Dihoa hoe^ - ^JMU^ n^t^ - MM tni&nq^
ANM HUONG CUA MOT SO CAY HO DAU TRONG XEN NGO LAI DEN KHA NANG CHONG XOI MON DAT TAI HUYEN EA KAR, TINH DAK LAK
l.Datvlhdl
Thoai hda dat d ntfdc ta dang li mdi quan tam hing dau trong qui trinh phit trien ndng nghifp, trong khi difn tich dit thoii hoi d ntfdc ta ngay cang tang. Da't ddc li dien tieh chu ye'u cua ntfdc ta de phat trien ndng nghifp. Dien tich dat ddc d ntfdc ta ed 30.892ha, trong dd da't ddc cd dp ddc < 15° cd dien tich: 13.l50.000ha. da't cd dp ddc 15°- 25° cd dien tich 2.905.000ha. Dat cd dp ddc >
25° cd dien tich la 14.837.000ha. 6 Tay Nguyen vdi dien tich 56.199km\ hdn 90%
dien tich da't trdng trpt cua Tay Nguyen nam trenthf'ddc.
Nguyen nhan chinh gay ra hien ttfdng xdi mdn da't la do dpng nang cua hat miTa gay ra, khi chung va d i p trtfe tie'p vao mat da't ddc.
Nguyen nhan thtf hai gay ra hien ttfdng xdi mdn da't la ddng nang eua ddng chay tren mat da't. Khi tren mat da't ddc xua't hien ddng chay se b i o mdn va cudn theo Itfdng da't bj bao mdn xudng chan ddc.
Hifn ttfdng xdi mdn. rtfa trdi tren da't ddc gay hau qua ro de'n dp phi da't, Itfdng da't be mat vi ning suat cay trdng trong sin xua't ndng nghiep.
Nhieu tic gia quan tam de'n van de canh tic tren da't ddc, die biet li luan canh, xen canh trong he thd'ng cay trdng. Cay hp dau la cay phu da't. dtfdc trdng xen nham han che stf va dap cua cac hat mtfa to \ ao da't, han che ddng chiiy. chdng xdi mdn, bao \ e da't, giff dp am, han che stf phit trien cua cd dai, lim tdt da't. Trdng trpt chu veu la mdt de'n hai vu, thdi gian khdng cd cav U-dng che phii da't ttf
1/3-2/3 so ngay trong nim do vay bdc hdi ntfdc manh. dp Im da't giam lam eho tdc dp khoing hda da't dien ra nhanh hdn. Day la
TS. Trdn Van Thuy TrUctng Dgi hoc Tdy Nguyen nguyen nhan chinh d i n de'n hien ttfdng thoii hda da't ndng nghiep. Mat khic canh tic chu ye'u la mpt tang khdng tan dung dtfdc anh sing, dinh dtfdng vi tfu the eiia da dang hda sinh hpc cho nfn van de sau benh thtfdng xay ra vi dan de'n hifn ttfdng giam nang suit. Vi vay van d l trdng xen cay hp dau vdi bap da dtfdc dat ra trong qua trinh nghifn cull.
2. Dd'i ttfdng, phtfcfng phap nghifn ctfu Dd'i ttfdng nghiSn cthi: - Gidng ngd lai:
G49 eua Cdng ty Syngenta Viet Nam; 5 gid'ng dau dd trdng xen trong ngd: dau vin (Dolichos albus), dau dd {Vigna angularis).
CIAT 15160 (Centrosema macrocarpus), CIAT 2552 {Centrosema pubescens), CIAT 184 (Srylosanthes guianensis).
Phtfdng phap nghien ctfu: De nghien ctfu ddng thdi kha ning han che xdi mdn dat v i sinh trtfdng, ning suit ngd lai, chung tdi da bd tri 2 thi nghiem tren d l t cd dp ddc 12°.
Thi nghidm 1: Anh htfdng cua trdng xen de'n sinh trtfdng, ning suit ngd lai. Thi nghifm 1 cd 2 nhan td'theo kieu d chinh-phu, 3 lan nhac lai. Nhan to 1: eay hp dau trdng xen trong ngd lai cd 7 edng thtfc: 1) Dau dd, 2) Dau vin, 3) CIAT 15160,4) CIAT 2552,5) CIAT 184 xen ngd, 6) Dd'i chtfng - D/C 1 ngo lai thuan hang kep (40x30x1 OOcm), 7) D/C 2 ngd lai thuan hang ddn 70x30cm. Cac cdng thtfc trdng xen dlu xen trong ngd lai hang kep. Nhan td' 2: thdi diem trdng xen ciy hp dau chpn 3 thdi diem: Gieo ciing vdi ngd (Tl), sau gieo ngd 20 ngay (T2) va sau gieo ngd 35 ngay (T3).
Thi nghiem 2: Anh htfdng eiia trdng xen cay hp dau trong ngd df'n han che'xdi mdn.
Thi nghifm I ydu to, khd'i day dii, ngau nhif n, 3 lan nhac, trdng xen trong ngd lai
JChea. hq^ - ^Ang. nghe - MM tni&ni^
h i n g k6p vdi 7 edng thtfc: 1) Dau do, 2) D i u v i n , 3 ) C I A T 1 5 l 6 0 , 4 ) C I A T 2 5 5 2 , 5 ) C I A T 184, 6) D/C 1-ngd lai trdng thuan h i n g kep (40x30x1 OOcm), 7) D/C 2 ngd lai trdng thuan h i n g ddn (70x30em). C i c cdng thtfc trdng xem d l u trdng cay hp d i u sau gieo ngd 20 ngiy. Difn tich d cd sd 50m"
(5x I Om). Danh gii Itfdng dat xdi mdn thdng qua be htf ng d cudi cae edng thtfc.
