79,89 92,39' 96,43' 97,98' 87,87"
95,73"
93,52"
83,39' SEM
1,05 1,34 1,99 2,16 1,39 0,43 1,94 1,53 1,33 0,71
/ngSy) P 1,156 0,002 0,152 0,001 0,007 0,001 0,017 0,001 0,001 0,001 Ghi chii: ^'^Gii tri trung binh tiong cimg mdt hing vdi cic chu cii khac nhau la khac nhau (P<0,05) Kgt qua vdhgsd chuyen hda tinic an (HSCHT^ 11, 12 va 13 (P<0,05). Trong toin bd giai doan tiii oia g i Ri qua cic tuan tfai nghigm dupc irinh bay d nghigm, su tfaay thd cua cic miic ba sin l&n men bang 6. khac nfaau trong khau phan an da khdng Iim anfa Cd su sai khic nhau ro ret ve H S C H T A cua ga Ri hudng dgn HSCHTA cua g i Ri khi so sanh vdi khau khi an cac kfaau phin thi nghigm 6 iuin tudi thii 5, phin DC (P>0,05).
Bang 6. Anh hudng cua cic miic b i sin I6n men dgn hg sd chuy& hda thiic an (HSCffTi^ (kg thiic an/kg ting trpng, theo VCIQ v i chi phi tinic an/kg tang frpng cua g i Ri (ddng/kg ting t r p n ^ Sau 5 tuan
Sau 6 tuan Sau 7 tuan S a u 8 t u ^ S a u 9 t u ^ Sau 10 tuan Sau 11 tuan Sau 12 tuan Sau 13 tuan Ca giai doan Chi phi thiic an/kg TT (Ca giai doan)
DC 2,95"
3,48 4,18 4,39 3,67 3,98 4,40"
5,01"
5,30"
4,15 45633
BSLMIO 3,06"'
3,41 4,43 4,17 4,53 4,67 4,16' 4,19" ^ 4,04' 4,20 43529
BSLM20 3,60"'
3,19 3,83 4,59 4,28 4,41 4,34' 5,37"' 5,35"
4,30 42349
BSLM30 3,97' 3,74 3,92 6,04 4,84 4,37 4,86' 5,15"
5,62' 4,67 43630
SEM 0,22 0,35 0,27 0,51 0,35 0,19 0,10 0,22 0,13 0,12 1224
P 0,041 0,166 0,444 0,114 0,198 0,179 0,008 0,030 0,001 0,053 0.360 Ghich&.'^Gia tritrungbinh trong cimg mot hang
Chi phi thiic an/kg tang trong lu6n luon la van d^ quan tam lan cua nha chan nuoi. Niu nhu nguoi chan nuoi biet each tan dung va che bien cac nguon phu p h i n de thay the mot phan thiic an chan nuoi thi se dem lai hi6u qua kmh te cao, giam su c^nh tranh ve thiic an giiia con nguoi va dong vat, dong thoi thong qua do lam giam 6 nhiem moi truong do nguon phu p h i n gay ra.
N O N G NGHIEP VA PHAT TRIEN N O N G THON
vdi cic chu cii khic nhau li khac nhau (P<0,05) Kdt qua thu dupc tir thi nghigm niy cfao thay gia thinh cho 1 kg ihuc an d eie khau phan DC, BSLMIO, BSLM20 vi BSLM30 l i 10990,10380, 9830 v i 9340 ddng, tuong iing (Bing 1). Dua frgn kdt qui vd HSCHTA ciia thi nghigm v i gii thinfa cfao 1 kg thiic an tu phdi frdn ehiing idi da iinh toin cfai pfai tfaiic i n / k g ting frpng. Kdt qua cho thiy ehi phi thiic an/kg tang frpng ciia g i Ri kfai an khiu phin DC, - K Y I -THANG 11/2015 105
KHOA HOC CONG NOHl BSLMIO, BSLM20 va BSLM30 la 45633, 43592,
42349 va 43630 dong, tuong iing (Bang 6). Dieu nay cho thay khi tang ty 16 thay t h i BSLM trong khau phan thi giam duoc chi phi Ihuc an/kg tang trong.
