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[j^ *1 iettcocephala. Animal Feed Science and 11. Rosecranee R.C., Rogers S. and Tofinga M.
J ^ o l ' Technology, 77:49-59. (1992), Effects of alley cropped Calliandra
^ h 8. Minitab (2010), Minitab Reference Manual, PC calothyrsus and Glinciilia sepium hedges on weed
; " « l i Version, Release 16.2. Minitab Inc., State S ™ " " ' ' =°'' prape«ies, and Taro yields in OldatlL College, PA Western Samoa. Agroforestry Systems, 19:57-66.
5lt»6 9. Mnir J.P. (2002), Hand-Plucked Forage Yield & 12. Van Soest P.J., J.B. Robertson and B.A. Lewis Bwli- Quality & Seed Production from Annual & (1991), Carbohydrate methodology, metabolism t f t k . Short-Lived Perennial Warm-Season Legumes ™'> nutritional implications m dairy cattle:
irjZ Fertilized With Composted Manure Crop Selence methods for diatary fibre, and nonstarch
! ,"«'•• Society of America. Crop Science, 42:879-904. polysaccharides in reladon to ammal nutrition. J.
,„ .-" 10, Nguyen Thj H o n g Nhan, Nguyen Van Hon Dairy s d , 74: 3585-3597.
va Mai Vu Duy (2012), So sanh nang suat, gia ^^- ^„**^" D u c V u (1999), Nghien cuu su dung mgt trj dinh d u o n g , kha n5ng thich nghi ciia ^° P^^^ P^^ P ^ ^ ' " va xay dung khau phan an Leucaena leucocephala, Calliandra calothyrsus va ^^° ^Z ^"^^ "^"^ *'^^" " S " ° " *^^*^ ^ " ^^" ™ ^ Flemingia macrophylla. T^p chi KHKT ChSn "^^^ ^° ^'"'^ P^^'^ Nam. Luan an Tien si Nong nuoi, 159: 33-39. nghiep. Vi?n Khoa hgc Ky thuat Nong nghidp
mien Nam.
KHA NANG THICH NGHI ^
CUA CO Setaria sphacelatq V 6 l CAC LOAI DAT KHAC NHAU TAI DONG BANG SONG ClJu LONG J ^ a j ^ r r
Nguyen Thi My Lmh ' vd Nguyen Thi Hong Nhdn ' ' Ngay nhan bai bao: 01/12/2015 - Ngay nhan bai phan bien: 10/12/2015
Ngay bai bao duoc chap nhan dang; 18/12/2015 TOM T A T
D e tai d u g c t h i ^ h i ? n t u t h a n g 06 d e n t h a n g 09 n a m 2015 tai T r u d n g Dai H o c Can T h a . Thi n g h i e m d u o c b d t r i t h e o t h e t h u c h o a n toan n g a u n h i e n voi 4 n g h i e m thiic t u o n g d n g vdi bdn loat dat: d a t thjt (DT), d a t cat (DC), d a i p h e n (DP), dat m g n (DM), 3 lan lap lai, mot Hn lap lai la 10 bau dat va moi b a u d a t t r o n g 3 h o m co Setaria sphacclata. Ket qua thi n g h i e m cho thay co Setaria sphacelata p h a t trien va cho n a n g s u a t cao khi trong 6 dat thjt va d a t cat, D a t p h e n co the trong co Setaria sphacelata n h u n g co p h a t trien k e m va cho n a n g suat t h a p khi trong d d a t m a n .
