' VA CAC VAN DE KHAC
ANH Hl/ONG CUA THOI GIAN CHIU HAN LEN KHA NANG SINH TRUdNG, NANG SUAT VA SU* THAY DOI SINH LY CUA
CO PASPALUM ATRATUM DLfOC TRONG TRONG N H A LU^OI
Nguyen ViieP-*, Vd Cong VianlP vd Luu Thai Danh' N g a y n h a n bai bao: 20/08/2019 - N g a y n h g n bai p h a n bien: 20/09/2019
N g a y bai bao d u o c c h a p n h a n d a n g : 30/09/2019 T O M T A T
Nghien ciru kha nang chiu han ciia co Paspalum len su sinh trudng, nang suai va thay doi sinh ly sau khi hen hanh cac khoang thdi gian xir ly han nhan tao khac nhau nham rim ra d u p c khoang thdi gian gay han ma cd van con kha nang hoi phyc sau khi tudi tro lai- Thi nghiem d u p c bd'tri hoan loan ngau nhien gom 4 nghiem thiic (NT) va 8 lan lap lai tucmg iing vdi 8 chau, Cac NT la: NT doi chung (PO); NT co khong d u p c tudi nudc trong 5 ngay (P5), 10 ngay (PIO) va 15 ngay (P15), CO dupc trong bang hom sau 30 ngay se rie'n hanh xir Iy ban va thu hoach d 60 ngay sau khi yong. Nhimg chi rieu a i a thi nghipm la sdchdi, chieu cao cay, so la, rpng va dai la, trpng lupng va dai re, nSng sua't, ham lupng chlorophyll, proline va nitrate. Kel qua thi nghiem cho thay so choi, so la, rpng va dai la, trpng lupng va dai re khac biet khong cd y nghia thong ke giua cac nghi&m thlic (P>0,05), Ngupc lgi khi keo dai thdi gian chiu han co co khuynh h u d n g giam chieu cao cay, dgc bi^t giQa NTPO va NTP5 so vdi NTPIO va NTP15. T u o n g ty, nang suat xanh, nang sua't kho va nSng suat protein tho cua co cung giam dan khi keo dai thdi gian chiu ban, trong dd NTP15 a i a co cd n5ng sua't tha'p nhat. Ham lirpng chlorophyll A, B va A+B khong chiu su tac dpng cua hgn, tuy nhien khi co bi han keo dai hiun lupng proline va nitrate se tang dan. Co Paspalum co kha nang sinh tnrdng, phat trien va cho nang sua't kha tot khi gap dieu kien han trong 5 ngay nhimg giam nang sua't va chat lupng khi thdi gian xir ly ban 15 ngay.
Tir khoa: Han. paspalum, ndng suat, thay doi sinh ly.
ABSTRACT
The effects of drought time interval of Paspalum Atratum grass on growth characteristics, biomass and physiological changes u n d e r greenhouse condition
To evaluate drought tolerance of Paspalum grass on growth characterisrics, biomass physiological changes was conducted at Experimental farm. College of Rural Development, Cantho University, The experiment was arranged completely randomize design with four treatments and eight replicates in corresponding to eight buckets. The treatments from this study were control (PO), without watering for 5 days (P5), 10 days (PIO) and 15 days (P15), 30 days after planting grass began to process in drought condirion depending on different treatments and harvested at 60 days. Parameters were rillering number, leaf number, leaf length and wildth, root weight and length, biomass, chlorophyll, proline and nitrate contents. The results show that rillering number, leaf number, leaf length and wildth, root weight and length were not significanOy different among treatments (P>0.05). In contrast when drought rime inter\'als were longer, the grass decreased plant height parricularly between PO and P5 compared to PIO and P15. Similarly green, dry and crude protein biomass also decreased as increasing drought rime intervals and P15 treatment was lowest biomass in compare to other treatments. Chlorophyll A, B, A+B were not affected by drought condition whereas Paspalum grass was higher proline and nitrate contents as increasing drought time intervals. In conclusion Paspalum grass can be tolerant with drought condition within 5 days, but biomass and quahty decreased when grass is without watering for 15 days-
Keywords: Drought, paspalum, biomass, physiologi/ changes.
