VIEN C H A N N U O I - Tgp chi Khoa hgc Cdng nghe Chdn nudi - So 6 (Thang 6-2007)
• ::. ^ ••"./ ••; - : m i l
NGHIEN CUU QUY TRINH CONG NGHE LEN MEN BA DlfA " ~ \ ! ^
L A M THirc AN CHO BO S 0 A T Nguyin Giang Phiic'*, Le Vdn Huyen' vd Vuong Tudn ThiCc'
'Bp mdn Dinh duomg va thurc an chan nudi; ^Trung tam nghien cii'u bo va dong cd Ba Vi
* Tdc gia de lidn he: ThS. Nguydn Giang Phiie, DT 04.8386126, DD 0984113752
I : • r ' ^ '
ABSTRACT
Study on the ensiled process of pineapple residue for feeding dairy cows
Finding resources of ruminant feed from agro-industrial by-products is very important, because of the economic effects and environmental pollution reduction. Pineapple residue of canning factories is abundant but is spoiled rapidly. The processing pineapple residues by supplementing starch and microorganisms increased storage time of fermented products. After one month of storage, pH and lactic acid content of fermented pineapple residues were 3.90 - 4.10 and 2.90 - 3.05%, respectively. Fermented pineapple residues can successfully replace 35 - 44% of concentrate and 36 - 52% of elephant grass in dairy cattle rations.
DAT VAN DE
Chan nudi bd sira dang dupe dac bidt quan tdm nhdm tirng budc dap irng nhu cau ve sira eho ddi sd'ng va ban ehe nhdp khdu. Tdng dan trau bd eiia ea nude cd bon 8 trieu, trong dd dan bd sira 113.000 eon. Vide san xuat, ehe' bid'n va tao ngudn thirc an eho bd sira ndi ridng va dai gia sue ndi ehung la vide lam trudc mdt eung nhu ldu dai eiia nganh ehan nudi.
Do didn tich bai chan tha va trdng cay thirc an gia siie ngay cang bj thu hep ndn vide sir dung ngudn phu phdm ndng nghidp lam thtic an cho gia siic la mpt trong nhirng giai phap tich cue.
Hang nam d nude ta cd hon 35 trieu tan phu pham ndng nghiep bao gdm rom liia, cay ngd, than la lac, la sdn, ngpn la mia, ngpn la va ba diia (Ld Viet Ly, 2003). Cdy dira dupe trdng nhidu d nude ta, ehii yd'u tap trung d cac viing trung du va mien niii. Didn tich trdng dira la 36541ha, san lupng khoang 291482tan qua va hang tram ngan tan blip ngpn la dii"a va ba ep qua dira. Day la ngudn phu pham rdt tdt eho trau bd, nhung vide thu hoach dira lai ed tinh thdi vu ndn phd' thai thudng khdng dupe chd' bid'n ma thai ra moi trudng gay 6 nhidm. Cong nghidp chd' bid'n qua dira chi thu dupc 25% ehinh pham edn 75% la phu pham phe thai, gia siie sir dung rat ban chd'. San pham chd' bid'n cua phu phdm dira ehii yd'u d dang il ehua chdi ngpn va la diia. Sir cd mat cita cac ehiing vi khudn cd sdn trong tu nhidn hoac dupc bd sung lam eho qua trinh len men didn ra thudn lpi nhd sir phdn giai caebohydrat trong nguyen lieu, tao thanh axit lactic. Ham lupng axit hiru co tang lam ire ehe nam nem, nam mdc va vi sinh vat gay thdi phat trid'n. Do dd thirc an dupe bao quan trong thdi gian dai. Cdng trinh nghidn ciin eiia Nguydn Ba Miii va cs. (2000) da chirng minh rdng: chdi, ngpn va la diia ii ehua da lam tang ty Id tidu boa chdt huu co, vat ehdt kh6,protein. Ty Id tidu boa eiia vd va ba dura ep eao hon chdi va la dira 6,6-7,2% , ham lupng chat beo bay hoi eung eao hon 11,8%.
