CHAN NUOI PONG VAT VA CAC VAN DE KHAC
12. Tran Thi Thu Thuy (2003), Ket qua nghien ciiu 14. Ta Thi Vjnh va Dgng Thj Hoe (2002), Mft so sil dyng che pham Probiotic (Organic Green) ket qua sii dyng cac che pham sinh hoc de trong phong ngira va dieu tri tieu chay do £. coli phong trj bfnh tieu chay 6 lpn con, Tgp chi khoa tren heo con. Luan van thgc si Nong nghifp DH hoc ky thuat thii y, 9(4): 54-56.
Nong Lam thanh pho Ho Chi Minh. j 5 Wolter B.F., Ellis M., Corrigan, B.P. and 13. Nguyen The Tuong, Nguyen Van Phii va DeDecker, J.M. (2002), The effect of birth Dgng Thuy Nhung (2014), Anh huong a i a bo weight and feeding of supplemental milk sung canxL butyrate vao khau phan lon con giai replacer to piglets durir^ lactation on dogn 7- 50 ngay tuoi. Tap chi Khoa hpc ky thugt preweaning and postweaning growth chan nuoi, 4:35-41 performance and carcass characteristics. J.Anim.
Sci., 80:301-308.
su" DUNG B O T R I E N G {Alpinia officinarum Hance) THAY THE KHANG SINH TRONG KHAU PHAN AN
U y / r C U A L O N T H l T -
Dang Hodng Ldm^' vd Nguyen Tdi Ndng'
N g a y n h a n b a i b a o : 19/11/2014 - N g a y n h a n b a i p h a n b i f n : 28/11/2014 N g a y b a i b a o d u o c c h a p n h a n d a n g : 29/11/2014
T O M T A T
Nghifn Clin sir d y n g b f t rieng kho thay the khang sinh tong h g p trong ihiic Sn ciia Ion thit nh^m danh gia kha nang bo sung rieng vao thiic an chan nuoi Ign. Khau p h a n an cua lpn thit giai doan tir sau cai siia deh 120 ngay tuoi d u g c bo sung 0,5% hot rieng kho; lgn 6 khau p h a n do'i chiing 6 d i n g do tuoi dugc cho an hai khau phan co bo sung 50ppm chlotetracyline va khong bo sung khang sinh. Thi nghifm tieh hanh theo doi kha nang san xua't, kha nang khang bfnh va chat l u g n g than thit ciia Ign. Kf^ qua cho tha'y, Ign d u g c cho an khau phan co 0,5% bgt rieng co kha nang tang trgng, hifu qua sir d u n g thiic an, cha't lugng than thit, cac chi tieu huyet hgc tuong d u o n g voi doi c h u n g sir d u n g khau phan an hS sung khang sinh. Ty If ngay con nhiem hgi chiing tieu chay va ho tho giam d a n g ke so voi ign 6 16 khong dugc bo sung khang sinh trong khau phan.
rii' khoa: Rieng, thay thi'ldidng sinh, kitd nang san xudi, khdng benh.
A B S T R A C T
U s i n g l e s s e r g a l a n g a l (Alpinia officinarum Hance) p o w d e r to replace antibiotic o n pig d i e t Dang Hoang Lam and Nguyen Tai Nang The research used the dry p o w d e r of lesser galangal to replace the antibiotic on pig diet aimed to evaluate the ability of supplement lesser galangal on the pig feed. The diets of pig from the postweaning to 120 days were supplied 0,5% DM galangal powder; pig on the control diets on the same old were
' Truong Dai hgc Himg Vuong.
* Tac gia de lien hf: Thac sT Dang Hoang Lam, phong Q u ^ ly khoa hge va quan hf quoc te, Trucmg Dgi hgc Hiing Vuong, DT; 0972 808 092. Email; [email protected]
58 KHKT Chan nudi 8^2-2015
ixrti-I NUOI D O N G VAT VA CAC VAN DE KHAC
added 50ppm chlotetracyline and none antibiotic diet. The experiments observed the performance, desease resistance and carcass quality. The result showed that the pigs, were feeded 0,5% galangal p)owder diets, presented the ADC, FCR, carcass quality, hematological and biochemical characteristics no lower than pig's on the controls diets. The percentage of the day of diarrhea and respiratory syndrome decreased significantly.