T^ khda: Setaria sphacelata, dat thjt, dd't man, dat cdt, ddl phen
A B S T R A C T
E v a l u a t e t h e a d a p t a b i l i t y of t h e g r a s s Setaria sphacelata w i t h d i f f e r e n t s o i l t y p e s i n t h e M e k o n g D e l t a
Nguyen Thi My Linh and Nguyen Thi Hong Nhan A s t u d y w a s c o n d u c t e d from June to September 2015 at the Can T h o University. The e x p e r i m e n t w a s a r r a n g e d in a r a n d o m i z e d c o m p l e t e w i t h four t r e a t m e n t s o n four types of different soils: g o o d soil, saline soil, s a n d y soil, acid soil, 3 replications, each replications w i t h 10 potting soil
' Khoa Nong nghi?p & Sinh hpc tj'ng dung, Truong Dai hoc Can Tho
• Tdc gi^ d^ Uen h^: TS. Nguyen Thj Hong Nhan, Khoa Nong nghi?p & Sinh hpc Cfng dung - Trucmg Dai hpc O n Tho. Difn thoai: 0947434989E-mail: nthnhan@ctu .edu.vn
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5i
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and each potting was planted 3 cuttings of Setaria sphacelata. Experimental results showed that Setaria spfmcelata grass growth and high yield when planted in good soil and sandy soil. Acid soil can grow grass but poor yields when grown in saline soil.
Keywords: Setaria sphacelata, good soils, saline soils, sandy soil, acid soil.
LD^TVANDfe
Hien nay, trong nhimg giong co thuoc ho Hda thao thi Setaria sphacelata la mot gidng CO mdi cd nguon goc tu; Australia va dang dirge trong 6 mpt so tinh vung Dong Biing Sdng Cihi Long (DBSCL). Cd Setaria sphacelata cd nang suat cao: khoang 22,12 tah/ha 6 Ida cat thu- 2 va dat 29,68 tam/ha 6 Id-a c^t t h d 3. Tinh theo vat chat khd (VCK), ham lugng dgm cao, dgt 12,25%/VCK. H o n niia, kha n5ng tai sinh nhanh, chiu dimg dirge kho han va ngap iing tot, ftian mem, thich hgp cho nhieu loai gia sue an eo (Bui Quang Tuan va ctv, 2009).
Th^ nhimg, di^n tich dat trdng co Setaria sphacelata tgi DBSCL van chua nhieu, trong khi do nguoi dan chan nuoi d mgt so vung khd khan van quen trong mgt so gidng cd cd n3ng suat va chat lugng ttiap. Hon the niJa, DBSCL con dien tich dat bd hoang kha nhieu, dac bi^t la dien tich dat phen va dat mgn, do khd khan trong vi$c cai tao cimg n h u canh tac khong mang lgi hieu qua. Chinh vi vgy, viec nghien cdu de tim ra Ioai cd cd khia nang thich nghi vdi eac dieu kien dat trong khae nhau, eho nang suat cimg n h u ph&n chat tdt, dat du dieu kien de Iam thiic an gia sue chinh la van de rat dang dugc quan tam hi?n nay. Trude tii\rc te do, de tai: "Ddnh gid khd ndng thich nghi cua co Setaria sphacelata vdi cdc loai ddi khde nhau tai D'ong Bang Song Cuu Long" da dugc tien hanh.
2. V^T LIEU VA PHU'ONG PHAP 2.1. Bd tri thi nghidm
Thi nghiem dugc tieh hanh tai Trung tam Thvre nghiem Nong nghiep, Truong Dgi hgc Can Tho, tir thang 06 den thang 09/2015.
Thi nehiem c6 Setaria sphacelata duoc b d tri theo the thiie hoan toan neau nhien vdi 4 NT: dat thit (DT), dat cat (DC), dat phen (DP), dat m a n (DM), voi 3 Ian Iao Iai, mdi Ian lap lai cd 10 bau dat vdi 3 hom cd/bau dat.
Mau dat ditac lav 6 do sau each mat dat 0,3 m: Dat thit d u o c lav tai v u d n qua khoa None nehieo va Sinh hoe LTne dune;
dat phen va dat eat d u o c lav tai Khu Hoa An thuoc Dai hoc Can Tho (xa Hoa An, huven Phune Hiep, tinh Hau Giane); Dat man duoc lav t£r cac bd ven ao nudi tom thuoc ap Ta Kv, xa Ninh Hoa, huy^n Hong Dan, tinh Bge Lieu.