" '--' •• ' VU CHi CUONG-Sir^cdd-,/i,?(^«„gy(:v,/„wr..
Tuy nhidn ede tac gia trdn ehi tid'n hanh u ehua ed xanh ba diia vdi mudi ma chua ed su tham gia eiia vi sinh vat. Ngay nay vdi su phat trid'n ciia edng nghd sinh hpc. c6ng nghd vi sinh vat da dupe ting dung nhidu trong ehe bid'n thirc an gia sue. Cac eong trinh nghidn ctiu ddu ehung td ldn men vi sinh vat dd bao quan cdc loai thiie an, phe phu phdm da lam tang gia tri dinh dudng eiia ehung, gia siie tidu hoa tdt hon. Tir nhung thuc te dd de tai "Nghien cuu quy trinh cdng nghd ldn men ba dura lam thtic an eho bd sua" dupe thue hidn trong khudn khd de tai cdng ngh? sinh hpc cdp nha nude KC 04-20 giai doan 2003-2005 nhdm: (+) Tao che phdm vi sinh vat bd sung trong ehe bid'n, quy trinh ky thuat, quy md hpp ly dd ldn men ba dira nhdm tao thdm ngudn thtic an thd xanh cho bd sua dp dimg dupc trong cac trang trai, hd ehan nu6i;
(-I-) Xac djnh ty Id thay the san pham ldn men ba dira trong khdu phan an ciia bd sua, danh gia hidu qua kinh te, gia trj sir dung ciia ehiing; (-I-) Chuydn giao e6ng nghd ehe bid'n dd ap dung tdi eae hp chan nuoi bd sua, giam gia thanh thtic an
VAT LIEU v A PHUONG P H A P NGHIEN CUU Npi dung nghien cicu
+ Chpn va nhan gid'ng vi sinh vat tham gia trong qua trinh ldn men ba dira + Quy trinh ldn men ba dira
- Ty Id bd sung gidng vi sinh vat
- Thanh phdn nguydn lieu (ty Id tinh bdt, ba dira), ty Id dm dd- - Thdi gian ldn men
- Thanh phdn hod hpc eiia san pham sau Idn men + Hidu qua sir dung ciia ba dura ldn men cho bd siia
- Ty Id thay the thire an tinh, thd xanh bdng ba dira ldn men trong khdu phdn - Anh hudng eiia thire an ba diia ldn men dd'n nang suat sira
- Tidu tdn thire an/kg sira, gid thanh san phdm.
Phuang phdp nghien cicu
+ Tuyen ehpn va nhan gidng vi sinh vat
- Cac gid'ng nam men, nam mdc, vi khudn dupe thu thdp tir eo sd giir gidng, ngoai tu nhidn. Phan lap va nhan gidng theo phucmg phap vi sinh truyen thdng.
- Nhan gid'ng da ehiing : Tid'n hanh nhan gid'ng nam men va nam spi trudc, sau dd bd sung vi khuan va say khd trong nhiet dp thdp < 60'C, tan thanh bpt lam gid'ng cho qua trinh thi nghidm ldn men ba dira sau nay.
+ Phucmg phap Idn men xdp (ldn men bd mat), sau dd ldn men yd'm khi. Quy m6 10, 100, 1000. 3000kg.
Bang 1: Thanh phdn nguydn lieu dd' ldn men ba dii'a
Ty le nguyen lieu % CY^ CTj CT, Ba qua dira ep tuoi 50 60 70 Bdt sdn khd ' • '•''. " 40 ' • • 30 20
Cam my •• •' . 8 8 8
Gidng vi sinh v^t ' ' " 2 2 _ _ 2 Cdc cha viet ldt: CT,, CT;, CTj chi cdc cong thuc nguyen lieu klidc nhau
VIEN CHAN NUOI - Tgp chi Khoa hgc Cdng nghe Chdn nudi - S6 6 J h a n g 6-2007)
+ Cac phucmg phap phdn tich: Cac thanh phdn hda hpc theo phucmg phap hidn hanh tai phdng phan tich thirc an Vien Chan nudi. Phan tich ede axit hiru c a theo phucmg phap ehung cat phan doan
+ Thir nghiem san pham trdn gia siic: tid'n hanh tai Trung tam nghidn eiru bd va ddng ed Ba Vi (Ha Tay), hd dng Thue Sinh tir thdng 4 dd'n thang7/2003. Hd dng Son, dng Khdnh thi Iran Thai Hod, Nghia Dan, Nghd An (thdng 8-12/2004) .. ,„ [.;„
Chpn bd tbi nghidm, phdn Id so sanh va tid'n hanh ddi Id sau 45 ngay cho an.