Keywords: Lesser galangal, replace antibiotic, growth performance, desease resistance
1. DAT VAN DE
Thao diroc co hoat tinh khang khuan da va dang duoc sir dyng trong thuc an chan nuoi rdiam thay the' khang sinh tong hpp.
Cac loai khang sinh thao dirge co kha nang kieh thich tang trgng, tang hifu qua su dyng thiic an, kich thich hf tho'ng mien djch qua do lam giam ty tf vat nuoi mac bfnh (Afshar, 2012). Cac h(?p chat thien nhien trong thao duoc nhu polj^henols, flavonoids va polysaccharides co kha nang t^o ra cac san pham thit co chiia chat cho'ng oxy hoa ben viJng va lam tang thoi gian bao quan th)t ma khong can su dung them khang sinh tong hgp (Yeh va ctv, 2013). Vi vay, sir dung thao dtrgc trong khau phan an ciia vat nuoi se tao ra eac san pham thit an toan, co lgi cho sire khoe ciia ngiroi tieu diing, qua do nang cao gia tri cua san pham chan nuoi.
Rieng {Alpinia officinarum Hance) - mgt lo?i gia vi rat pho bie'n 6 Viet Nam - co kha nang khang m?nh voi cac lo?i vi khuan Gram dirong S.aureus va Bacillus subtilis, vi khuan Gram am la E.coli, Klebsiella pneumoniae. Salmonella typhi vd nam (hidrayan va ctv, 2007). Tuy nhien, nghien cihl ve hoat tinh sinh hgc cua rieng moi chi dung lai 6 pham vi phong thi nghifm ma chua xem xet toi vifc sii dung loai thao dugc nay trong ehan nuoi. Vi v$y, trong nghien ciiu nay, chiing toi nghien eiin phuang phap che' bien va bao quan rieng nham bo sung vao khau phan an ciia lgn thjt; danh gia anh huong ciia bgt rieng toi kha nang san xuat cung nhu siic khang bfnh ciia v^t nuoi.
2. VAT LI?U VA PHU'ONG P H A P NGHIEN
cut;
2.1. Doi tugng nghien cuu
- Lgn thit giong Landrace-Pietran ttr eai sira deh 120 ngay tuoi.
- Bgt rieng (Apinia officinarum Hance) kho.
2.2. Dia diem va thoi gian nghien ctru - Thi nghifm danh gia kha nang khang khuaji va phuong phap ehe' bien bgt rieng dugc tie'n hanh tai Phong thi nghifm Khoa hoe dpng vat, Truong Dgi hgc Hiing Vuong tir thang 8 nam 2013 den thang 01 nam 2014.
- Lgn du(?c nuoi tai Trang trai chan nuoi lgn eong nghifp ciia ba Nguyen Thj Oanh, Son Duong, Lam Thao, Phii Thg tir thang 3 de'n thang 9 nam 2014.
2.3. Phuong phap nghien cuu
2.3.1. TTiii* nghi$m hoat tinh khdng khuan cua bgt rimg kho
- Cli rieng tuoi dugc lam sgch, logi bo phan thoi hong, eat nho, say kho a nhift dg SO^C, roi nghien nho, kich thuoc hat 0,5mm bao quan trong cac tiii nilon o nhift dg phong.
- Chuan bi dich chie't con ciia rieng:
+ Djch chie't tu cii rieng tuoi: thao dugc tuoi sau so che' dugc ngam trong eon ethanol 70% voi ti If Igilml. Sau 24 gio chat lay dich trong.
+ Dich chiet tir bgt kho rieng: bgt kho rieng ngay sau khi say kho va bgt kho bao quan 6 nhift dp phong sau 2,4, 8, 16 tuMi dugc ngam
KHKT Chan nuoi S£f 2-2015 59
CHAN NUOI DONG VAT VA CAC VAN DE K H A C
trong con ethanol 70% voi ti le lg:4ml trong 24 gio. Sau 24 gio chat lay dieh trong.