3.3. Anh hu6ng dia c i c miic ba six Ifin men khac nhau d ^ nang suit, chit hiong va thdnh phin hoa hpc cua Ihit gd Ri
3.3.L Nang suat tiiit
Khong CO su khac nhau v4 khoi luong sdng cua ga Ri khi an cac khau phan co cac miic BSLM khi so voi khiu phan DC (P>0,05) (bang 7).
Ty te than thit, ty te thit diii va ty te thjt nguc cia ga Ri deu khdng co su sai khac nhau khi so sanh giiia cac khiu phan thi nghi6m (P>0,05). Nghien ciiu cua L6 Thi Thiiy va cong su (2011) cho htit ty te than thit cua ga Ri liic 14 hian tudi dat 66,27*, thap hon k^t qua nghien cuu ciia chiing toi. Ho Xuan T i n g va Phan Xuan Hao (2010) cho biet ty le than thit, ty le thit dii va ty le thit nguc cua ga Ri luc 11 tuan tudi la 67.77, 20,38 va 14,72%, Wong ling, thap hon ket qua c i a chung toi. Trong thi nghi&m c i a ching t6i, cac chi tieu nay d^u cao han, CO th^ do khdi luong gidt md c i a ga Ri U-ong thi nghiem nay lie 13 tuan tudi la cao hon, do do cac chi tieu v^
nang suit thit cung cao.
3.3.2 Chatluangtilit
Kdt qua 6 bang 7 cho thay khdng co su khac nhau vd cac chi tieu chat lugrng thit nhu ty Ie mat nuoc sau 24 gia bao quan, ty le mit nuoc sau 25 phut che bidn va mau sic cia thit ga Ri khi an cac khau phan DC va BSLM (P>0,05). Cung theo L6 Thi Thuy vacongsu (2011) thi tyle mit nudc c i a thit gaRi sau
le mat nuoc sau chd bidn dia thit ga Ri la 3,65 va 17,00%, hrong ung (Hd XuSn Tung & Phan Xuan Hao, 2010). Trong khi do thit ga Ri trong thi nghiem nay o lit cii khiu phan DC va khiu phan cd chiia cac muc BSLM deu cd ty te mat nudc sau bad quan Ihap hon nhieu.
Man sac Ihit ga Ri giiia cac khiu phan DC va khau phan cd chua cac muc BSLM khdng cd su khac biet ldn, anh sang (L), dd (a), vang (b) a cac khiu phin DC, BSLMIO, BSLM20 va BSLM30 la 48,23, 2,05, 7,91, 48,49, 1,86, 4,90, 44,82, 2,30, 4,47, 43,39, 2,34, 3,80, tuong ling. Le Thi T h i y va cdng su (2011) cho biet mau sic c i a thit gd Ri cd anh sang (L), do (a), vang (b) la 42,94, 3,40,4,37, hrong ung. Theo Hd XuSn Tung va Phan Xuan Hao (2010) man sac stag (L), do (a), vang (b) c i a thit ga Ri la 48,52, 9,59, 13,15, hiong ung. Nhu vjy, kdt qua vd man sac ciia thit ga Ri trong thi nghiem c i a ching tdi nam hong gidi ban cho phep.
3.3.3. Thanb phin hoa hoc cia thit Thanh phan hda hoc cua thit ga Ri duoc hinh bay d bang 7. Khong cd su khac nhau vd thanh phin hda hoc c i a VCK, CP, khoang c i a Ihit ga Ri khi in cac khiu phin DC va khau phan cd chua cac muc BSLM (P>0,05). Tuy nhien, cd su khac nhau vd EE khi so sanh thit c i a nhung con ga Ri an cac khau phin DC va khiu phan BSLM (P<0,05). Cu thd, EE c i a ga Ri an khau phan cd chiia 20 va 30% BSLM la thip hon EE c i a ga Ri an khiu phin DC. Le Thi Thuy va cdng su (2011) khi phan tich thinh phin hda hoc c i a thit ga Ri cho bidt VCK, CP, EE, khoing c i a thit ga Ri ddu tuong tu nhu kdt q u i nghien cuu niy.