Thi nghiem 1 (TNj): Bd cai dang vdt siia 8 eon, liia siia 3-4, thang cho sira 3-5.
Thi nghiem 2 (TNj): Bd cai F, dang vdt siia 16 eon, liia sira 1-2, thang eho sira 3-4 y .]'[
Khdu phdn an eo sd dua tren nguydn lieu sdn ed eiia trang trai (Id ddi chirng - DC) , ^ 'iu^.
Ld thi nghidm thay thd' 50% thiie an thd xanh bdng ba dira ldn men ' ' •• • Cac chi tidu theo ddi: Can lupng thtic an hang ngay; Can lupng sira thu dupe hang ngay;
Tidu tdn thtic an/kg siia; Tinh gia thanh thitc an/kg sira, gia thanh san phdm che bid'n + Xir ly sd lieu thu dupc trdn may vi tinh, chuong trinh minitab 12.
KET QUA v A T H A O LUAN
Tuyen chgn vd nhdn gidng vi sinh vdt
Bd gidng vi sinh vat da dupc thu thdp, phan lap va tuydn chpn 3 gid'ng trong eae gid'ng Nam spi Aspergillus niger cd kha nang phan giai tdt tinh bdt, xenluloza.
Nam men Sacharomycess.sp tham gia phan giai tinh bdt ••• "
Vi khuan Lactobacillus cd kha nang phan giai tinh bdt, protein, xenluloza hidn dang luu giii tai phdng thi nghidm bd mdn Dinh dudng
& T A C N .,, , < '.>
Mdt sd dae tinh phan giai tinh bdt (hay boat tinh enzym amilase), phan giai xenluloza (hay boat tinh enzym xenlulaze) eiia cac ehung vi sinh vat dupe trinh bay trong bang sau
Bang 2 : Hoat tinh phan giai tinh bdt va xenluloza
Chiing VSV D^ (em) Dx (em)
Aspergillus.niger 2,84 2,52 ,-. j . Sacharomycess 1,04 1,42 - > ••
Lactobacillus 3,13 2,44
D,, .• Dudng kinh vong phdn gidi tinh bpt (cm); Dx: DiCdng kinh vdng phdn gidi Carboxymetyl cellulaza ( CMC) (cm) . -• .. ,. :i . i
Nhan gid'ng hdn hpp 2 ehiing tao ra san phdm gid'ng thii cdp diing eho thi nghidm
- Asp.niger + Lactobac. = San pham gid'ng ky hidu VSDD, „. .ui..
- Scha. + Lactobac. = San phdm gid'ng ky hidu VSDD, ••'..
Anh hudng cua thdnh phdn nguyen lieu din sir biin ddi dp pH trong qud trinh len men
Thi nghiem khao nghiem dupe tid'n hanh vdi quy md 10 kg/me trong phdng thi nghiem va
bd tri lam 3 edng thirc khac nhau ve lupng ba diia va tinh bdt bd sung. Nguydn lieu dupe trdn
deu sau dd eho vao tiii nilon nen chat nen chat sau 3-7 ngay md ra Idy mdu phan tich.
• ' • • VO CHi C O O N G - Buac ddu sic dung ky thudt...