- Khoanh gia'y dugc tam 300pl mpt trong eae dich chie't noi tren va lam kho bang binh hiit chan khong 6 nhift dp SS'C
- Thli hoat tinh khang khuan; vi khuan dupe lang deu tren be mgt thach Mulier Hilton voi so'lupng 0,15 x lOVdTa thach, de trong til a'm 10 phiit. Cac khoanh gia'y da ehuan bi dupc dat tren be mat dia thgch da ca'y vi khuain va de 6 nhift dp phong 30 phiit truoc khi cho vao tu am. Dgc ke't qua sau 18-24 gio.
2.3.2. Ste dung bQt rieng thay thf khdng sinh trong khd'u phan an cua l^
- Thie't ke'thi nghifm: lgn con sau cai sira 6 21 ngay tuoi dugc chia lam 316 thi nghifm, moi 16 thi nghifm dugc bo tri 3 Ian lgp Igi, moi lan lgp lgi co tir 19-23 eon. Lpn trong cae 16 thi nghifm dupc cho an tu do cac khau phan KPO, KPI, KP2. Trong do, KPO la khau phan doi ehiing kh6ng chiia khang sinh va thao dugc, KPI la khau phan chiia 50ppm oxytetracyline, KP2 la khau phan chira 0,5%
bpt rieng kh6.
- Thanh phan dinh duong khau phan an aia lpn dupe trinh bay 6 bang sau:
Thanh phan dinh dirong Thanh phan dinh duong Gidbi
Do am Protein tho
ME Xotho
H 0 % 18,0%
3200 Kcal/kg 6,0%
Canxi (min-max) 0,5% -1,8%
Phot pho tong s6'(min-max) 0^% - 1 ^ % Lysine tong so 1,2%
Meth +Cys tong s6' 0,9%
- Cac chi tieu theo doi;
+ Thu nhan thiie an hang ngay.
+ Tang khoi lupng (ADC - g/eon/ngay).
+ Ty If tieu hoa thiic an (FCR - kg thiic Sn/kg tang trpng).
+ Ty If tieu chay (%), + Tylf lpnhothd(%).
+ Mpt so' ehi tieu huyet hpc ciia lgn: S6' lupng hong cau, bgch cau, e6ng thiie bach cau, AST, ALT, biliburin toan phan, protein toan phan, ure, uric.
- Trong moi 16 thi nghifm, la'y mau ciia 05 lpn sau 30 ngay dupe cho an cac khau phan trong thi nghifm. Mau dupe bao quan trong 6'ng ch6'ng d6ng 6 nhift dp 8-10''C truoc khi dem phan tich tgi Benh vien da khoa tinh Phii Thg.
- Khoi lupng song ciia lpn duoc can truoc khi vao thi nghifm va sau khi ket thiic
thf nghifm b^ng can dong ho Nhon Hoa, sai solOOg.
- Sau khi ke't thiic thi nghifm, moi 16 thi nghifm mo 03 con lpn dupc giet thjt de khao sat ty If than thit va ty If thjt xe.
- Chat lugng than thjt lpn; Ty If than thit/kh6i lupng so'ng, ty If % thjt xe/khoi lugng so'ng.
2.3.3. Phuang phdp xit ly soli^u Xir ly so' lifu bang phuong phap so sanh phuong sai mgt nhan t6' (ANOVA One Way) tren phan mem Minitab 16.
3. KET QUA VA THAO LUAN 3.1. Kha nang khang khuan cua bpt rieng
De Sli dung rieng bo sung vao thuc an cho lpn, ehiing toi danh gia anh huong cua phuong phap che' bieh va bao quan gom:
60
KHKT Chin nu6ISi(2-2015CHAN NUOI DONG VAT VA CAC VAN DE KHAC
thai nho, say kh6, nghien nh6, bao quan a nhift dp phong trong 2, 4, 8, 16 tuan toi kha nSng khang khuan ciia rieng; so sanh voi sire
khang khuan ciia rieng truoc khi che' bie'n.