' Trmmg Dgi hpc Can Tho
• Tac gia lien hp: TS Nguyen Thiei, Khoa Phal tneii Nong (hon. Trudng Dai hpc Can Tho Dien thoai: 00932147900, Email:
C H A N N L D I t i ^ J N O >.•>. » j j _ - . —
I.BATVANB^
Hipn nay, nen kinh te da't nudc dang trong thdi ki hpi nhgp, cac nganh nghe deu duyc thiic day phat trien. Nganh chan nudi dang dupc nha nudc chu trpng vdi nhieu chinh sach ho h p phat trien, nhat la chan nudi gia sue nhai lai (GSNL) nhu trau, bb, ciru, de, ... ngay cang phat trien mgnh me. Dudi ap lyc dan so gia tang, nhu cau rieu thy eac san phain tii thjt va siia cung tang, De dap ring nhu cau rieu dung dd nudc ta phai nhgp thit bo, trau va cac san phamtii sua cua cac nudc Uc.Anh, Mv. AnDp, New Zealand (.\gu\en Van Thu, 2010).
Theo Quyet dmh so 10/2008/QD-TTg cua Thu tudng Chinh phu phe duypt "Chie'n lupc phal hien ch3n nudi deh nam 2020" cua Bp Ndng nghipp \a PTXT. deh nam 2020 dan bd sua dgt 500.000 con, dan bd thit 12,5 tripu con (KT lgi), dim trau 2,9 tripu con va dan de, ciru 3,9 tripu con. Vcri myc rieu phat tridn sd'luyng kVn gia .sue nay thi ngudn thuc an xanh du de cung cap cho chiing la mpt van de nan giai ddi vdi nhieu nha chan nudi. Them vao dd, nganh chan nudi GSNL ggp nhieu klio kh5n do tiic dpng cua thdi riet khae nghipt nhu: ret dam, ret hgi, mua, Iu dgc bipt la rinh trang hgn han, xam nhgp mgn nghiem trpng tren dja ban ea nude. Trong dd ban han la mpt van de cue ky nghiem hgng. Theo Dang Thi Thanh Hoa (2013), hgn han xua't hipn tren dipn rpng va Ihudng \a\- ra vao nhijng nam E! \ n i o gain dii\-. Vipc nang ndng va thie'u nudc tudi cd da'u hipu gia tang rd rdt d nhieu vimg khi hau, dac bipt la d Trung va Nam Bp. Vdi tinh hinh bieh ddi kill hgu, hgn ban ngav cang dien bie'n phiic tap da mgl phan anh huong deh nganh chan nudi GSNL, dac bipt la thie'u ngudn thiic an xanli. De ling phd vdi rinh hinh han han dd, can phai cd nhiing danh gia ve kha nang chiu hgn ddi vai nhirng gid'ng eo trdng phd bie'n o nuoe ta. Tir lau, eo Paspalum da dugc chgn lam ngudn thuc an xanh cho GSXL bdi rinh ngon mipng va nang suat tuong ddi cao. Da cd nhieu nghien cun ve kha nang ngap ung va nliiem phen cua cd Paspalum, tuy nhien cd bj ban che ne'u bi ngap ring lau dai (Ngu\'en Thj
Hdng Nhan, 2tX)3)- Mgt sd nghien cmi h^W'^
day nhgn dinh rAng co Paspalum cd the smh trucmg dupc hong dieu kipn hgn ban, d^c bit,'l la dieu kipn thie'u nude tuxVi trong n3m ngay lien ri^c klidng anh huimg den n5ng suat ciia CO (Nguyin \'an Phii, :0(l(^ Ngii\ en Chi Bao, 2017), Tuy nhien, chua cd nghien cuxi nao danh gia kha nang chju hgn cua co I'.ispalum dai hem 5 ngay. Chinh \i vay, nghien ciiu hipn tgi duge Uiyc hipn nhiim danh gia anh huxVng ciia cac thdi gian chju han kh.ic nhau Ien sinh trudng, nang siuit va thanh phan hda hpc cua CO Paspalum la cain thiol,
2. VAT LI|U VA PHOONG PHAP NGHI&N COU 2.1. Ddi tugng
Thi nghipm duge tieii hanh tren gid'ng cd hda thao Paspalum. Co dugc trong b3ng top va dupc lay rii trgi thyc nghipm ciia khoa Phat trien Ndng thdn, trudng Dgi hpc Can Tho.