Bang 3 : Sir bid'n ddi pH trong qud trinh ldn men ba dira C o n g thiirc che bien
CT, + VSDD, CT2 + VSDD, CT3 + VSDD, CT, + VSDDj CT2 + VSDD2 CT, + VSDDj
BDTN 6,78 6,78 6,80 6,78 6,78 6,80
3 5,21 5,15 5,09 5,16 5,04 4,97
Thdi gian 7 4,66 4,57 4,44 4,46 4,38 4,25
(ngay) 14 4,53 4,42 4,31 4,40 4,30 4,14
21 4.28 4.20 4.09 4.21 4,10 3,87
28 4,14 3.96 3.75 4.02 3.91 3,55 Sir bid'n ddi dp pH trong qua trinh ldn men trong Bang trdn cho thay tdc dp ldn men eiia ba dira rat nhanh, ehi trong 3-4 ngay dp pH da giam edn 5,21-4,97, san pham ed the sir dung eho ehan nudi. Sau 7 ngay da hoan loan "chin sinh hpc" bieu hidn d dp giam eiia pH 4.66-4,25.
Kdi qua nay hoan loan phii hpp vdi nghidn ciin eiia Nguydn Hiru Tao (1996) khi ii ehua trdn than la cay lac. Tuy nhidn tdc dp ldn men eiia ba dira nhanh hem 3-4 ngay so vdi 21 ngay ciia than la cay lac. Vd thdi gian bao quan ba dura ldn men chi sir dung dupc trong 1 thang, sau dd san pham ed miii rdt ehua, gia sue se an it hon vi trong dd lupng axit acetic da tang va sir giam dan eua axit lactic. Trong mdi trudng nay da cd the' ed ndm mdc phat tridn. (Zdc cdng thire ed sir tham gia ciia VSDDj ed tdc dp ldn men nhanh hem VSDD,, bdi sir sinh trudng phat trien eiia ndm men thudng nhanh hem nam mdc va m6i trudng yd'm khi ed thuan lpi hem cho nam men phat trien.
Tir nhung kdi qua trdn , ehiing tdi ehpn edng thire 3 (ba dira 70%, bdt sdn 20% va cam my 8%, men gidng bd sung 2%) de ldn men trong nghidn ciiai thi nghidm nay vi gia thanh san phdm re nhat (896d/kg ba dira da che bid'n), lupng ba dira tuoi dem ii dupc nhieu nhat. Ve gidng vi sinh vat eung chpn VSD,.
Thdnh phdn hod hgc cua bd dda len men
Chi tidu de danh gia chat lupng ii men ndi ehung la thanh phdn boa hpc eiia ehiing it thay ddi trong sudt qua trinh ldn men va bao quan. Ddi vdi ba dura ham lupng dudng dd tan (saecaroza, glueoza, fuetoza, pentoza...) cdn rat nhidu (24-27% trong VCK), vi the vi sinh vat lpi dung ngay de sinh trudng va phat tridn. Dieu nay giai thich vi sao tdc dd ldn men eiia ba dira kha nhanh, nhung thdi gian bao quan edn ban ehe. Sau 4 tudn ham lupng axit acetic da tang hem 100%, vi the san phdm xuat hidn miii chua.
Ham lupng VCK eiia ba dura ldn men giam rat rd ret, nhat la trong tudn dau qua trinh hd hap cua te bao thue vdt edn didn ra, dd la nguydn nhdn gdy mat mat VCK. Mdt sd thanh phan dinh dudng khde cua ba dira nhu protein thd, lipit thd, xo thd trudc va sau cdng thire ii chenh lech nhau khdng ldn. Nhin ehung ham lupng protein thd giam ddn theo thdi gian, nhung xo thd ed chieu hudng tang nhung rat it 18,63- 18,76% VCK. Ham lupng lipit thd ed giam chiit it nhung kh6ng dang ke.
Kdi qua nghien curu eiia ehiing tdi eung phii hpp vdi kdi luan eua Nguydn Ba Miii va es.
(2000) rdng ham lupng VCK va protein thd giam trong qua trinh ii ehua phu phdm dira.
