D I N H D U O N G VA THU'C A N C H A N N U O I
TAI LIEU THAM KHAO probiotic dum dang che'pham Fubon vao khau phan . " „ . , , , ^ . . , cho lgn con theo me va sau cai sua Tap chi KHKT Chan 1 Le Van An, Nguyen Thi Loc, Nguyen Mmh Huong j . ^ ^ ; 225 40
vi Nguym Thi Thu Ttrng (2017) Ngh.ln a h . s« , ^^ .^^ Nhung, Ding Vi Ho, va Biu Vin Dinh dvng che ph.m prob.olK (Baallu, suUilis v . »rt.l,»a» p019). BS sung chfphSm Ihio du,c vio khfc phan an
«. ptaMra™) trong khau phan Ihuc an nuo, l>w giai ^ „ , ^ , „ , p o , , , ^^ ^,,j ^H^^^. ^.^J^ „„i,i^243(4) an sau rai sua va mini tViit Tan rhi K H r M WAno ^ ' 1- , v / doan sau cai sua va nuoi thit Tap chi KHCN Nong
nghiep, 1(2). 209-16.
Cos P., A.J. Vlietinck, D.V. Berghe and L. Maes (2006).
Anh-infective potential of natural products. How to develop a stronger in vitro 'proof of concept'. J
20-25
NRC (1998). Nutrients requirements of pigs. National Research Council, Academy Press Washington, DC, Papatsiros V.G., Tzika E.D., Papaioannou D.S., Alexopoulos C, Tassis P.D. and Kyriakis S.C. (2009) Ethnopharmacol, 106(3), 290-02. rtjcAupuuius v,., '•
'^ ' v/ Effect of origanum vulgans and allium sativum extracts 3 Bui Van Duih va Dang Thiiy Nhung (2015) Tac dong for the control of proliferative enteropathy in weaning
cua viec bo sung che pham Ien men lactic (Kulactic) vao pigs. Polish J. Vet. Sci,, 12(3). 407-14.
khau phan lon con tap an va cai sua, Tap chi KHCN jo. uj^g ^ i n h Phuoc (2010) Nghien ahi ung dyng mot Ctian nuoi, 2' 52-58. gg che'pham axit hiJu co, probiotic, thao duoc thay the 4 La Van Kinh (2012). Nghien cuu mot so che pham co khang sinh trong thuc an heo con cai sua. Luan an Tieh si nguon goc thao dupc trong chan nuoi lgn va gia cam Nong nghiep, Truong DH Nong Lam TR Ho Chi Minh Bao cao nghiem thu tai Vien Khoa hoc KI thuat Nong u . Tung CM. and Pettigrew J E. (2006) Cntical review nghiep mien Nam, 26/3/2012 of acidifiers. NaHonal Pork Board, Available at. http://
5 D^ng Thiiy Nhung va Do Thi Nga (2013) Bo sung www pork org/ Documents/PorkScience /ReviewOfA- che pham Bacillus enzyme (ProbioUc) cho lon con lai ddifiers.pdf. Accessed 10 April 2009 .
Landrace x Yorkshire tu tap an deh 56 ngay tuoi. Tap n . Seyyedneiad S.M. and Motamedi H. (2010). A review ehi KHCN Chan nuoi, 4 10-16 on Native medicmal Plant m Khuzestan, Iran with 6 Dang Thiiy Nhung va Doan Van So^n (2017) Bo sung Antibacterial properties Inf. J. Phar, 6, 551-60.