Dat trudc khi trong d u g c logi sgeh da soi, re cay, nhanh cay va dugc phoi khd, bam nhuyen, trgn deu xong eho vao mdi bau nilon khoane 1.5 ke dat va 3 hom c6 eidne. Co Setaria sphacelata dugc lav tai tinh Sde Trane. Cd Setaria svhacelata duoc chon la nhiine bui cd t r u d n e thanh, bui cd nd to deu va rihieu tep, cd chieu cao 30-50 cm.
Sau dd cat h o m thanh dogn dai 10 cm tinh tii phan goc Ien.
2.2. Cac chi tieu theo doi va phirong p h i p thu thgp so li^u
So lieu ye eac chi ti§u sinh trudne duoc thu thap bat dau time, eiai doan 15, 45 va 60 neav tinh ti> neav trone, sau thu hoach ti&i hanh ehi nhan cac chi tieu ve nane
• suat cua eo: n a n e suat chat xanh, nane suat chat kho, n a n e suat protein thd (CP). Cac chi tieu cu the va each thu thap so lieu:
So choi tren bau (choi/bauV D a n tat ca sd chdi tren bau va dem tat ca so choi cua NT, dem vao giai doan 5,15,30,45 va 60 ngay.
Chieu cao cav (cm): Do tir m i t dat d a i diem eao nhat khi vuot thang la. Do chieu cao cua tat ea eo trong NT, do vao cac giai 15, 45 va 60 ngay.
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Chieu dai re (cm): Sau khi do chieu cao toan cav, cat ngane vi tri eoc co. Do chieu dai t u vj tri cat d e n phan dai nhat khi vuot thang re, do chieu dai cua tat ca cac bau trong thi nghiem, do khi thu hogch cd.
Thanh phan hda hoc: Cd dugc lav niau va dugc phan tich cac thanh phan hda hgc:
vgt chat kho, xo tho va protein tho theo phucmg p h a p cua AOAC (2001),
Nang suat chat xanh (g/bau): Cat va can toan bg cd tiing bau trong NT de tinh nang suat chat xanh.
Nang suat chat khd (ft/bau): Nang suat chat kho = Nang suat xanh x % vat chat kho (trang thai kho hoan toan)
Nang suat protein tho (g/bau): Nang suat protein tho = Nang suat xanh x % CP (trgng thai kho hoan toan).
Cd sau khi trong dugc quan sat, tudi nudc 2 lan/ngay vao buoi sang va chieu.
2.3. Xit li sd Ii#u
So heu d u g c xii Iy so bg bang phan m e m Excel va phan tich so lieu bang mo hinh Tuyen tinh tdng quat (GLM) cua chuong trinh Minitab Release 16.2 (2010).
3. KET QUA VA THAO LUAN
3.1. Dac tinh sinh trudng ciia cd Setaria sphacelata
3.1.1. Soclidi tren h'du
Su sai khac giiia cac gia tri t n m g binh ciia so chdi/bau giiia cac nghiem thiic cd v nghia thdng ke (P<0,05). Cac nghiem thiic cd so chdi phat trien on dinh qua cac giai doan thi nghiem, tuy nhien NTDM cd so chdi phat trieh khong dn djnh.
B ^ g 1. Sd ch^i tren bau cua cac nghidm thiic qua giai d o ^ khac nhau (choi/bau) Giai doan
5 15 30 45 60 TB
(ngay) NTDT 1,83' 2,47' 7,20' 7,17' 7,37"
5,21' NTDC
2,37"
4,57"
6,17' 6,77"
6,80"
5,33"
NTDP 1,900' 2,83"
1,97' 3,73' 3,80' 3,05'
NTDM 2,07"' 3,17*
1,20"
1,67' 1,63"
1,95' SEM 0,10 0,13 0,17 0,21 0,27 0,13
P 0,022 0,001 0,001 0,001 0,001 0,001 Ghi dm: Cdc sSmang chu cdi khac nhau trong ciing hdng thi su sai khac cd y nghia thdng ice (P<0,05)
va cudi cung la dat man cd anh hudng xau den chieu cao cay.