VIEN C H A N NUOI - Tgp chi Khoa hgc Cdng nghe Chdn nudi - So 6 a h a n g 6-2007)
Bang 4 : Mpt so thanh hoa hpc ciia ba diia trudc va sau khi ii Chi lieu
VCK(%)
Protein thd (%VCK) Lipit thd (% VCK) Xa thd (% VCK) Axit lactic (%) Axit acetic (%)
Trudc il 35,89
7,78 3,26 18,63
1 33,38
7,64 3,24 19,67
1,77 1,09
Sau il 2 33,06
7,61 3,20 18,70
2,89 1,31
(tudn) 3 32,97
7,28 3,16 18,72
3,05 2,02
4 31,92
6,94 '' 3,03 18,76
2,92 2,62 Nhdn xet ehung ve chat lupng thirc an
Mae dil bam lucmg nude trong phu phdm dira kha eao, nhung phu phdm diia lai cd ham lupng dudng dd tan cao ndn dd it ehua. Ham lupng protein th6, lipit thd trong phu pham dira tuong ddi thdp do vay can lun y khi xdy dung khdu phan an eho gia siic. Phu pham dira ii chua cd chat lupng tdt, ed mdu vang, miii thom dd chiu.
Kit qud thu nghiem bd dica len men cho bd sda
Ba dira sau khi ldn men ed mau vang tuoi, thom miii rupu, rat hap ddn bd. Thanh phdn dinh dudng da dupe cai thidn dang ke, bd an lidn tue khdng bj rat ludi nhu ba dp qua tuoi.
Khau phdn an eiia Id thi nghidm du kidn thay thd' 50% thiie an xanh bdng ba diia ldn men va 40% ba bia de bao dam lupng eung cap vat chdt khd eho bd tir 10-11 kg/eon/ngay va protein tucmg ducmg nhau.
Bang 5 : Khdu phdn an thuc td' eiia bd thi nghiem
Nguyen lieu Ld DC, Ld TN, % thay the 1 Ld D Q Ld TNj % thay the 2 Ba dira (kg/eon/ngay)
Ba bia (kg/con/ngay) T A tinh HH (kg/eon/ngay) Cd voi (kg/con/ngay) Khoang (g/con/ngay) VCK (kg/con/ngay) Protein thd (g/eon/ngay)
0 6,43 4,76 28,66 25,00 10,67 1372,6
11,43 4,06 3,07 18,17 25,00 10,43 1475,8
36,8 35,5 36,6
0 0 3,28 34,2 9,9 1011,5
13,1 0 1,82 16,8 10,02 1464,7
".!',•••
44,5 52,27 :.
•••• •'•'•'''•'
ThiCc dn tinh HH cho TN,: Cdm my 65%, bpt san 20%, kho dd tuang 8%, bpt xuang 2%, bpt cd man 5%. Protein 1356%.
Thicc dn tinh cho TNj: Cam gao 65%, bpt san 25%, thiicc dn dgm dgc GuoBS 10%, protein trong khdu phdn 11.95%.
Thuc te bd TN, an dupe 11,43 kg/con/ngay da thay the 35% ba bia va 36,6% cd voi hang ngay. Trong thanh phan ba diia ldn men da cd 30% thirc an tinh ndn khau phdn vdn bao dam lupng vat chat khd can thiei cho bd tuong duong Id DC (10,67 va 10,43% VCK/con/ngay).
Trong TNj, (bd F,) ty le thay the ed voi va thiic an tinh cao hon TN,, dat dupc 44,5-52,2%, bd an dupc 13,1 kg ba diia ii/con/ngay vdi ly do thiie an xanh thd d day hid'm vao miia khd, khdng cd ngudn ba bia bd sung trong khau phdn vi xa nha may bia.
• ' - vu CHI C U O N G - Budc ddu sic dung ky thudt...