Ke't qua thu dupc trinh bay 6 hinh 3.1.
mm 2 5 1 20 • - V
10 -1 - -
0 • R * n g
t u c i
—»-E.coli
Sau siy SausSy Saus^y Sau siy Saus^y M\t> khd 2 kho 4 kho 8 kho 16
tu^n tu^n tu^n tu^n
—•—Salmonella —•—Slaphylococus 1
Hlnh 3.1. Khi nang khang khuan cua bgt rieng khd sau che bien va bio quin Hinh 3.1 cho tha'y, rieng tuoi co siic
khang mgnh vol cac vi khuan gay bfnh tren duong tieu hoa cua lpn. Trong do, siic khang mgnh nha't dol voi Staphylococus va ye'u nha't voi Salmonella. Say kho khong Iam mat di hoat tinh khang khuan cua rieng ngay ca khi dupc bao quan 6 nhift dg phong de'n 16 tuan.
Sa'y kh6 la mgt bifn phap pho bien va co ban nhat de bao quan thao dupe sau thu hogch boi vi day la bifn phap don gian nha't cho phep nhanh chong bao vf dupc eac hogt chat CO trong thao dugc. Say kho eung la bifn phap bao quan thao dugc kinh te nha't do dau tu tha'p, gia thanh nang lupng re va CO the san xua't s6' lugng lon (Mulier and Heindl, 2006). Nghien ciiu ciia tae gia nay ciing cho bie't, nhift dg thich hpp nha't de sa'y kh6 thao dugc 6 SCC boi cha't lupng thao dugc se suy giam ne'u sa'y 6 nhift dg cao hon. Sa'y kh6 ciang thuan tifn cho qua trinh sir dyng cac san pham thao dugc nay trong qua trinh san xua't thire an ehan nu6i.
Fennell va ctv (2004) ciing cho bie't bao quan
thao dupc 6 dgng kh6 kh6ng lam thay doi tinh khang khuan a i a thao dupc. Mgt so" loai CO the bao quan trong dieu kifn nhift dg phong (22'C) trong tir 18 thang de'n vai nam.
So dl nhu vay la vl hau he't tinh khang khuan cua thao dtrpc deu lien quan de'n eae hpp cha't nhu linoleic, oleic acid va eac axit beo. Nhiing hgp cha't nay rat ben trong dieu kifn sa'y kho.
Nhu vgy co the thay rang, rieng dupc sa'y kho nghien nho va bao quan 6 nhift dp phong the hifn to't kha nang khang khuan va CO the Sli dyng trong thiic an chan nuoi thay the'khang sinh tong hpp.
3.2. Anh h u o n g cua bpt rieng den kh&
nang tang khoi lupng ca the ciia lpn De danh gia kha nang tang kh6i lupng va hifu qua sir dung thiic an ciia lpn sir dyng kha'u phan dupc bo sung 0,5% bpt rieng, chiing toi tie'n hanh thi nghifm so sanh voi lgn dugc cho an khau phan kh6ng CO khang sinh va co khang sinh. Ke't qua duge trinh bay trong bang 3.1.
KHKT Chan nudi S£ 2 - 2 0 1 5
CHAN NUOI D Q N G VAT VA CAC VAN DE KHAC
B i n g 3.1. Ket q u i v e k h i n a n g t a n g k h o i l i r g n g cila l g n s u d y n g k h a u p h a n b o s u n g b p t rieng Chi tilu theo doi KPO KPI KP2 Khoi luvng dau thi nghilm (kg)
Khoi lupng kli thiic thi nghi?m (kg) l a n g KL trong thoi gian thi ngiii^m (kg) ADG (g/con/ngay)
KhcH luvng thiic an sir dung (kgTA) FCR(kgTA/P)
6^±0,6 80,6 ±3,1 7 i l ± 2 , 8 740 ±51 124,58 ±5,4
2,3 ±0,11
6,7±0,5 87,6 ±3,4 80,9 ±3,0 810 ±74 120,30 ±4,8 2,18 ±0,09
6,7±0,5 S6,7±?.9 80±3,0 800±86 123,20 ±6,6
2 J ± 0 , 1
Ke't qua cho tha'y, kha nang tang trpng va hifu qua sir dyng thiic an cua lpn sii dung kha'u phan bo sung bpt rieng tuong duong voi ke't qua theo doi tren lpn sir dyng khaiu phan co bo sung khang sinh va kh6ng CO khang sinh.