2.2. Bd tri thi nghi&m
Cac chgu trong eo thi nghipm cd dudng kinh 30cm, cao 40cm, dipn lich mat 0,07m^.
Mdi chgu chua 10kg gia the vdi ti Ip 60% da't, 20% phan bd, 20'".. tro ha'u. Da't dupc la'y til' trgi thyc nghipm va su dyng vdi sd'ng rai len da't gilip dat hg phen, giam dp ehua Diing ludi miit cao ed Id Ixicm de loai bd di vgl va da't cyc qua ldn, sau dd trpn deu vdi phan bdn Idt va cho vao chgu. Trdng 2 hom ed gid'ng/chau, rii'di nudc 2 lan/ngay vdi 100m! nudc/chgu/lan vao thdi diem 8 gid va 16 gid. Cd sau khi lrong dupc 7-10 ngay quan sat theo ddi, lrong dam bang hom neu eay bj chet. Theo Hoang Van Tao (2015), muc phan bdn cho Iha la 20 tan phan chudng *• 200kg N + 60kg Pp^ + 180kg K p (hJ'ong duong lOOg phan chuong + lg N + 0,3gP.O- + 0,9gK,O/chau),
Thinghipm duge bo h-i Iheo the thiic hoan loan ngau nhien, gdm 4 NT v'a 10 lan lap lai la 10 chau: NT ddi ehung (PO): khdng xu ly han.
NTP5: cd khdng duoe hrdi nude hong 5 ngay.
NTPIO: cd khdng dupc tudi nudc hong 10 ngay NTP15: co khdng dupe hjdi nudc trong 15 ngay Bat dau ghi nhan cac chi lieu ndng hpe vao cac ngay thu 30 (tmdc khi xu ly han) va 60
KHKTChan nuoi s(> 254 - ihdng 2 nam 2020
V,..7 VA CAC VAN DE KHAC
sau khi h-ong (sau khi xir Iy han). Cd duprc thu hogch vao ngay thii 60 va sau dd se ghi nhgn cac chi Heu nang sua't va thanh phan hda hgc.
Plnrong phdp gay ban: Sau khi hong 30 ngay, rie'n hanh ngung tudi nudc de xii ly hgn nhan tgo. Cac NTP5, NTPIO, NTP15 hk dau
Phuong phdp ghi nhgn cdc chi tieu
xir ly han nhan tao o cimg thdi diem la 30 ngay sau khi trdng \'di then gian gay hgn (khdng tudi nudc) tuong iing la 5, 10 va 15 ngay lien tuc. Sau khi het thai gian xu ly hgn ciia timg NT, cd dugc tudi nudc trd lgi binh thudng deh ngay thu hoaeh (ngay 60 sau khi trong).
Sochoi/bgi So' ia/choi Cao ca)' (cm) Rgng la (cm) Dai li (cm) Dai re (cm) Khoi luQng re (g) NS xanh (g/ch$u) NSkh6(g/chau) NSCP(g/ch3u)
Dem la'l ca so'choi/bui 6 thoi diem 30 va 60 nga)- sau khi trong Dem ta't ca soja tren mpt choi 6 thoi diem 60 ngay sau khi trong Do tiJ m?t da't den cho t|ri cimg khi vTiot thang la 6 thin diem 30 va 60 ngay sau kht trong Dqqphan rpng nhai cua la thii ba ke tii ngpn xuong vao thoi diem 60 ngay sau khi trong
Dai la dupc do 6 la thii ba ke tir nggn tro xuo'ng vao thoi diem 60 ngay sau khi trong Dai re dupc do khi thu hoach bang each; rua s^ich re, tach dat ra khoi re, go re tbi ra va do
chieu dai re tir goc de'n chop re dai nha't
Khoi Iugng re dupc can khi thu hoach bang each rua s^ch re, tach da't ra khoi re, cat re ra khoi than va tie'n hanh can.