ANH H l / d N G CUA TY LE LYSINE TIEU HOA/ME DEN SINH TRLfdNG, DAY MCH LLfNG, TUOI THANH THUC SINH DUG VA HIEU QUA sif DUNG THLfC AN DOI v 6 l LON CAl HAU BI LVN
Trinh Hong San'*, Pham Duy Phdm'^, Nguyen Thi Huong^ vd Tran Thi Bich Nggc^
N g a y n h a n bai bao: 02/01/2020 - N g a y n h a n bai p h a n bien: 05/02/2020 N g a y bai b a o d u o c c h a p n h a n d a n g : 08/02/2020
T O M TAT
Nghien cmi a n h h u o n g ciia ti Ie Lysine tieu hoa/ME den kha n a n g sinh trirong, day m o lung, tuoi thanh thuc sinh due va hieu qua su d u n g thiic an doi voi lon cai hau bi LVN nuoi tai Tnong tam Nghien cuu lgn Thuy P h u o n g tu' thang 6 deh thang 12 nam 2019. Nghien cuu duoc tieh h a n h tren 90 lon cai h a u bi LVN, chia thanh 2 giai doan thi nghiem, giai doan t u 50 kg den 80 kg va giai doan tit 81 kg de'n khi phoi gio'ng lah dau, moi giai d o a n deu bo tri 3 m u c voi ti Ie Lysme heu hoa/
ME bang 95% NRC, 100% N R C va 105% NRC. M6i m u c Lysme bo tri 30 con/muc, chia thanh 3 Ian l | p lai, moi lan thi nghiem 10 con Ke't qua nghien ciiu cho tha'y, voi ty le Lysine m u c 95% NRC, 100% NRC va 105% NRC, tang khoi luong giai d o a n 50-80kg la 895,29; 877,38 va 879,88 g/ngay giai doan 81kg deh phoi gio'ng lan d a u la 557,06; 572,37 va 570,20 g/ngay Voi ty le Lysine tu'ong ung, day m o lung tai thoi diem 80kg la 11,40; 11,60; 11,70mm, tai thoi diem pho'i giong la 15,30; 15,20;
15,20mm. Tuoi dong due lan d a u t u o n g u n g voi cac m u c Lysme la 181,80,183,90 va 184,60 ngay. He so chuyen hoa thiic an vol miic Lysine t u o n g iing giai doan 50-80kg la 2,30; 2,31; 2,36kg va 81kg den phoi giong lan dau la 2,93; 2,91 va 2,91kg. N h u vay, ty le Lysine tieu hoa/ME trong khau phan an cua lgn cai h a u bi LVN da khong anh h u o n g de'n to'c do sinh truong, day m o l u n g va he so chuyeii hoa thiic an n h u n g anh h u o n g de'n tuoi d o n g due va phoi gio'ng lan dau.
Til' khoa' Ty le Lysine tieu hoa/ME, chuyen hod thuc dn, lan LVN.
' Tnmg tam Nghien cuu \<?n Thuy Phuong
^ Vien Chan nuoi
* Tac gia lien he: TS Trinh Hong Son, Trung tam nghien cuu lgn Thuy Phucmg, Vien Chan nuoi; DT' 0912792872, Email* [email protected]
KHKT Chdn nuoi s6 256 - thdng 4 ndm 2020 47
DINH DirONG VA THUC AN C11A]1NUQJ
ABSTRACT
Affected of digestible lysine/ME fo growth performance, backfat thickness, maturity an feed efficiency in gilt LVN pigs
This study was conducted at Thuy Phuong Pig research and development center to '^^^^^'"^"1 the affected of digestible lysine/ME to growth performance, backfat thickness, maturity and tee efficiency m gilt LVN pigs from June to December in 2019. The data was collected from a total of 9U gilts LVN in two different stages which the first stage was from 50kg to 80kg and the second stage was from 81kg to the first time mated. Each stage was fed with three different digestible iysine/Mb 95% NRC, 100% NRC and 105% NRC. Within a lysine level, there were 30 gilts in triple repeated with 10 pigs per repetihon The results showed that average daily gain for gilts in 95%NRC, 100%
NRC, and 105% NRC lysine levels for the first stage were 895 29, 877.38, and 879 88 g/d and for the second stage were 557.06, 572.37, and 570.20 g/d. With that order of lysine, the backfat thickness at 80kg was 11.40, 11.60, and U.70mm, and those on the first time mated were 15.3, 15.20, and 15,20mm The age of the first estrus at a similar lysine order was 181.80, 183.90, and 184.60 days Tlie feed conversion ratio for the first stage was 2.30, 2.31, and 2.36 kg and for the second stage were 2.93, 2.91, and 2.91 kg. Overall, the digestible lysme/ME levels in the gilt pigs' diets were not effected growth performance, backfat thickness, feed conversion ratio as well as the age of the first estrus and age of the first mating.