Thao dupc da dupc sir dyng trong kha'u phan 3n cua lpn voi vai tro la cha't kich thieh sinh truong (Papatsiros va ctv, 2011). Thao dupc CO tac dyng lam tang thu nhan thiic an, cai thifn chiic nang duong rugt va tang dp ngon mifng. Dg ngon mifng eua thiie an phy thugc vao miii vj va ham lugng tinh dau c6 trong thao dupc {Frankic va etv, 2009).
Thio dupc CO tinh khang khuan lam giam hoat dgng cua vi khuan trong duong tieu hoa aia lgn dong thoi lam tang tiet nuoc bpt, tang hifu qua hogt dgng ciia cac enzyme tieu hoa, mgt va niem djch duong rugt (Namkung va ctv, 2004; Frankic va ctv, 2009).
Manzanilla va ctv (2004) cho rang, cac djch chiet thao dugc da lam tang siic chiia aia dg day Vci thai gian luu lai a i a thiic an trong dg day do vgy cung dong thoi lam tang Bing 3.2. Ket q u i v^ k h i nang khing bfnh
pH. Djch chie't thao dupc cung lam giam vi khuan tong s6' trong hoi trang va tang ty If vi k h u a n lactobacilli/enterobacteria. Thanh phan axit beo bay hoi trong manh trang va dgi trang cting thay doi dang ke^ acetate tang len va giam ham lugng butyrate va valerate. Dich chiet tir thio dugc da anh huong deh hf sinh thai duong rupt ciia lgm, siie chiia a i a da day va ty If rong ciia dg day. So lugng vi khuai lactic da tang Ien dang ke' khi cho lgn sir dyng kha'u phMi bo sung thao dupc so vol Ign 616 sir dyng thiic 3n co bo sung khang sinh (Nguyen Thj Kim Loan va ctv, 2011).
3.3. A n h h u d n g cua bpt rieng den k h i nang khang b f n h 6 lpn
Danh gia hifu qua bo sung bgt rieng trong khau phan an eiia lgn d6i voi kha nang khang bfnh, chiing t6i theo doi kha nang khang lgi cac hgi chung tieu chay, h6 hap va mgt s6' chi tieu huyet hgc a i a lgn trong thi nghifm so sanh voi lgn sii dyng cac khau phan doi chiing. Ke't qua theo doi trinh bay 6 bang 3.2 va 3.3.
cua Ign sir dyng khitu phin bo sung bgt rieng O l i lieu Iheo doi
So' luong ion dau thi nghifm Ty II loai thai (%) Tong so'ngciy con nuoi (ngay) So'ngay tieu chiy (ngay) Ty 1| ngay con tieu chiy (%) S6'ngiy ho th6 (ngay) 1^ le ngay con ho th6 (%)
KPO 20 10,0 2000 4t7-±8,9 2,24-±0,7 54,1'±9,1 2,70" ±0,6
KPI 21 4 8 2100 I8,3»±7,3 0,87* ±0,2 7,6»±1,5 0,36* ±0,08
KP2 22 9,1 2200 348* ±8,5 1,58* ±0,4 11,9»±27 0,54'±0,1 Ghi chu: NhOhg gid tri trung binh trong ciing mdt h
ngMa thdng ki a miic y nghla p<0,05.