Can toan bg co thu hoach dupc tren timg ch^u o^moi ngtu^m thiic Dugrc tinh tir v|jt chal kho va nang sual chat xanh
Dugc tinh tu protein tho va nang suat chat kho Lciy mail vd phdn tich mdu: L a y n g a u n h i e n
180g cd tu'oi cat d mdi NT cho vao riii nilon cpt mipng kin de tranh ma'l nudc, danh da'u va mang ve phdng thi nghipm, Mau dugc chia lam hai phan, phan 1 lay 30g mau tucri de phan tich ham lupng nitrate theo phucmg phap AOAC (2001) va proline theo Bales va ctv (1973). Phain 2 lay so Iugng mau cdn lai dem say d 65''C de'n khi mau khd, gidn va dugc bao quan de phan rich chat dipp lye (chlorophyll) theo phuong phap cua Zapata va ctv (2006).
2.3. Xii ly sd lipu
So lipu dugc xir ly so bp tren Excel, sau dd theo phucmg phap phan lich phucmg sai long quat (ANOVA GML) bang chuang hinh Minilab version 16.2, ne'u nhu cd sy khae biet cd y nghia thd'ng ke thi tie'p tyc su dung phep thu Tukey de so sanh giiia eac NT.
XK^OUAVATHAOLUAN
3.1, Anh hudng ciia thdi gian xir Iy han den sd choi/bui
Sd'chdi/byi giiia eac NT khdng cd sy khac bipt cd y nghia thd'ng ke (P>0,05) d giai doan trudc khi gay hgn va sau khi gay han d 60 ngay sau khi hong. So choi tgi thdi diem 60
ngay giam dan khi thai gian xii' ly hgn tang dan tir 7,5 ehoi/byi cua NTP5 xud'ng cdn 5,63 chdi/byi cua NTP15. "Theo nghien cuu cua Bogeal-Triboulot va ctv (2007), cay thie'u nudc lau ngay se Iam suy giam sy phat trien va phan lap choi. Dieu nay the hipn ket qua lai thdi diem thu hogch cua NTPIO va NTP15 cd so choi giam di so vdi NTPO va NTP5, Dieu do chiing td rang han cd the lam cho sd' choi ciia co tang hogc giam tiiy lhudc vao thai gian cay bi hgn dai hay ngan. Ket qua thi nghiem cho tha'y sy phat trien chdi ciia cd Paspalum khdng bi anh hudng trong thdi gian han 5 ngay.
Ngugc lgi so chdi, chieu cao eay tai thdi diem thu hogch ed sy khae biet ed y nghia thd'ng ke (P<0,05). Chieu cao tai thai diem thu hogch cua NTP5 cao nha't (102,13cm), khdng khae biel so vdi NTPO (91,75 cm) va cao hon so vdi NTPIO va NTP15. Theo kel qua ghi nhan tgi diem thi nghiem, chieu cao giam do bi anh hudng cua nhiet dp cao hong nha ludi va thdi gian xir ly ban keo dai se dan de'n heo chdp la.
Tuy nhien, chieu cao cua NTP5 khdng nhiing khdng anh hudng ma chieu eao lang vupl trdi so vdi cac NT edn Igi. Chieu cao tai thdi diem thu hoach cua NTP5 ngay tha'p hon so vdi thi nghiem cua Nguyen Chi Bao (2017).
C H A \ M J Q i p g i N c r \ A i ^ > A v . ^ ^ • • -
Chi tieu
Bangl. So choi va chieu cao cua co Paspalum d 30 va 60 ngay sau khi tn- Ciai doan PO PS PTO PIS SFM _ So choi (chdi/byi)
Chieu cao (an)
H.
H, H.
H- 4.50 6,63 85,50 91,75*
4,00 7,50 77,50 10113-
3,50 7.25 ti7,13 SI..IS"
3,00 .5,63 80,50 85,50"
0 3^
lUfi 0,45 0,01 Gbi chii - Cac gid tri tnmg bmh lrong eu n;.; hdng mang cbir edi klidc nhau tbi sai klidc at y nglna tbong kc H^ truac hgn d 30 ngdy sau kin tnmg. H sau ban o 60 ngdy sau khi trong.
cpng vdi vipe cac te'bao cua la bj leo lgi ya^sy 3.3. Anh hudng ciia thdi gian xir lv han den
sd la, dai la, rpng la.