bao quan la 2,4%. Ty te mil nudc sau bao quan va ty
Bang 7. Anh hudng c i a cic miic ba sin len men k h i c nhau ddn nang suit, chit hipng vd thinh phin hda hpc cialfaitgaRi
1 DC 1 BSLMIO 1 BSLM20 | BSLM30 I SEM | P Nang suat tbit
Khdi hiong sdng (g) Tyte than thit (%) Tyte thit dii (%) Tyle thit nguc (%)
1585 74,07 20,75 15,37
1552 73,02 22,09 15,64
1447 72,42 21,29 16,20
1530 75,05 21,66 15,66
81,22 0,91 1,14 0,84
0,675 0,242 0,862 0,917 Chat luong tbit
Ty te mit nudc sau 24 gid bao quan Ty Ie mil nudc sau 25 phut chd bidn Mau sic thit
1,63 21,88
2,69 26,13
1,39 23,70
1,04 23,84
0,44 1,12
0,106 0,119
NONG NGHIEP VA PHAT TRIEN NONG T H 6 N - KY 1 - THANG 11/2015
L(sang) a(dd) b(vang)
48,23 2,05 7,91
48,49 1,86 4,90
44,82 2,30 4,47
43,39 2,34 3,80
1,72 0,46 1,42
0,145 0,876 0,237 Thanh ph4n hoa boc aia thit
VCK(%) CP(%NT) EE(%ND Ash(%NT)
25,32 23,64 1,05"
0,77
24,81 23,09 0,97"
0,75 24,64 23,10 0,76'=
0,75 24,09 22,78 0,68' 0,73
0,34 0,30 0,06 0,02
0,145 0,289 0,007 0,412 Ghi chii: ''^Gia tri tnmg binb trong cimg mot hang
4. KET LIMN
Su thay the 30% ba sin ten men trong khau phan an cia ga Ri da khdng lam anh huong den hieu qua sinh trudng, he sd chuyen hoa thuc an cua ca giai doan thi nghiem, nang suit va chit luong thit Chi phi thiic an/kg tang hong cd khuynh huong thap b khau phan thi nghiem cd c h i a cac rniic BSLM khac nhau.
i n CAM ON
Nhom tac gia xin chan tbanh cam an Truong Sau Dai hoc nghiin am Moi tnrong toan cau (GSGES), Bm hoc Kyoto da hS trcr kinb phi nghien ciiu de tien hanh tbi nghiim nay. Xin chan tbanh cam on sir giiip da tan tinh ciia anh chi em phong thi nghiem Khoa Chan nuoi Tbu y, cac can bo giao vien tre bd mdn Chan nudi chuyen khoa, bo mon Bi truyin giiing, cac ban sinh vien CNTYkhoa 45 da tan dnh giiip da cbiing tdi hoan tbanh thi nghiim nay.
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EFFECT OF DIFFERENT LEVELS OF FERMENTED CASSAVA WASTE IN DIETARY ON GROWTH PERFORMANCE, MEAT PRODUCnVTIY AND QUALITY OF RI CHICKEN
Tran Thi Thu Hong, Hoang Quoc Hung, Le Van An, Hidenori Harada Summary
Effect of different levels of fermented cassava waste in dietary on growth perfonnance. meat productivity and quality was earned out with 240 Ri chicken at 4 weeks of age divided randomly into 4 treatments, each treatment consists of 60 chickens with 3 replicated (20 chickens/pen/replicated, m which 13 females and 7 males). TTie experimental diets included: DC (control diet consists of concentrate feed, maize, rice bran), BSLMIO (included concentrate feed, maize, rice bran + 10% of BSLM), BSLM20 (included concentrate feed, maize, rice bran + 20% of BSLM), BSLM30 (included concentrate feed, maize, rice bran + 30% of BSLM).
The results showed that the experimental diets with different levels of fermented cassava waste did not affect body weight, growtii rate of Ri chicken when compraision with chicken fed DC diet Feed mtake was lowest in Ri chicken fed DC and BSLMIO. Feed conversion ratio (HSCHT^ and feed cost/kg gain weight did not different beetwen experimental diets (P>0.05). The replacement 30% of fermented cassava waste in dietary of Ri chickens did not affect meat productivity, quality and chemical composition of Ri chicken meat Keywords: Ri chicken, fermented cassava waste, meat productivity and quahty.
Nguiri phin bi^- GS.TS. Vfl Duy Giang Ngiy nhin bii: 3/8/2015
Ngiy thdng qua phin bien: 3/9/2015 Ngiy duy^i ding: 10/9/2015
*^^ NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 11/2015