3.3.2. Chteu cao cdy
Dat thit cd anh hudng tot nhat den chieu cao cay, ke den la dat cat, dat phen
Bing 2. Chieu cao cay cua timg nghidm thuc qua cac giai d o ^ khac nhau (cm) Giai doan (ngay)
15 45 60 Trung binh
NTDT 54,63"
100,88"
115,77"
90,43"
NTDC 52,38"
96,23"
106,71"
85,11"
NTDP 43,53' 76,64' 91,88' 70,68'
NTDM 35,27"
17,71' 27,67' 30,22'
SEM 1,36 2,203 2,352 1,317
P 0,001 0,001 0,001 0,001
(5 giai doan 15 ngay, NTDT co chieu cao khac biet vol NTDC dat 52,38 cm va cao hon cay Ion nhat d^t 54,63 cm nhung khong co y nghia thong ke so voi NTDP (43,53 cm)
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va NTDM (35,27 cm) (P<0,05), ket qua nay eao hon so vdi nghien ciiu cua Nguyen Huv Chi^n (2009) tgi Tien Du (Bac Ninh) tren eo Setaria sphecalata cung giai dogn 15 ngay dgt 48 cm, do cd Setaria sphecalata thieh nghi tot vdi khi hgu ndng am. Vao giai doan 45 ngay, nhm chung chieu cao cay eiia eo 6 cac nghiem thiic deu tang, rieng NTDT ed su tang nhanh ve chieu cao so vdi giai dogn 15 ngay, dat 100,88 cm;
NTDC dat 96,23 cm eao hon d giai doan 15 ngay, tuy nhien NTDM cd sy sut giam chieu cao chi dgt 27,72 cm. Ket qua nay tuong dirong vdi ket qua nghien ciiu a i a Nguyen Huy Chien (2009) giai doan 45 ngay cao cay dgt 99,8 em va thap hon so vdi ket qua nghien cdu cua Bui Van Nhi (2012) dgt 115,03 cm va Huynh Van Khanh (2008) dat 122,48 cm. Thi n g h i | m cda chiing toi eo ket qua tuong duong vdi Nguyen Huy Chien (2009) la do vung dat Tien Du (Bic Ninh) la vimg dat mau mo, lgi dugc phu sa boi dap hang nam nen rat tot eho s\f phat trieh ciia cay. Sv tac dgng cua dat Ien chieu cao ciia cd Setaria sphecalata 6 giai dogn 60 ngay rat rd rang va tao nen su khac biet rat cd y nghla thdng ke (P<0,05). NTDT dat 115,77 cm cao nhat, NTDC dgt 106,71 em, NTDP tang Ien dang ke dat 91,88 cm, rieng NTDM cd chieu cao cay chi dat 27,67 cm la do trong giai dogn 15-45 ngay cd trong tren cac bau dat man bi chet nhieu, den giai doan 45-60 ngay chi eon song 11/30 bau da anh hudng den chi tieu chieu cao cay cua toan nghidm thde nay.
3.1.3. Chteu ddi re
Chieu dai re la ehi tieu ve sinh truong cda cay, chl tieu nay cho biet chieu dai phat trien ciia bg re trong dat, thong qua do cho bi^t c6 cd phat trien dugc va thich d n g vdi vdi Ioai dat hay khdng va phan anh tac dgng cua dat Ien kha nang sinh trudng cua cd.
2 6 ^
3 1 2 1 ' P=0,006
'aB—
NTDT NTDC NTDP NTDM Hinh 1. Chiigu dai cda re c6 Setaria sphacelata Trong qua trinh thi nghiem, quan sat thay ed 6 NTDP ed hien t u g n g mge re ra ngoai bau dat, ve cuoi thi n g h i | m thi hi?n tugng nay xay ra 6 tat ca cac bau thuge nghiem thiic nay. Ly do xay ra hien tugng nay la dat phen trong thi nghi?m cd tinh chua cao, chinh yi vay re cd khong die an thang vao chinh giiia bau dat, cpng vdi vdi su n i a p h e n d phan ngoai trong qua trmh tudi n u d c da khien cho re phat trien tdt hon 6 p h a n ngoai. Con ed trong 6 dat cat do dat cd dp rdi rgc nen rSft de dang cho re phat trien an sau vao bau dat nen chieu dai re bi h a n che trong bau dat, dd chinh la nguyen n h a n Iam cho chieu dai re eua NTDC ngan hon so vdi trung binh chieu dai re eiia NTDP. Trung binh chieu dai re cua NTDM ngan, cd chet nhieu, sa cau dat qua nang va chiia nhieu mudi nhu NaCI, Na2S04, MgCh... Ia cd hgi cho cay trdng, lam anh h u o n g den su phat trien eiia bg re.