Keywords: Digestible lysme/ME, feed conversion ratio, LVN pigs.
I.BATVANDE
T h e o P i g C H A M P (2013), h a n g n a m k h o a n g 5 4 % lgn n a i d u g c loai thai, t r o n g d o l o n cat h a u bi v a l g n n a i 1 liia d e chie'm ty le loai thai l o n nha't. Vi vay, c h a n n u o i l g n h a u bi d i i n g each co t a m q u a n t r p n g s o n g c o n t r o n g viec toi d a h o a n a n g sua't sinh s a n va k e o d a i v o n g d o i c u a Ign n a i . K h a u p h a n a n c u a l g n cai h a u bi t h u d n g d u o c x a y d u n g t h u a m i i c axit a m i n v a cac cha't d i n h d u o n g k h a c n h a m t a n g to'i d a tich l u y p r o t e i n {Rozeboom, 1999).
T u y n h i e n , t h e o S t a l d e r (2007), chia k h o a t h a n h c o n g t r o n g c h a n n u o i lgn cai h a u bi co t h e la l a m g i a m s u tich lijy p r o t e i n va t a n g SU' d u trii' m o . D u t r i i m o co the d u g c d i e u k h i e n b a n g e a c h t h a y d o i I u g n g axit a m i n a n v a o ( R o z e b o o m , 2007). K h a u p h a n a n thieii axit a m i n d a h a n c h e ' s u p h a t trien m o n a c v a t a n g s u t i c h liiy m o ( V o e r m a n s v a ctv, 1994;
Kitt, 2010). Trai lai, n a n g l u g n g a n v a o c6 t h e c u n g a n h h u o n g de'n t y Ie tich luy giiia m o v a p r o t e i n 6 Ign (De Greef, 1992). B a i d o o (2001) c h o r a n g k h a u p h a n a n p h i i h o p c h o I g n cai h a u bi CO t h e la m i i c l y s i n e t r u n g b m h (0,6%) v a i m u c n a n g I u g n g cao (3,5 M c a k / k g ) h o a c m i i c Lysine cao (1,31%) v o i m i i c n a n g l u g n g t r u n g b i n h (3,2 M c a l / k g ) , va tac gia c u n g
k h u y e n cao h a n che' l u g n g thiic an an v a o h a n g n g a y cua lgn cai h a u bi.
C h e ' d p nuoi d u o n g han che'thu'dng x u y e n d u g c a p d u n g trong thai ky mang thai k h o n g cho p h e p p h u c hoi d u trii lu'ong nac va m o c o the a chu ky d e hep theo. Dieu nay t h u c s u co hai doi voi lgn h a u bi, vi chiing co l u o n g d u trii CO the t h a p h o n va lugng thiic an an vao tha'p h o n 20% trong thoi gian tiet sua so voi Ign n a i d e n h i e u liia (Young va ctv, 2005), boi vay c h u n g can t h e m n a n g Iugng de dat d u g c toe d p s i n h tru'ong toi u u . N h u vay chien luge nuoi d u o n g lon cai h a u bi can phai duoc quan tam x e m xet n h S m d a p i i n g n h u cau thiic an d i o e h u n g .
Voi n h u n g ly do tren, nghien ciiu n a y d u o c trien khai nhSm xac d i n h ty le L y s i n e Heu h o a / M E n a n g l u o n g trao doi ( L y s T H / M E ) thich h g p t r o n g khau phan an cua lgn cai h a u hi g i o n g LVN.