g ngang mang tihOng chU cdi khdc nhau thi su sai khdc co
62 KHKT Chan nuoi So 2 - 2 0 1 5
CHAN NUOl DONG VAT VA CAC VAN DE KHAC Ke't qua 6 bang 3.2 cho tha'y, chi eo
1,58% va 0,54% so'ngay nuoi lgn bj tieu chay va ho tho khi dupc cho an khau phan co bo sung bpt rieng. Ti If nay tuong duong voi lpn 6 kha'u phan an co bo sung khang sinh va tha'p hon so voi lpn 6 16 khong bo sung khang sinh 6 miic y nghia p< 0.05. Trong thi
nghifm nay cho thay, ty If lgn bj Ioai thai 6 lgn a khau phan KP2 v^ KPO la tuong duong nhung li do logi thai ri't khac nhau. Trong khi 02 lpn hi logi thai 6 khiu phan KPO la do coi cpc sau tieu chay thi lgn 6 khau phan KP2 bj loai thai do cac nguyen nhan ngoai khoa nhu Hecni.
Bing 3.3. M$t so chi tieu huy^t hgc cua Ign sii dyng khau phan b6 sung bgt rieng
Chi lieu theo doi KPO KPI KP2
Cic dli tieu sinh ly mau WBC10»9 RBC10"12 HGBg/L
Hcr%
MCVfL M C H p g MCHCg/L
i5i±^n 7,8±0,48 124,5±9,09 4 i 8 ± 2 , l l 54,9 ±2,66 15,9±0,83 290,8 ±9,95
103 ±234 7,4 ±0,68 1233 ±16,6 42,2 ±533 553 ±2,66 163±0,7 2923±4
l i 3 ± 3 3 5 7,1 ±032 118,2 ± 1 1 3
403 ±3,94 56,4 ±Z44 163 ±0,67 293,0 ±5,18 Cic chi tieu sinh hoa m i u
Protein (g/1) Allniniin (g/1) Globunn(g^
Biliburin (mmolyl) Uie(niinoiyi) GC1T(U/1) BOr(U/l)
58,52 ±2,9 35,34*5,8 2234±3,18 1,53 ±0,27 435 ±0,67 345 ±3,92 3 7 3 ±1,14
5835 l 3 J 7 3414 ±5,62 2462±3,62 1,45 ±0,21 422 ±0,77 36,17 ±1,08 3639 ±1,23
5931 ±3,01 33,16 ±11,55 2 5 3 ±2,4 136±0,09 443±0,74 3^63 ±1,08 36,29 ±1,4 Ghi (h± WBC: so luang bgch cau, RBC so lugng
hematocrit, MCV: thi tich trung binh hong cdu, nong do Hb trung h^nh hong cdu.
Ke't qua phan tich cho tha'y, bo sung hot rieng khong anh hudng toi cac ehi tieu sinh ly, sinh hoa mau ciia Ipn trong thi nghifm.
Cac chi tieu nay deu nam trong gioi han cho phep cua lpn khoe mgnh. Tir ke't qua bang 3.2 va 3.3 co the tha'y rang, bo sung bgt rieng trong khau phan an ciia lgn lam tang kha nang mien dich a i a lpn. Ty If lgn bJ ho tho va tieu chay da giam ro ret. Cac chi tieu sinh lv sinh hoa mau ciia lpn kh6ng thay doi.
hdng cau, HGB: luang hemoglobin, HCT: Wim hong c&t MCH: lugng Hemoglobin trung binh hong cSu, MCHC:
Nguyen Thi Kim Loan va ctv (2012) bo sung 3% bgt nghf va toi vao khau phan i n cua lpn da cho thay mgt so chi tieu huye't hpc cua lgn da thay doi. S6'lugng hong cau, albumin huye't thanh ciia lpn cag hon khi sir dyng khau phan bo sung khang sinh. Bo sung thio dupc trong kha'u phan an ciia lpn cung Iam giim ty If lgn bi nhiem E.coli dung huye't va Salmonella (Dgng Minh Phuoc, 2011).
KHKT Chan nudi Sfif2-2015
C H A N N U O I D Q N G V A T V A C A C V A N D E K H A C Cac ehi tieu huye't hgc cua lgn trong thi
nghifm khong cho tha'y su sai khac voi 16 dol chiing cho tha'y, bo sung bgt rieng trong khau phan an ciia lgn khong anh huong deh qua trinh ha'p thu, chuyen hoa cac cha't dinh duong nhu vitamin B2, axit fohc, sat, magie, oxy, duong, protein va cac chat dinh duong khac. Agbabiaka va ctv (2014) bo sung bpt hoa dam byt trong khau phan an ciia lgn da cho tha'y, hau het cac chi tieu sinh ly sinh hoa mau ciia Ipn deu tang len. De'n nay, chua eo
e6ng bo nao cho tha'y, bo sung thao dupc lam giam cac chi tieu huyet hpe eiia lpn.