3.2. Tinh nang sdn xuat cua co Setaria sphacelata
Chi tieu nang suSft (NS) phan anh kha nang san xuat d a p d n g nhu cau ve khoi Iugng ma gidng co co tiie cung cap tren cung mgt di?n tich so vdi cac gldhg cd khac. Chi tieu nay dugc thu thap vao cudi thi nghiem (60 ngay), cd duge can phan an dugc sau khi da bd re. Chi tieu nang suat dugc ghi nhgn gdm: nang suat xanh, nang xuat chat kho va nang suat protein tho.
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Bing 3. Nang suat ciia c6 Setaria sphacelata (g/bau) NTDT NTDC NTDP NTDM SEM Nang suat chat xanh 67,67" 70,50' 33,77* 6,77- 0,75 NSng suat chlft kho 7,43'' 8,56= 4,39"^ 1,18'' 0,251 Nang suat CP 0,73' 0,74' 0,49" 0,098'^ 0,023 P 0,001 0,001 0,001
JOBii
3.2.1. Nang suat chai xanh
Nang suat chat xanh la mpt chi tieu quan trpng trong viec danh gia chat luong ddng CO, nd ehiu anh huong cua cac yeu to nhu chieu cao cd, so choi, thdi gian thu hoach va cac thanh phan duong chat cd trong dat.
Ket qua thi nghiem cho thay nang suat chat xanh cua NTDC la 70,5 g/bau, khdng khac biet so vdi NTDT (67,67 g/bau), cao hon cd V nghia thong ke so vdi NTDP, chi dat 33,77 g/bau; NTDM cd nang suat xanh thap nhat, chi dgt 6,77 g/bau (P<0,05). Do cd dugc trdng d bau dat va dien tich cua tdng nghiem thiic la 0,3 m^ cho nen nang suat chat xanh cda cac nghiem thiic tinh tien di&n tich 1 hecta (ha) thu duoc n h u sau: NTDC dat 21,15 tan/ha, NTDT dat 20,3 tah/ha, NTDP co nang suat thap hon nhung eung dgt 10,13 tan/ha va NTDM chi dgt 2,03 tah/ha.
Ket qua thi nghiem thu dugc cao hon hon nghiln curu cda Le Toan Trung (2008) tien ed Ruzi, tgi Thanh pho Can Tho cd nang suat chat xanh la 20,25 tMi/ha, nhung thap hon so voi ket qua nghien ciiu Nguyen Xuan Ba va ctv (2009) tren cd Setaria sphacelata tgi Quang Tri cho nang suat xanh la 21,6 taii/ha va thap hon so vdi ket qua nghien curu ciia Bui Quang Tuan va ctv (2009) va Nguyen Huy Chien (2009) tien cimg gidng co va dat nang suat xanh 32,98 tab/ha va 45,15 tan/ha. Hay theo ket qua nghien a i u cua Vo Hoai Phu (2009) tren cd Paspalum atratum tai Thanh phd Can Tho cd nang suat chat xanh dat 22,07 tah/ha do cac thi nghiem nay cd su dung phan bdn lot hang nam va bdn thuc sau moi dgt cat nen dan den nang suat chat xanh tiiu dugc cao.
Chi tieu nang suat chiu su tac dong true tiep hoac gian Hep t u cac chi tieu sinh trudng. Tae dong true tiep den chi tieu nang suat la: Chi tieu so choi tren bau, so la tren bau, chieu cao cav, chieu cao choi va cac ehi tieu tac dong gian tiep Ien nang suat la chieu dai re va khoi luong re. Su tac dong cua dat trong la nhan to tac ddng quan tiong nhat den nang suat ciia Setaria sphacelata trong thi nghiem cua chung toi.