2. KAT UEU VA PHIfflNG PHAP NGHIEN CtlU 2.1. V a i lieu, dia diem va t h o i g i a n
Thi n g h i e m d u g c trien khai I . . -JO l o n h a u bi g i o n g LVN (Landrace P h a p >, I. , d r a c e M y ) CO khoi l u o n g (KL) t r u n g b i n h 50±3kg tai T r u n g t a m N C lon T h u y P h u o n f li, than J
6/2019-1/2019. ^
KHKT Chdn nuoi so 256 - thdng 'I a am 2020
DINH D U O N G VA THLfC AN CHAN NUOI
2.2. Phuang phap
2.2.1. Bo^tri thi nghiemThi nghiem (TN) duge thie't ke' theo phuong phap hoan toan ngau nhien 1 nhan to', vol 3 miic ty Ie Lysme tieu hoa (LysTH)/nang luong trao doi (ME), moi miic la mot nghiem thiic (NT), moi NT gom 30 con, 10 con/Ian lap lai. Cac NT bao gom:
NTl: ty le LysTH/ME trong khau phan bing 95% so voi khuyen cao NRC (1998) doi voi Ion cai hau bi co toe dp tang truong mo nac 325 g/ngay;
NT2: ty Ie LysTH/ME trong khau phan bing 100% so vol NRC (1998) dpi voi Ign cai hgu bi CO to'c do tang trudng mo nac 325 g/ngay;
NT3: ty Ie LysTH/ME trong khau phan bSng 105% so voi NRC (1998) doi voi Ign cai hau bi CO to'c dp tang truong mo nac 325g/ngay.
Tong so' Ign TN/NT: 30 eon; so Ipn/lan lap lai: 10 con; so lan lap lai/NT: 3 lan. Lon TN dupc bo tri dong deu giiia eae 16 ve khoi Iugng (KL), nguon go'e va ehe' dp cham soc nuoi duong.
Thiic an dugc pho'i tron dua tren cac nguon nguyen lieu nhu ngo, cam gao, kho do tuong,... Cac chi tieu dinh duong nhu' protein tho, ME, Ca, P, xo tho dupe can do'i giiia cac khau phan theo khuyen cao ciia NRC (1998).
Thanh phan dinh duong cua thiic an TN dupe trinh bay o bang 1.
Bang 1. Thanh phan dinh duong ciia thiic an thi nghiem cho Ign cai hau bi theo giai doan Giai doan 50-80kgGiai doan 81-120kg
NTl NT2 NT3 NTl NT2 NT3 Npi dung
ME (Kcal/kg) 3.265 3.265 3.265 3 265 3.265 3.265 Protein tho (%) 16,3 16,3 16,3 13,8 13,8 13,8 Ca(%) 0,75 0,75 0,75 0,60 0,60 0,60 Pdehapthu(%) 0,35 0,35 0,35 0,30 0,30 0,30 Lysine tieu hoa (%)* 0,67 0,71 0,74 0,52 0,56 0,58 LysTH/ME (g/Mcal) 2,06 2,17 2,28 1,60 1,68 1,76 Ghi chu: Lysine tieu hoa hoi trdng tieu chuan 2.2.2. Thu thap solieu vecdc chi tieu theo doi
Thiic an thi nghiem sau khi phoi tron dugc lay mau va phan tich cac chi tieu protein
tho, xo tho, Ca va P theo AOAC (1990); Lugng thiic an dua vao va thiic an thua duoc ghi chep hang ngay de tinh toan lupng thiie an an vao hang ngay, he so chuye'n hoa thiic an;
Day mo lung dugc do qua cac giai doan sinh truong. Cac chi theo doi: khoi lugng bat dau (KLBD), kho'i lugng ke't thiic giai doan 50- 80kg (KLKTGD 50-80kg), tang khoi lupng g/con/ngay giai doan 50-80kg (TKLGD 50- 80kg), tang khoi lupng g/eon/ngay giai doan 81kg de'n pho'i gio'ng Ian dau (TKLGD 81kg- PGLD), tang kho'i Iugng g/con/ngay giai doan 50kg den phoi giong lan dau (TKLGD 50kg- PGLD), Uioi thoi diem dat 80kg (TTDD 80kg), tuoi dgng due lan dau (TDDLD), kho'i lugng dong due Ian dau (KLDDLD), tuoi pho'i giong Ian dau (TDDLD), khoi lupng pho'i gio'ng lan dau (KLPGLD), day md lung tai thoi diem 80kg (DML-80kg), day mo lung tai thoi diem phoi gidng lan dau (DML-PGLD).