Ket qua Bang 2 cho tha'y sd' Ia/cay giam dan khi thdi gian gav han lang dan, tuy nhien sy khac bipt nav la khdng cd v nghia thdng ke (P>0,05). Sd'la d NTPO \ a \T[''5 tuong ty nhau va cao hem so voi NTPIO va NTP15. Dieu nay chiing td rang vdi miic xu lv hgn 5 nga\ thi cd Paspalum van cdn mpt lugng nudc can thiol de dy tru' cho sy sinh trudng cua cay trong Ihdi gian chiu hgn. Theo Benjamin Cummins
phan cilia bj giam di khien eho la gia di va heo nhanh chdng (Karamanos, I9S0).
Nhin Chung khi thdi gian xu ly hgn cang keo dai thi chieu dai va klidi Urgng re cd chieu hudng giam so vdi NTPO. Tii dd cd Uie suy lugn rang neu chieu dai v'a khdi luyngre giam nang sua't cung giam theo. Bdi vi re la bg phgn rat quan hpng ciia cay, cd chuc nang hul nuoc va cac chat dinh dudng eung cap eho cay sinli trudng va phat trien de tgo ra nang suat cao.
Ihl
(2007), sp thoat hen nudc la mpt qua trinh 3 4 ^ ^ j ^ hudng ciia thdi gian xu ly han den tuong ty bay hoi, la mpt phan ciia chu hinh j^|„g gy^j ^ ^ ^ ^.^ Paspalum
nudc trong ca the thyc vat va la sy mat hoi nudc til cac bp phan ciia cay, dac bipt xay ra trong la. Be mat la cd cac khi khdng va su thoat hoi nudc qua la xay ra qua cac Id khi.
Dieu dd giai thich rang cay giam sd' lucmg la de giam lugng nude thoat ra nham giiip cay duy Iri su sd'ng. Vi vay thdi gian gay han 10 va 15 ngay lam cho sd'la giam nham duy tri sy sdng cho eay.
Bing 2. Sd la/cay, dai va rpng la, dai re va tipng Iugng re cua co Paspalum 6 thdi diem
thu hoach
Chi tieu NTPD NTF5 NTPIO I^P15 SEM P ~
Nang sua't (NS) cd Paspalum giam dan klii thdi gian han tang dan, dac biet giiia NTPO va NTP5 so vdi NTP15 (P<0,05). Nhin chung, NS ciia cd Paspalum tgi NTP5 khdng khac bipt va cd xu hudng cao hon so vdi NTPO. Tir Bang 2, 3 va 4 cho tha'y md'i quan he giiia so choi va chieu cao da anh hudng de'n NS ciia cd, d NTP5 ed sd' chdi va chieu cao ldn hon so vdi cae NT edn lai nen NS eiing cao hon.