Bang 6 : Nang suat siia va tidu ton thirc an/kg sira eiia bd thi nghidm
Chi tidu LdDC, L d T N , LdDC:; L d T N ; Nang suat sira ban ddu 9,62 9,61 7,44 7,45 Nang sudt siia (kg/eon/ngay) 9 , 6 3 ' 10,82" 7,46" 8.55' Tidu ton thtic an/kg sua VCK (kg/eon/ngay) U ] 0 9 7 U 2 U 7 _
Protein (g/eon/ngay) 142,50 136,32 135.5 171,3 Cdc gid tri trung binh co cdc chic cdi khac nhau theo hdng ngang khac nhau ddng ke(p<0,01) Vdi ddng vdt tidu boa da ed, thii'c an ldn men se dupe vi sinh vat da ed sir dung ngay dd' tao thanh cac axit beo bay boi (ABBH). Thirc an ldn men tir ba dira dap ung dupc didu dd. Ba dira ehi sau 5-7 ngay ii men da ed the cho bd an dupe, san phdm ed miii thom. Dang ehii y la trong TN2, bd sira d day la eon lai F,, ngudi dan chua cd nhidu kinh nghidm ehan nuoi nen nang suat siia cdn thdp, hon nua khdu phan an rat don didu chit yd'u la ed xanh, bpt sdn va thirc an dam dae.
Ddnh gid hieu qud cua viec len men bd dua
Gia thanh che bid'n va hieu qua sir dung thirc an ba du:a ldn men dupc xem la chi tidu quan trpng de danh gia ky thuat cPng nghe.
Bang 7a: Gid thanh chd' bid'n Idn men ba dira (tai Ba Vi, 2003) (Dan vi: ddng) Chi tidu
Mua & van chuyen ba dira Bdt sdn
Cam my Gid'ng men Tiii nilon ii Cdng lao ddng Tdng edng
Gid thanh/1kg san pham
Bang 7b : Gid thanh ehe bid'n ldn Chi tidu
Mua & van chuyen ba diia Bdt sdn
Gidng men Tiii nilon ii Cong lao dpng Tdng edng
Gia thanh/Ikg san pham
Dem vj Kg Kg Kg Kg M Cdng ddng
Sd lupng 2.500
715 285 20 20 5 3520
men ba diia (tai Nghia Dan, Don vi
Kg Kg Kg M Cdng ddng
Sd lupng 2.000
750 20 20 5 2770
Don gia 300 1.800 2.400 10.000 10.000 40.000 1.100*
Thanh tien 750.000 1287.000
684.000 200.000 200.000 200.000 3321.000
Nghd An 2004) (Dem vj: dong) Don gia
200 1.500 10.000 10.000 30.000 820*
Thanh tidn 400.000 1050.000
200.000 200.000 150.000 2000.000
;. * Ty le hao hut chdt kho Id 12%
Trong chan nuOi chi tidu cudi ciing ngudi ta quan tam la hieu qua kinh te bao gdm cac khoan thu chi ma nhieu hon ca la chi phi ve thirc an. Tai thi nghiem nay chiing toi da sir dung ba diia len men Uong khau phdn de" thay the mpt phdn thiic an tho xanh va giam tien thuc an tinh bdi ngay trong san
27.075 9,63
,
2.811
29785 10,82 12,25 2.755
20230 7,46 2711
21312 8,55 14,61 2492
VIEN CHAN NUOI - Tgp chi Khoa hgc Cdng nghi Chdn nudi - So 6 Chang 6-2007) phdm len men da cd tinh bpt bd sung (30%). Kd't qua trinh bay trong Bang 8, d day chi tinh chi phi tien thirc an cho viec san xuat sira cita bd. ^ , _ "Bang 8 : Hidu qua kinh te ciia vide sir dung ba dira Idn men eho bd sira
Chi tidu LdDC, L d T N , Ld DC:; L d T N ; Chi T A eho SX sira (d/con/ngay)
Nang sua't siia (kg/con/ngay) Ty le tang sira (%)
Chi phi TA/lkg siia (ddng)
Tir cac kd't qua trdn cho thay: Sir dung ba dira ldn men trong khau phdn an ciia bd siia da thay the dupe 36,6% ed voi, 35,6% thirc an tinh va 36,8% ba bia ma nang suat sira tang hon 12,25% so vdi Id ddi chiing d thi nghidm 1. Trong dieu kidn viing ehan nudi bd sira Nghia Dan Nghd An thi vide chd' bid'n ba dira it men cang ed y nghia vi rdng d day gdn viing nguydn lieu bdt sdn va nha may chd' bid'n diia, gia nguydn lieu chd' bid'n thap, giam ehi phi van chuyen.