Giiia cac chi tieu nang suat cung cd su tac dong vdi nhau the hien 6 timg nghiem thuc khac nhau, nang suat chat xanh cao se dan den nang suat chat kho va nang suat protein cao va nguoc Iai, dieu nay dupc the hien ro hon qua chi tieu nang suat kho va nang suat CP ciia tdng nghiem thuc.
3.2.2. Ndng suoi chd't kho
Oua ket qua thi nghiem cho thay nghiem thiic cd nang suat chat kho cao nhat la NTDC vdi 8,56 g/bau cd y nghia thdng ke so vdi NTDT dat 7,43 g/bau, NTDP dat tiiap hon vdi 4,39 g/bau va thap nhat la NTDM chi dat 1,18 g/bau (P<0,05).
Tuong tu n h u each tinh nang suat chat xanh, nang suat kho ciia cac nghiem thiic n h u sau; NTDC 2,57 tan/ha, NTDT 2,23 tan/ha, NTDP 1,32 tah/ha va NTDM dgt 0,36 tan/ha.
Ket qua nans suat chat kho cao nhat la 2,57 tah/ha. So vdi ket qua nghien cuu ciia Bui Quang Tuah va ctv (2009), Nguyen Xuan Ba va ctv (2009) dat nang suat kho lan luot la 5,56 tan/ha va 3,61 tai\/ha;
Nguyen Huy Chien (2009) dat nang suat chat kho 7,25 taii/ha, cao hon ket qua eiia thi nghiem la do nang suat kho ehiu tac dong tiuc tiep tir nang suat xanh va thanh phan vat chat kho ciia co.
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3.2.3. Ndng suoi protein tho
Qua ket qua thi nghiem cho thay nang suat protein thd (CP) cua NTDC la 0,74 g/bau, khong khac bi#t so vdi NTDT (0,73 g/bau), cao hon ed y nghia thong ke so vdi NTDP ehi dgt 0,49 g/bau; NTDM cd nang CP thap nhat, chi dat 0,098 g/bau (P<0,05).
Nang suat protein tho cua cac nghiem tiiuc: NTDC 0,22 tah/ha, NTDT 0,21 tah/ha, NTDP 0,15 tah/ha, NTDM 0,029 t&i/ha.
Nang suat protein tho ciia thi nghiem tiiap hon nghien ciiu cua Bui Quang Tuan va ctv (2009) dat 0,65 tan/ha va N g u y i n Huy Chien (2009) 0,90 tan/ha, hay theo ket qua nghien cihi cda Khuat Thj N h u Diem (2013) tren cay Keo o i l (Caliandra calothyrus) va Nguyen Thi Khn Tuyen (2012) tien cay Dau rong hoang ed nang suat protein tho Kn lugt la 0,72 t^i/ha va
0,41 tan/ha. Nang suat protein tho cua thi nghi?m thap hon la do nang suat chat xanh, chat kho deu thap hon. Dieu nay diing vdi nhgn djnh ban dau cda chung tdi rang cac chi tieu nang suat cd su tac dgng qua lgi Ian nhau va nghiem thiic ed nang suat chat xanh cao se dan den nang suat chat kho ciia nghiem thiic do cao hon cac nghiem thiic khac va nguge Iai.
3.3. Thanh p h a n hda hgc ciia cd Setaria sphacelata
Trong cung dieu kien eham sdc nhu nhau thi thanh p h a n hda hgc cua cd Setaria sphacelata tiong tien bon logi dat khac nhau ciing khac nhau va s u sai khac giira cac gia trj trung binh cd y nghia tiiong ke (P<0,05), eho thay s y tac dgng cua timg Ioai dat Ien thanh phan hda hpc cua cd Setaria sphacelata.