Bang 3. Nang suat ciia c6 Paspalum (g/chau)
SoUi Dai la, cm Rpng la,cm Dai re, cm K L re,g/chau
6,25 73,25
1,94 79,88 31,89
6,25 71,25 2,05 74,00 23,51
6.00 62,13
\.Sh 77,00 25,66
5,50 66,00 2,10 70,25 23.46
0,27 3,24 0,08 7,46 3.47
0,22 0,10 0,22 0,82 0,32
Chi tieu NTPO 162,31'' 41,60'
3,81' NTP5 215,10^
45,16' 4,14^
NTPIO 166,06'' 36,02"^
3,30'*- NTP15 127,04' 23,32'' 2,14''
SEM 8,73 3,05 0,28
P 0,01 0,01 0,01 3.6. A n h h u d n g ciia t h d i gjan xii ly h a n d e n h a m I u o n g d i e p l u c td, n i h a t e va p r o l i n e cua co T u o n g t y s o la, d a i la v a r d n g la k h d n g cd H a m l u g n g c h l o r o p h y l l A, B va A+B s y k h a e b i e t cd y n g h i a t h d h g ke g i u a cac N T k h d n g cd s y k h a c bipt cd y n g h i a t h o n g k e (P>0,05). T u y k h d n g b i a n h h u d n g b o i n h a n (P>0,05). H a m l u p n g c h l o r o p h y l l A ciia c a y to h g n , n h u n g d a i la lgi thdi d i e m t h u h o g c h t a n g d a n k h i k e o d a i t h d i g i a n \u [y ^ 3 ^ XTIMO v a N T P 1 5 d e u tha'p h o n s o v d i NTPO. C u t h e la tir 7,05 [i^rcd a NTPO t.ing d a n l e n S u g i a m kich t h u d c n a y la d o s y thie'u n u d c 9,61 p g / m l d NTP15- Ket q u a o NTPS cd h a m keo d a i d a l a m c a n t r o s y s i n h t r u d n g c u a la l u p n g c h l o r o p h y l l A xu h u d n g l a . . h o n so v d i
KHKT Chdn nuoi so 254 - than ' 2020
I [-^XJXJI n T y i ' ^ o v ^ '
• VA CAC VAN DE KHAC
till nghipm cua Nguyin Chi Bao (2017). Tuong ri^, thdi gian xir Iy hgn cang lau thi ham luyng chlorophyll B, A-i-B ciing tang dan rii NTP5 den NTP15. Ham lugng chlorophyll tang khi Bang 4. Ham lupng di?p luc td, nihate va
keo dai thdi gian ban cua cd la do ham lupng chlorophyll hong la cao da tang eudng tinh chiu hgn keo dai, giup cay nhanh phyc hoi sau hgn (Percival va Noviss, 2008).
proline cua co Paspalum trong thi nghi&m
Chi tieu NTPO NTP5 NTPIO NTP15 SEM
Chlorophyll A(|ig/ml) Chlorophyll B (jig/ml) Chlorophyll A+B (|ig/ml) N'ltrate (mg/kg) Proline (Mmoi/g)
7-60 7-05 8,87 9,61 0,82 0,17 2,12 2,22 2,63 2,75 0,25 0,27 9,72 9,28 11,50 12,36 1,07 0,19 380,5^ 307,25'' 413,52*' 576,32' 34,03 0,001 0,30^ 037^ 036^ 036^ 0,01 0,001 Ham lupng nitrate cd sy khac biel giiia
cac NT (P<0,05). 6 NTP15 ham lupng nitrate cao hon so vdi cac NT cdn lai va khi keo dai thdi gian hgn thi cd cd khuynh hudng tang dan ham lugng nihate tir 307,25 mg/kg d NTP5 Ien 576,32 d NTP15. Qua dd cho tha'y ne'u cang keo dai thdi gian gay han thi lam lupng nitrate se cang cao dieu do se khdng cd lpi cho gia sue nhai lai.
Tich luy proline la da'u hieu cua rinh trgng sinh ly bi xao trpn gay ra bdi cac hinh thai shess tir mdi Irudng. Khi cay bi hgn lhi te bao se tang cudng sinh tdng hgp proline de dieu chinh ap sua't tham tha'u giup cay lgp thich nghi vdi dieu kipn nay. Proline cd the dupc xem la mpt chat chi thi cho viec dap ling vdi cac dieu kien bat loi nhu han han, dp man cao va ca nhiel dg tha'p. Theo Chen va Muranta (2002), sue chd'ng chiu cua thyc vgt tang len khi dupc chuyen cac gen ma hda enzyme tham gia vao con dudng stnh long hpp proline hong te' bao. Nhieu cdng hinh nghien ciiu ciing cho tha'y sy hch luy proline cd the lang 10 de'n 100 lan d thye vat dudi tac dpng Clia ap sua't tham thau. Qua Bang 5 eho thay ham Iugng proline cua cd Paspalum cd sy khac bipt cd y nghia thd'ng ke giiia cac NT (P<0,05). Qua cac khoang thdi gian gay han khac nhau thi ham lugng prolin ciia ed khdng khac bipt cd y nghia riid'ng ke va cao hon so
\ ai NTPO. So sanh vdi thi nghiem ciia Nguyen Chi Bap (2017) thi ham lupng proline d NTP5 trong nghien ciiu nay ldn hon.