3.4. Anh h u d n g cua bpt rieng den chat lupng than thit Ipn
Danh gia anh huong cua bpt rieng trong khau phan an ciia lgn de'n chat lugng than thit, ehiing t6i tie'n hanh mo khao sat Ign ngay sau khi ket thiic thi nghifm. Ket qua the hifn 6 bing 3.4.
Bing 3.4. Ket qui chat lupng than thit ciia Ign su dyng khau phan bo sung bpt rieng Chi lieu Iheo doi
Khoi luvng so'ng (kg) Kh6l lui;mg than thit (kg) Tyle than thit (%) Khoi luong thit xe (kg) Tyle thit xe(%)
KPO 83,7 ± 4 5 65,4 ± 4 3 78,2 ±1,0 583 ± 4 0 69,9 ± 1 3
KPI 89,2*3,1 71,2*23 78,9 ±2,1 62,2 ±1,7 69,7 ± 1 3
KP2 893 ±3,7 70,6 ± 3 3 77,8 ±3,1 6 2 , 0 ± V 693 ± 1 3
Ket qua nghien ciiu cho tha'y, chat lugng than thjt lgn 6 eac khau phan an kh6ng eho thay sy sai khac co y nghia th6hg ke. Ty If than thjt deu dat den 78%, ty If thit xe dgt xa'p xi 70%. Nhu vay, bo sung bpt rieng vao kha'u phan an eua lpn khong anh huong toi ty If than thit va ty If thit xe.
Nghien ciiu ciia Yeh va ctv (2013) bo sung de'n 0,7% hon hgp mot so loai thio dupc vao thiic i n cua lpn thit cho thay, chat lupng than thjt lgn kh6ng thay doi so voi nhom lpn dupc cho an khau phan an bo' sung khing sinh tong hgp (chlortetracyeline va oxytetracyline). Tuy nhien, tie gia cung nhgn thay, tuy ti If than thit va ti If thit xe cua lpn kh6ng eo su sai khac ro rft nhung mau sac thit va dp mat nuoc ciia thit da cai thifn ding ke so voi 16 d6i chiing sir dung khau phan co khang sinh. Nguyen nhan dugc cho la do anh huong ciia hai hgp chat thien nhien polyphenol va flavonoid v6'n rat pho bie'n trong thao dupc.
4. KET LUAN
Sa'y kho va bao quin 6 nhift dp phong toi 16 tuan kh6ng lam mat kha nang khang khuan ciia rieng.
Bo sung bpt rieng voi miic 0,5% kh6ng Iam anh huong toi kha nang tang trpng, hifu qua sir dyng thiie an, ty If tiian thjt ty If thjt xe va cac ehi tieu sinh ly, sinh hoa mau aia lpn thjt.
Sli dyng 0,5% bpt rieng h:ong khau phan an ciia lpn tfijt da lam giam ty If ngay con nuoi mac hpi chiing tieu chay va ho tho ciia lpn.
Bo sung bpt rieng voi ti If 0,5% co kha nang thay the' khang sinh tong hpp trong thiic an chan nuoi lpn thjt.
TAI LIEU THAM KHAO
1. Afshar M.A. (2012), Importance of medical herbs in animal feeding: A review. Annals of Biological Research, 3(2): 918-923.
2. Agbabiaka L.A., Nkwocha G.A., Anukam K.Uv Bekefin T.O. (2014), Evaluation of
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CHAN NUOI DONG VAT VA CAC VAN DE KHAC
Roselle (Hibiscus sabdariffa Linn) calyx meal as dietary supplement in grower pig production. International Journal of AgriScience, 4(6): 293-300.