Bing 4. Thanh phan hoa hgc cua cd Setaria sphacelata Chl tiiu (%)
VCK CFA'CK CPWCK
NTDC 12,14"
31,50'»
S,57'
NTDM 16,52- 25,88' 8,77^
NTDP 13,00' 28,56"
11,22' NTDT
10,99"
32,40- 9,76*
SEM 0,42 0,6862 0,4272
P 0,001 0,001 0,008
Ham Iugng vgt chat kho (VCK) a i a NTDM chiem 16,52% cao hon cd y nghia so vdi eac nghiem thde cdn iai (P<0,05) mge dil nghiem thiic nay cd nang suat chat xanh thap do ham lugng nude tiong cd ciia NTDM thap vi eo song tiong moi truong cd ndng dp mudi cao. Nguge Iai, cd Setaria sphacelata a NTDT ed ham Iugng VCK thap nhat, chi dgt 10,99% do dat thjt cd ty Ie cac hgt set cao, cd tinh ket dinh cao, dan den cd kha nang giu nudc tot, re co de hap thu va van chuyen nudc tot ttr re Ien than va la ehinh vi vgy cac te bao ciia co d NTDT luon cd mpt Iugng nude cao hon cac nghiem thiic, dieu nay da Iam cho ham Iugng VCK oia cd d NTDT giam xudng dang ke. Cd Setaria sphacelata 6 NTDC cd h a m lugng VCK la 12,14% va khong khac biet so vdi
NTDP (13,00%). Ket qua tiiu duge ve ham Iupng VCK thap h o n so vdi eae nghien ciiu tien eiing giong co Setaria sphacelata eiia Nguyen Xuan Ba va ctv (2009); Nguyen Huy Chien (2009) va Biii Quang Tuan va ctv (2009) Ian lupt la 17,2%; 16,24% va 16,85%. Ket qua ve tiianh phan VCK oia co nay thap hon so vdi co Long tay tai Hoa An (Hgu Giang) theo nghien ciiu ciia Quang Trpng N g u y i n (2012) la 17,36%.
Hai thanh p h a n hda hpc rat quan trgng doi vdi cay thiie an xanh dd la xo tiid (CF) va protein tiio (CP). H a m Iugng CF cua cd thupe NTDT dat 32,40% khong khac bi?t so vdi NTDC (31,50%) n h u n g eao hon cd y nghla so vdi hai nghiem thiic con Iai. Ket qua nay phii h g p vdi nghien cuu cua N g u y i n H u y Chien (2009) la
CHAN NUOI D O N G VAT VA CAC VAN DE KHAC
29,65% va Biii Q u a n g Tuan va ctv (2009) la 28,80%. Tuy nhien, so vdi m g t so gidng co khac n h a u thi h a m Iugng CF cua co Setaria sphacelata t h a p hon, theo ket qua nghien a i u cua H u y n h Van Khanh (2008) tien cd Sa tiong tai Can Tho cd h a m Iugng CF la 38,84% h a y nghien a i u ve co Ldng tay cua Quang Trpng N g u y e n (2012) cd h a m lupng CF la 35,76%.
H a m Iugng protein tho a i a co tiong tiii nghiem giiia cac Ioai d a t khac biet rat cd v nghia thd'ng ke (P<0,05). H a m lupng CP cua cd thuge NTDP dgt 11,22% cao hon cd y nghia so vdi NTDM va NTDC, d o tiong dat phen cd ty Ie m i m hiiu co cao, miie dp p h a n giai t h a p , d a m tong so kha cao (15-25%) d a n d e n h a m Iugng Nito tiong dat cao (Le Thai Bgt va Tdn That Chieu, 2000), tit dd Iam tang CP tiong cd tiong tien NTDP. Ket q u a nay t u o n g d u o n g vdi nghien a i u ciia N g u y e n Xuan Ba va ctv (2009) ed h a m l u g n g CP dat 11,5%; n h u n g thap h o n so vdi cac nghien a i u ciia Bui Q u a n g T u a n va ctv (2009) va Nguyen H u y Chien (2009) lan l u p t la 12,65% va 12,25%.
4. KET LUAN
Co Setaria sphacelata tiong tien dat thit va dat cat cho kha nang sinh truong tot va nang suat cao nhat, kha n a n g chiu phen kha tdt, n h u n g chiu m a n kem.