Trong miia kh6 khde nghiet. ed voi va cay ngd khdng trdng dupc thi ba diia ii la thtic an tdt nhat de duy tri dan bd. " ••• ' ^- »• • \'' '''"^ -U:A^
Quy trinh len men che bien hd dica . ' . + Chudn bj gid'ng vi sinh vdt 2 chung phdi hpp : Nam mdc ldn men be mat; Vi khuan ldn men thd' djch
-I- Trdn deu nguydn lieu: Ba dira, cam gao / bdt sdn (ty Id 70: 30); Gidng men bd sung 2%
+ Nen chat, u: (3 each):
- Trong tiii nilon / bao tai ( 20-lOOkg/me); ns - .:•,>]
- Trong bjeh nilon khd ldn dudng kinh Im ( 300-lOOOkg/me);
- Trong hd ii ( 3m x 2m x Im), ehe nilon kin bao dam yd'm khi va phii ddt ldn trdn (2000- 3000kg/me)
-I- Thdi gian ii: 3-5 ngay, Idy ra eho gia sue an ddn. Chii y: sau khi lay thire an ii phai che day that kin tranh san phdm ii tid'p xiic vdi khdng khi se cd mau den. Ne'u ii trong ede bao tai nhd ndn tinh toan sd lupng vira dii cho I bira an hoae 1 ngay an eiia dan bd.
KET L U A N v A DE NGHI , ,. „
-)- Len men phdi hpp 2 chiing nam mdc Asp. niger va vi khuan Lactobacillus tao ehe' pham ban ddu de' ehe' bie'n ba diia uhe' thai nhd hoat tinh phdn giai tinh bdt va xenluloza cao eiia chiing.
+ Ba diia phe thai Tupc Idn men vi sinh vat, it trong 5-7 ngay cd chat lupng tdt, miii thcmn dd chiu, pH <4.5 va bao quan 30 ngay sau u.
-I- Bd sita dupc sir dung thtic an ba diia ldn men 11,43-13.1 kg/eon/ngay thay the 36,6- 52% cd voi, 35,5% thirc an tinh, 36,8% ba bia trong khdu phdn, nang suat sira cao hon 12,25- 14,6% so vdi ddi chirng, gia thanh thirc an dd san xuat 1 kg sira thdp hem 56 ddng/kg- 219 ddng/kg. Gia siie tidu hod tdt, khoe manh.
+ Quy trinh ehe' bie'n dem gian dd lam, dd dp dung vdi quy md 300-5000kg/me, dp dung eho cac quy md chdn nudi khae nhau.
-I- De tai can tid'p tue san xuat thir nghiem nhdm xac djnh hieu qua thay thd' 50-100% ba dira Idn men cho bd siia va bd nudi thjt trong vu ddng, ddng thdi phd bid'n rdng rai tdi cac hd chan nudi thdng qua tap huan ky thuat, thdng tin tuydn truydn... nhdm tan dung tdt hem ngudn phe phu pham edng ndng nghidp lam thiirc an cho gia sue.
("OX-d Qr:t. VU C H I C L / O N G - Budc dau sic dung ky thudt...
TAI LIEU
THAM
KHAONguyin Ba Mui. Cu Xuan Din va VQ Duy Giang. 2000. Ti le tiSu hoa da co cac chat dinh duong ciia phu phim dua va anh huong ciia no den trao dOi chat. Bao cao khoa hoc chan nuoi thii y 1999-2000. phan Dinh duong TAGS (Trang 41).
Nguyin Huu Tao. 1996. Nghien curu che bie'n, dir trir than la lac bang phucmg phap u chua lam thurc an cho bo sua va lcm thit. Luin an Pho tien si khoa hpc Nong nghiep.
Le Viei Ly. 2003. Phat trie'n cay thuc an xanh - Mot nhiem vu chien luoc ciia nganh chan nuoi. Hoi thao chien luge nghien ciai dinh du&ng va TAGS. Ha Noi, 5/2003./.
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