Fennell C.W., Light M.E., Sparg S.G., Stafford G.I., Staden J.V. (2004). Assessing African medicinal plants for efficacy and safety:
agricultural and storage practices. Jounal of Ethnopharmacology, 95:113-121.
Frankic T., Volig M., Salobir J., Rezar V.
(2009), Use of herbs and spices and their extracts in animal nutrition. Acta Agri. Slovan., 92(2): 95-102.
Indrayan A.K., Garg S.N., Rathi A.K., Sharma V. (2007), Chemical composition and antimicrobial activity of the essential oil of Alpinia officinarum rhizome. Indian Joumal of Chemistry, 46B: 2060-2063.
Nguyen Thi Kim Loan, Tran Thj Dan, Nguyin Thi Thu Nam va Tran Thi Minh Tuyen (2011), Tac dyng cua toi, nghf len so' Iugng vi khuan sinh a d d lactic va vi khuan gay bfnh co hpi trong phan heo tu 30 deh 90 ngay tuoi. Tap chi Khoa hgc ky t h u | t Chan nuoi, 12(153): 2-9.
Nguyen Thj Kim Loan, Tran Thj Dan va Ho Thi Nga (2012), Anh huong ciia toi len mgt s6' chi tieu sinh ly, sinh hoa mau va sue tang truong cua heo con 30-90 ngay tuo'i. T^p chi Khoa hgc ky thuat Chan nuoi, 1(154): 2-9.
8. Manzanilla E.G., Perez J.F., Martin M., Kamel C , Baucells F., Gasa J. (2004), Effect of plant extracts and formic acids on the intestinal equilibrium of early-weaned pigs. Journal of Animal Science, 82:3210-3218.
9. Mulier J. and Heindl A. (2006), Drying of medicinal plants. Medicinal and aromatic plants, 237:252.
10. Namkung H., Li M., Gong J., Yu H., Cottril M., de Lange C.F.M. (2004), Impact of feeding blends of organics acids and herbal extracts on growth performance, gut microbiota and digestive function in newly weaned pig.
Can.J.Anim. Sd., 84(4): 697-704.
11. Papatsiros V.G., Tzika E.D., Tassis P.D., Kantas D., FiUppopouIos L.C., Papaioannou D.S. (2011), Greek experience of the use of phytogenin feed additives in organic pig farming. J, Cell & Amm. Biol., 5:320-323.
12. Dgng Minh Phuoc (2011), Nghien cihi iing dyng mft so che pha'm acid huu co, probiotic, thao dugc thay the khang sinh trong thuc Sn heo con cai siia. Luan an tie'n si nong nghifp, Dai hgc Nong lam TP. Ho Chi Minh.
13. Yeh H.S., Lin K.J., Chou C K . (2013), Effects of supplemental Chinese traditional herbal medidne complex on the carcass quality of pig.
Journal of Agricultural Studies, 1(2): 141-150.
ANH HLfONG CUA HYDRO-CORTISOL
LEN TI LE GA NOI TRONG D 6 I SAU sfisrf
Lam ThdiHung^' Ngay nhan bai bao: 19/11/2014 - Ngay nhan bai phan bifn: 28/11/2014
Ngay bai bao dupc cha'p nh^n dang: 29/11/2014 TOM TAT
Hai thi nghifm d u p c bo' tri tai Trgi Thyc nghifm chan nuoi - Tnrong D?i hQC Can Tho, tir thang 02/2013 den thang 12/2013, theo kifu hoan toan ngSu nhien voi 6 nghifm thiic tuong ung voi Hydro- cortisol dugc tiem la 0,0; 0,5; 1,0; 1,5; 2,0; 2,5 mg/kg khoi lugng co the ga mai Noi sau khi de 18,5 va 19,5
' Trucmg Dgi hpc Tra Vinh
• Tac gia d^ lien hf: TS. Lam Thai Hung, Trudng Chi nhanh Cau Ngang - Truong Dai hpc Tra Vinh - Khom 4 phu6ng 5, TP Tra Vinh, tinh Tra Vinh. Difn thoai: 0919.026614; E-mail: [email protected]
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