2.3. Xu ly so lieu
Sd' lieu duoc thu thap theo gia tri trung binh ciia tung NT va dupe xu Iy thd'ng ke theo phuong phap phan tich phuang sai (ANOVA) tren phan mem minitab 16 (2012).
3. KET QUA VA THAO LUAN
3.1. Anh hudng ciia ty le LysTH/ME den sinh truong, day ma Itmg va tuoi thanh thuc sinh due
Dmh duong cho lon cai hau bi la ITnh vuc de'n nay van con nhieu tranh luan, tuy nhien nuoi dudng Ipn cai hau bi de dat dugc tot nang sua't sinh san Iiia dau va keo dai vong doi Ign nai luon la chia khoa thanh cdng. Ty Ie LysTH/ME thich hpp cho lpn cai hau bi LVN de'n sinh trudng, day md lung (DML) va tuoi thanh thuc sinh due dugc trinh bay d bang 2.
Ke't qua bang 2 cho tha'y KL Ipn cai hau bi tai thdi diem ket thiic giai doan 50-80kg va phdi giong Ian dau khong cd su sai khac giua eac NT (P>0,05), trong khi dd Ign cai hau bi tai thdi diem dgng due lan dau 6 NT 100%NRC cd KL Idn hon so vdi NT 95%NRC va 105%.NRC (P<0,0001). Tang kho'i lugng trung binh hang ngay (TKL) ciia lgn cai hau bi giai doan 50-
KHKT Chdn nuoi so 256 - thdng 4 ndm 2020
DINH DU'ONG VA T H U C AN CiJANNUQI
80kg; 80kg de'n P G L D v a tinh c h u n g c h o ca T N Ian l u g t la 877,38-895,29g; 557,06-572,37g v a 646,47-661,98g. T u y n h i e n , ty le L y s T H / M E t r o n g k h a u p h a n k h o n g a n h h u d n g de'n TKL d tat ca cae giai d o a n n u d i Ign cai h a u bi (P>0,05).
T h e o Bao eao td'ng k e t ciia Tran Thi Bieh N g g c (2014), v d i m i i c L y s T H / M E t r o n g k h a u p h a n la 2,17 g/Mcal d giai d o a n 50-80kg v a 1,68 g / Meal d giai d o a n 80kg de'n phd'i g i o n g lan d a u , TKL d giai d o a n 50-80kg d a o d g n g hi' 549,1 de'n 740,9g; d giai d o a n 80kg de'n pho'i gid'ng Ian d a u d a o d g n g t u 555,4 d e n 663,8g v a t i n h c h u n g c h o ca T N tir 50kg de'n phd'i gid'ng I a n
B a n g 2. A n h h u c m g ciia ty 1^ LysTH/ME t r o n g t u o i t h a n h t h u c s i n h due
d a u d a o d p n g tir 556 d e n 698 g/con/ngay N h u v a y T K L c u a l g n cai h a u bi d giai doan 50-80kg v a 80kg d e n phd'i g i o n g lan d a u trong n g h i e n ciiu n a y k h a c v d i nghien ciiu Tran Thi Bich N g g c (2014), t r o n g k h i do TKL dnh chung c h o ca giai d o a n tii' 50kg d e n phoi giong Ian d a u t r o n g n g h i e n a i u ciia chiing toi n a m t r o n g k h o a n g n g h i e n ciiu ciia Tran Thi Bich N g p c (2014). S o di, k e t qua co s u khac n h a u n h u v a y ed t h e d o s u k h a e nhau ve cac c h a m sdc, n u d i d u o n g c u n g n h u n g u o n gen lon L a n d r a c e v a Yorkshire g i u a hai nghien ciiu noi tren.