H. KET LUAN
Ke't qua thi nghiem cho tha'y cd Paspalum cd kha nang sinh trudng, phat trien va cho nang sua't kha lot khi gap dieu kipn han lrong 5 ngay nhung giam nang sua't va chat lupng khi thdi gian xii ly han tir 15 ngay trd len, Ldi CAM ON
Nghien ciai dirge hodn thdnh dudi su ho trg kinb phi tif Dir dn ndng cap Truang Dgi hgc Cdn Tha trong bgp ddng ngluen ciru khoa hgc vd phdt trien cong nghe so 0VHD.VNUP6-NCKH.2017 Clia chuang trinh Vut thgp, danb gid vd phdt trien cdc nguon tdi nguyen thuc vgt (Ida, cdc cdy trong kbac, cdy thirc dn gia site...)
TAI LI|U THAM KHAO
1. AOAC (2001). Official methods of analysis. Association of official Analyhcal chemists, Washington D C, Pp 255-75 .;- Bales L.S., VValden R.P- and Teare I.D. (1973), Rapid
Determination of Free Proline for Water - Stress Studies, Plant & Soil, 39(1) 205-07.
3- Nguyen Chi Bao (2017)- Khao sal dac tinh sinh truong va nang suai ciia co Paspalum va co Sa {Panicum maximum cv. Mombasa) trong dieu kien chiu han Luan van lot nghiep dai hgc, truong Dai hpc Can Tho
4 Benjamin Cummins (2007). Biolotucal Science, Freeman, Scott, P 215,
5, Bogeat-Triboulol Brosche M.B., Renaut M., Jouve J., Le Thiec L. and Fayyaz D. (2007) Gradual soil ivater depletion results in re\'ersible changes of gene expression, protein profiles, ecophysiology, and growth performance m Populuseuphratica, a poplar growing in and regions Plant PhysioL Plant Prod, Sa : Whole Plant and Ecophysiolog\', 143 876-92
6, Chen T.H, and Muranta N. (2002) Enhancement of tolerance of a family of plant dehydrin protein Physiol plant, 97. 795-03.
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•- D * n g Thi T h a n h H M (2)13). Tac d ^ g bien doi U u h^u 12- N g u y e n V i n P h u 12006). Khao s.it -uili h^""^^ •• ' ^^ .^ ^,;j d e n n g a n h trong lua tai h n h Lao Cai va d e w j i l giai | * a p c i c h va p h a n bon Icn d J c tinh sinh irui"'.': "•^"'^ '^ ^'^ ^.^^
u n g p h o L u i n van Ihac a khoa h p c T r u o n g Dai ligc gia tri d i n h d u o n g cua Paspalum atratum I " ' ' " *' Khoa hpc T y N h i e n . Doi hgc Q u o c gia Ha N ^ . n g h i p p Dai hpc, T r u i m g Dai hpc Can Tho ..^
•' K a r a m a n o s A.S. (1980). Water stress a n d leal gn>» th of 13 ^^^^ v ^ „ j ^ ^ (3013,. ^,.^,^.0 c u u kha n.>ng ->" " " ' ) ' field b e a n s (Mmfohfl) in the field: Leaf n u m b e r a n d total . ,,_^^ ^ ^ j , ^.^ , ^^„ ,^,n t h o nipi ^^' '-i^' ' " " ^ a r e a A n n , B o t 42.1393-02- , , - . . , - n \ „ v . h . \TI L i n n .m'"^'"""' '^
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d y n a m i c s of Fagus s v l v a l i c a d u n n g excephonal dnaught, , „ , „ , .-., . J „ K ,-hSn nuoi gia -sue F o r Ecol. M a n a c 2.17 1 3 W : , 4 . N g u y e n V i n T h u (2010). M o l m h ^ M " ^ ^ !•
10 N g n y c n l l i i H o n g N h a n ,:iKr,, C a o m n h Ihuc i n g.a nhai Iji, NXB I r a o n g B j " l ' « Can m - . i - a sue, \ X B m K m g D a i h o c C a n T T i a . C a n T h o 13. Zapala M., G a r r i d o J.L. a n d Jcttrey ' , .^ ^^^