Co Setaria sphacelata cd kha nang thich nghi vdi nhieu loai dat khac nhau, co thanh phan hda hpe phu hgp de cd the trong phd bien va sii d u n g Iam thiic an gia sue 6 vimg Ddng bang song Cira Long.
TAI LIEU THAM KHAO
1. AOAC (2001), Offirial methods of analysis.
Association of official Analytical ctiemists, Washington D.C, Page 255-275.
2. Nguyen Xuan Ba, Nguyen Tien Von, Nguyen Huu Van va Ta Nhan Ai (2009), Kha nang san xuat chat xanh cua mgt so giong co 6 cac viing
CLia tinh Quang Trj, Tap chi Khoa hpc Cong ngh^
Ch3n nuoi, 22:52-59.
3 Le Thai Bat va Ton That Chieu (2000), Dat Viet Nam, NXB Nong nghiep. Ha Npi. Trang: 246 - 250.
4. Nguyen Huy Chien (2009), Khao sat mpt so nguon thiic an tho va tuyen chgn mpt so cay thuc xanh cho trau bo trong vy Dong- Xuan 6 huy^n Tien Du, tinh Bac Ninh, Luin van toi nghifp Cao hoc nganh Chan nuoi. D^i hgc Nong nghiep Ha Noi.
5. Khuat Thj N h u Diem (2013), Khao sat miic dp inh huong cua phan bon len khii nang sinh trudng va tinh nang san xuat cua cay Keo ciii (Caliandra calothyrsus), Luan van tot nghidp Dai hoc nganh Chan nuoi, Dai hpc Can Tho.
6. Huynh Van Khanh (2008), Khao sat dac tinh sinh truong va tinh nang san xuat cua co Sci (Panicum maximun) voi miic dp phan bon khac nhau, Luan van tot nghidp Dai hpc nganh Chan nuoi, Dai hpc C ^ Tho.
7. Minitab (2010), Mirutab Reference Manual, PC Version, Release 162. Minitab Inc, State College, PA.
8. Quang Trpng Nguyen (2012), Khao sat dac tinh sinh trudng va tinh nang san xuat ciia co Long tay tren dat phen x l Hoa An huyfn Phung Hifp tinh Hau Giang, Luan van tot nghifp D?i hpc nganh Chan nuoi, Dai hpc Can Tho.
9 Bui Van Nhi (2012), Khao sat d|ic tinh sinh truong va tinh nang san xuat cua c6 Vol tren dat Phen xa Hoa An, Hau Giang, Luan van tot nghifp D?i hpc nganh Chan nuoi, Dai hpc Can Tho.
10. Vo Hoai Phli (2009), Khao sat dac tinh sinh truong va tinh nang san xuat ciia c6 Paspalum atratum voi cac miic dp phan bon khac r\hau tai thanh pho Can Tho, Luan van tot nghifp Dgi hpc, Dai hpc Can Tho.
11. Le Toan Trung (2008), Khao sal d | c tinh sinh trudng va tinh nang san xuat oia co Ruzi (Brachiaria ruziziensis) vol cac miic dp phan hihi CO va phan hoa hpc khac nhau tai Tiianh pho Can Tho, Luan van tot nghifp Dai hpc nganh Chan nuoi, Dai hpc Can Tho.
12. Bui Quang Tuiui, Nguyen Thj Duong Huyen, Nguyen Huy Chien va Bui Thj Bich (2009), Nang suat, chat luong mpt so giong co trong trong vu Dong - Xuan tai Ha Npi va Bac Ninh, Tap chi khoa hpc va Phat trien, 9(1): 84-89.
13. Nguyen Thj Kim Tuyen (2012), Khio sat dac tinh sinh truong va tinh nang s ^ xuat cua cay Dau rong hoang trfn dat phen tai xa Hoa An huyfn Phvng Hifp Hgu Giang, L u | n van tot nghifp Dai hpc nganh Chan nuoi, Dai hpc Can Tho.
KHKT Chdn nudi sd 207 - thdng 6 ndm 2016