k h a u p h a n a n d e n sinh truang, day m a l u n g v a d o i v a i lgn cai h a u b i LVN
LysTH/ME (g/Mcal, n-3) KLBD (kg)
KLKTGD 50-80kg (kg) KLDDLD (kg) KLPGLD (kg) TKLGD 50-80kg (g/ngay) TKLGD 81kg-PGLD (g/ngay) TKLGD 50kg-PGLD (g/ngay) TTDD 80kg (ngay) TDDLD (ngay) TPGLD (ngay) DML-80kg (mm) DML-PGLD (mm)
105,77^
135,13 895,29 557,06 646,47 125,00' 181,80^
221,90=
11,40 15,3Q
80,77 111,07'' 136,03 877,38 572,37 656,52 127,101' 183,90'- 223,60'' 11,60 15,20
49,37 81,90 108,33' 136,30 879,88 570,20 661,98 129,00=
184,60"
223,50*' 11,70 15,20
0,56 0,46 0,42 0,42 12,13 7,80 4,97 0,53 0,49 0,51 0,23 0,22
0,17 0,22
<0,01 0,13 0,53 0,33 0,09
<0,01
<0,01 0,02 0,63 0,94 Ghi chit: Cdc gid tri Mean trong ciing hang mang cac chd
Mpt so'nghien eiiu chi ra rang neu lgn cai hau bi dat dp tuoi thanh thuc sdm, nang suat sinh san va vong ddi ciia Ign nai eo the duac eai thien (Chapman va etv, 1978; LeCozIer va ctv, 1998; Knauer va etv, 2010; Saito va ctv, 2011;
Tart va ctv, 2013). Viec cung cap dii cha't dinh dudng trong giai doan sinh trudng cho Ign cai hau bi la ra't can thie't cho ca qua trinh sinh san ciia lon nai (Klindt va cty 1999). Trong nghien eiiu nay, tang ty Ie LysTH/ME da cd tac ddng den hidi thanh thuc smh due ciia Ign cai hau bi (P<0,05), cu thela tud'i dat 80kg, Uioi ddng due Ian dau va tudi phd'i gid'ng lan dau thap nhat d NT 95%NRC, tiep den la NT 100%NRC va cao nhat d NT 105%NRC. Khac vdi ket qua nghien ciJii nay, nghien ciiu ciia Calderon Diaz va etv (2017) va Tran Thi Bich Nggc (2019) cho bie't
cdi khac nhau thi sai khde co y nghia thdng ke (P<0,05) nhdm Ipn cai hau bi dugc an khau phan co ty le LysTH/ME cao va trung binh cd hidi thanh thuc sinh due sdm hon so vdi nhdm Ign an khau phan cd ty le LysTH/ME tha'p, ke\ qua nay dugc giai thich la cd kha nang lien quan den tdc sinh h-udng, vi khi lgn eai hau bi duoc an miic lysine cao co TKL ldn hon. Dieu nay phii hgp vdi nhimg bao cao trudc day, khi ma Ipn^ eai hau bi co toe do sinh trudng Idn hon thi tudi dgng due la'n dau sdm hon (Hutchens va ctv, 1981; Rydhmer va ctv, 1992; Kummer va ctv, 2009; Tran Thi Bich Ngoc, 2014, 2f ^ 19) Tuy nliien, ket qua d nghien ciiu hien tai khong tuan theo quy luat nay mac du toe do sinh trudng d giai doan SOkg-phoi gidng Ian dau va tinh ehung hf 50kg deh phd'i gid'ng ISn dau cd xu hudng tang khi ty le LysTH tfing.