„ P . r d v a l C C . a n d \ o . , s , K i » » , Tnazolc Chlorophyll P i g m e n B , Currenl .Slalus. In i ^ i , induced , l n , u c h , lolcrancc m hors,' d.c-slnul (eds) Chlorophylls and B.xlcriochlorophylls M ™ ^ ^ ^ ^ ^ ^ (,4«f»lr,slii;7i<>ca-(mium) Tree P h y s i o l . 2B( 11) lbSS-il Photosynthesis a n d Respiration. 2.1 5pnnger,
KHA NANG SINH TRLfONG VA NANG SUAT CUA CO PASPALUM ATRATUM VA CO SA TRONG DIEU KIEN HAN
Nguyen Thiel'-*, Vd Cong Thdnh' vd Luu Tlmi Danh'
\ g . n n h a n bai bao: 20/09/2019 - Ngay nhgn bai p h a n bipn: 09/10/2019
\ g a \ b.ii bao d u p c cha'p n h a n d a n g : 25/10/2019 T O M T A T
Nghien cuu njv nhSm so sanh kha nang sinh trudng va nang suat ciia ciia hai loai_c6 Paspalum atratum va co S.i trong dieu kien hgn nhan tao. Thi nghi&m d u p c bo y i hoan toan ngau nhien voi hai nhan to: Nhan to 1: cd Paspalum (Pa) va cd Sa (Sa); nhan to 2: dieu kien han (co d u p c tudi nude, HO hoiSc khdng dupc tudi nudc trong 5 n g a y H5), lap lgi 10 lan. Co d u p c trong bSng hom sau 30 ngay se rien hanh \ u ly hgn v,i thu hoach 6 60 ngay sau khi frong. Nhiing chi rieu cua thi nghi&m la so choi, chieu cao cay, so la, rpng va dai la, trpng lupng va dal re, nang sua't, thimh phan hda hpe eiia CO thi nghi&m. Kei qua thi nghipm cho thay so choi, so la, rpng va dai la, khdi lupng va dal re, thanh phan hoa hpc khong chju sir anh hudng tu'ong tac cua han va gid'ng co (P>0,05). Kha nang sinh trudng, nang suat va ham lupng xo (ADF va NDF) ciia co Sa cao h o n so vdi cd Paspalum, Them vao do, han khong anh hudng den chieu cao, sola, rpng la, dai la va thanh p h a n hda hpc ciia hai Ioai co. Tuy nhien, han da lam giam s u phat tricn so choi va re ciia cay, dan de'n nang sua't ciia hai logi cd tha'p hem (P<0,05). Ket qua a i a thi nghiem cho tha'y trong dieu kien d u n u d c tudi cd Sa CO klia nang sinh trudng va nang suat cao hem co Paspalum, tuy nhien khi cd bi thieu n u o c trong 5 ngay thi kha nang sinh trucmg, nang suat cua hai lo^i co n h u nhau.
Tir khoa: Hgn, stnh Irudng. ndng suat. tbdnh phdn hoa hoc.
ABSTRACT
Comparision of growth characterisrics and yield of Paspalum atratum and moinbasa grass (PrtJiicwiii maximtmi cv. Mombasa) under drought conditions
A study aims to compare the growth characterisrics and yield of Paspalum atratum and inontbasa grass (Pamcum maximum c\'. Mombasa) under drought conditions. The experiment was ramdomly designed with two factors consisting of two kinds of grasses (Moinbasa-Sa or Paspalum grass-Pa) and drought condihons (with, HO or without watering in five days, H5) and ten replicates, cach replicarion \\ as a pot- Parameters were plant height, tillering number, leaf number, leaf Icnj^th and
' T r u o n p Dai hoc Can Tho
• Tac gia lion K> TS \ R u \ e n lliiet, Kho.i Phat t n e n .N'ong thon, T r u o n g Dai hgc Can T h o . Dien thoai- IMcn^i i