50
KHKT Chdn nudi so 256 - thdng 4 ndm 2020DINH DLTONG VA THU'C AN CHAN NUOI
D a y m d l u n g ( D M L ) k h d n g n h i i n g la chi s o q u a n t r o n g d o i v d i Ign n a i n u d i c o n m a e o n q u a n t r g n g dd'i v d i ea l p n cai h a u bi n h S m d i e u c h i n h k h o i l u p n g c o t h e k h d n g q u a g a y h o a c q u a b e o . D a y m o l u n g e u a l g n cai h a u bi tai t h d i d i e m phd'i gid'ng l a n d a u d a o d d n g til 15,2 d e h 1 5 , 3 m m v a k h d n g bi a n h h u d n g b d i ty I | L y s T H / M E t r o n g k h a u p h a n . Trai v d i ke't q u a n g h i e n c i i u h i e n tai, T r a n T h i Bich N g p c (2019) d a ehi r a r a n g m i i e L y s T H / M E t r o n g k h a u p h a n a n h h u d n g d e h D M L tai t h d i d i e m p h d i gid'ng Ian d a u , v d i gia t r i e a o nha't d n h d m I p n a n k h a u p h a n cd m i i c L y s T H / M E eao, he'p d e h la n h d m Ign d u g c c h o a n 6 m i i c Bang 3. A n h h u d n g ciia ty le L y s T H / M E t r o n g v d i l g n cai
t r u n g b i n h , t h a p nha't d n h o m l g n c h o a n d m i i c t h a p ; gia tri n a y d a o d d n g tii' 15,86 d e h 1 7 , 2 2 m m . N g h i e n c i i n ciia C a l d e r o n D i a z v a c t v (2017) c u n g c h o t h a y t a n g t y Ie L y s T H / M E d a I a m t a n g D M L c u a Ign eai h a u bi, v d i m i i c t a n g tii 16 de'n 19 m m . S u k h a c n h a u v e D M L giiia n g h i e n e i i u h i e n tai va n h u n g n g h i e n c i i u t r u d c d a y co t h e la d o che' d o c h a m s d c n u d i d u d n g k h a c n h a u va d o gid'ng I p n v a n g u o n g d c gid'ng Ipn k h a c n h a u .
3.2. A n h H u a n g ciia t y l e L y s T H / M E t r o n g k h a u p h a n a n d e n h i e u q u a s i i d u n g t h u c a n d o i v a i l g n cai h a u b i L V N
k h a u p h a n a n d e n h i e u q u a s u d u n g thiic a n d o i h a u b i LVN
Chi tieu LysTH/ME (g/Mcal, n=3)
95% NRC 100% NRC 105% NRC SEM
Lu'ijmg thuc an an vao (kg/con/ngay)
Lu'i;mg Protein an vao (g/con/ngay)
Luong LysTH an vao (g/con/ngay)
Lugng ME an vao (Kcal/con/ngay) He so chuyen hoa thiic an (kg TA/kg TKL)
50-80kg 80kg-PGLD 50kg-PGLD 50-80kg 80kg-PGLD 50kg-PGLD 50-80kg 80kg-PGLD 50kg-PGLD 50-80kg 80kg-PGLD 50kg-PGLD 50-80kg 80kg-PGLD 50kg-PGLD
2,05 1,62 1.74 334,58 223,92 253,09 13,81a 8,47a 9,88a 6.701,83 5.297,81 5.665,91 2,30 2,93 2,69
2,03 1,66 1,76 330,11 229,01 256,59 14,38a 9,13b 10,56b 6 612,40 5 418,34 5 742,67 2,31 2,91
2,07 1,65 1,77 337,57 228,21 258,85 15,41b 9,51c 11,16c 6.761,84 5,259,28 5 679,88 2,36 2,91 2,68
0,03 0,02 0,02 4,86 2,28 2,26 0,22 0,09 0,10 97,25 94,65 74,59 0,03 0,04 0,02
0,55 0,24 0,26 0,55 0,24 0,20
<0,01
<aoi
<0,01 0,55 0,47 0.74 0,31 0,93 0,94 L u g n g t h i i c a n a n v a o , l u o n g p r o t e i n v a
M E a n v a o ciia Ign cai h a u bi k h d n g cd s u k h a c n h a u giiia cac k h a u p h a n cd ty Ie L y s T H / M E k h a c n h a u (P>0,05). L u o n g t h i i c a n a n v a o ciia Ign cai h a u b i d giai d o a n 50-80kg, 8 0 k g d e h D D L D va ca T N lan l u g t la 2,03-2,07; 1,62-1,65 va 1,74-1,77 k g / c o n / n g a y . Ke't q u a n g h i e n ciiu ciia Tran Thi Bich N g g c (2014) c h o tha'y l g n cai h a u bi d giai d o a n 50 k g d e n D D L D , h i D D L D d e h P G L D v a t i n h tii 5 0 k g de'n P G L D d u g c a n t u o n g u n g la 2,58-2,63; 2,86-2,91 va 2 , 7 1 - 2,79 k g / c o n / n g a y . T u o n g t u , n g h i e n cuxi ciia Tran T h i Bich N g p c (2019) d a ket l u a n r a n g I u g n g t h i i c a n t i e u t h u h a n g n g a y d giai d o a n 30-60kg va 6 0 k g d e n D D L D v a tii D D L D d e h P G L D d u g c a n Ian l u g t la 1,81-1,87; 2,53-2,58
v a 2,96-3,03 k g / c o n / n g a y . T h e o k h u y e n c a o ciia N R C (1998), l g n cai h a u bi d giai d o a n 50-80kg v a 80-120kg d u g c a n t u o n g l i n g la 2,4 v a 2,87 k g / c o n / n g a y ; c d n t h e o k h u y e ' n eao eiia N R C (2012) I p n cai h a u bi g giai d o a n 50-75; 75-100 v a 100-135kg d u g c a n t u o n g i i n g la 2,12; 2,52 v a 2,84 k g / c p n / n g a y . N h u v a y l u o n g t h i i e a n a n v a o ciia l g n cai h a u bi t r o n g n g h i e n c i i u n a y tha'p h o n s o v d i ke't q u a n g h i e n c i i u ciia T r a n Thi Bich N g g c (2014,2019) v a k h u y e n c a o c u a N R C (1998, 2012). D i e u n a y cd t h e d u p c giai t h i c h la d o c h e ' d p a n c u a l g n eai h a u bi d n g h i e n e i i u h i e n tai la a n h a n c h e , c d n c h e d o a n ciia Ipn cai h a u bi d n g h i e n ciiu ciia T r a n T h i Bich N g o c (2014, 2019) v a k h u y e h c a p ciia N R C (1998, 2012) la a n h r d o d giai d o a n
KHKT Chdn nuoi so 256 - thdng 4 ndm 2020
DINH D U O N G V A T H I J C A N C H A N N U O I
dau va an han che d giai doan hi DDLD den PGLD. Lupng LysTH an vao cd su khac nhau giiia cac khau phan (P<0,05), ke't qua nay la do ham luong LysTH khae nhau giiia eac khau phan thi nghiem. Tinh trung binh ea TN bi 50kg den PGLD, lupng LysTH thu nhan hang ngay dao ddng 9,88-11,16 g/con/ngay, tha'p hon so khuyen cao ciia NRC (1998, 2012) va eiia Tran Thi Bich Ngpc (2014, 2019).
He so'chuyen hda thiic an d cae nhdm Ign eai hau bi dupc an khau phan vdi eae miic LysTH/
ME khae nhau khong cd su khac nhau d giai doan 50-80kg, 80kg deh DDLD va tinh ehung cho ca giai doan thi nghiem (P>0,05). Khac vdi nghien aiu eiia Calderdn Diaz va etv (2017); Tran Thi Bich Nggc (2019), ket qua cho thay khau phan an cd miic LysTH/ME cao da eai thien he so' chuyen hda thii'c an tii 6,1 deh 28,2% so vdi khau phan LysTH/ME tha'p. Tuy nhien, he so chuyen hda thiic an d nghien cuu ciia chiing tdi tha'p hon so vdi 2 nghien a i u ndi tren.
4. KET LUAN
Tang ty le LysTH/ME trong khau phan an ciia Ipn cai hau bi da khong anh hudng deh to'c do sinh trudng, tieu ton thiic an cua lgn cai hau bi d giai doan 50-80kg, 81kg-PGLD va ca giai doan thi nghiem, nhung keo dai TDDLD va TPGLD.
TAI LIEU THAM KHAO
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