Hai thi nghiem tren dtfdc tien hanh tai xa Easa huyen Ea Kar, ttf thing 5 n i m 2009 df'n 5 nim2011. SdUeu dtfdc xtf ly thd'ng ke bang IRRISTAT4.0.
Tuy nhien do dung Itfdng cua bii bao, chung tdi chi trinh biy ket qua cua thi nghifm 2.
3. Ket qua va thao ludn
3.1 Anh htfdng ciia cac loai cSy hp dau df'n kha nang che phu d l t
Bang 1: Kha ning che phu dSft cac cdy hp dau trdng xen trong ngd lai
C6ng thtfc
Do che phu Iu6'ng CSy Ho dau xen sau khi gieo (%)
IS ngiy 30 ngay 45 ngay
Thcfi gian phu kin dit(ngay)
Chi^u cao tham phu khi ciy ra
hoa (cm)
Dl D2 D, Dl Os
D„
D7
Dau do xen ngo Dau van xen ngo CIAT I'i^l xen ngo C!AT15160xenng6 Stylo 184 xen ngo Ngo thuan h^ng k^p Ngo lliuan hkng ddn
26 30 7 6 3 0 0
65 72 16 14 11 0 0
97 100 35 31 30 0 0
118 115 160 167
51 54 85 81 48 0 0 Kft qua bang 1 cho tha'y: do die tinh sinh
trtfdng cua cic ciy hp dau khac nhau nen kha ning che phu da't cua cic eay hp dau eung khic nhau. Hai gidng dau dja phtfdng (dau vin vi dau dd) sinh trtfdng rat manh d giai doan dau nen ty If che phu da't (ludng xen) cung rat nhanh: sau gieo 15-30 ngay ty If che phu dat bien ddng ttf 26-72% ludng xen, trong khi dd 3 cay hp dau (CIAT 2552, CIAT 15160 va Stylo 184 d giai doan dau sinh trtfdng rat cham nen ty If che phu ludng dat ratthap(ttf3-16'7r).
Sau khi gieo 45 ngiy, 2 gid'ng cay hp dau dia phtfdng (dau vin va dau dd) di che phii gan kin ludng xen (97-100%). trong khi dd 3 cay hp dau CIAT 25522. CIAT 15160 va Stylo 184 mdi chi che phu dtfdc ttf 30-35%
dien tich ludng xen.
Sau khi thu hpach ngd, cic ciy hp dau trdng xen (trtf Stylo 184) dlu bao oiim toin bd difn
tich trdng ngd. Hai gid'ng dau vin va dau do cd thdi gian phii kin da't ngan (ttf 115-118 ngay), cic ciy hp dau CIAT 25522, CIAT 15160 va Stylo 184 ed thdi gian phii kin da't dai hdn (ttf 160-167 ngay). (Juan sat tren ddng mdng cho thay: sau khi thu hoach ngd, cic eay hp dau CIAT 25522, CIAT 15160 va Stylo 184 vin phat trien tdt trong miia khd, dieu dd chtfhg td cac cay hp dau nay cd kha nang tao tham phu va bao ve da't trong miia khd rat td't.
Ve chieu cao thim phu: 2 cay hp dau CIAT 25522 vi CIAT 15160 dat chieu tham phu cao nha't (ttf 81-85cm), 3 cay hp dau Stylo 184, dau dd vi dau vin cd chieu cao tham phu tha'p hdn (ttf 4-54cm).
3.2 Anh htfdng cua cac loai cay hp dau de'n ltfdng dat hi xoi mon
Theo ddi Itfdng da't bj xdi mdn cua c i c cay hp dau. Ke't qua dtfde ghi nhan qua bang 2 va
bieudd I.
SO 1 - 2012 • THONG TIN KHOA HOC & C O N G NGHE
JGmtL ho^ - ^MvQ. nghe. - MM tnifyig
Bang 2: Ltfdng da't hi xoi mon qua cac thang ti cac cdng thtfc Ltfrfng dfit xoi mon (tS'n da't khd/ha) Cfiy hg dau trdng xen
Things Thing 9 Thing 10 Thing 11 Thing 12 T6ng cong Dau do xen ngo (Dl)
Dau van xen ngo (D2) CIAT 2552 xen ngo (D3) CIAT15160xenng6(D4) .Stylo 184 xen ngo (D5)
11,91 11,84 12.35 12.58 12,78
7,93 7,42 9,27 9,72 9,88
3,13 3,07 4,88 5,38 6,36
2.11 1,96 2.16 2.62 3,01
0,75 0,84 1.45 1,77 2,02
25,83 25.13 .30,11 32,07 34,05 Doi chtfng 2 (D/C 1)
Doi chufng 1(D/C2) CV </,
12,38 10,54 12,28 10,19
6,50
1.80(5%) 1,41
11,20 1,85
J7,57_
^ 3 4 _ 9,40
4,03 2,62
4.15 8,30
2,78 10,50
37^14 36.74 4,00
0,92 0,42 0,32 0,22
c
CI c
40-1 35 ' 3 0 - ' 2^- 20 15 10 5"
-- -
!
i L
- —
C .K Lon^i t l i i i f
• D a u do \ e n ngo
D D a u v a n xen ngo
B C I A T 25522 x c i i iigo
D C I A T 15160 xen ngo
D Stylo 184 \ c n n g 6
D N g o t r o n g thuan hang k e p
D N g o t r o n g thuan hang
Bieu dd 1: Ltfdng da't bi xoi mon cua cac cdng thtfc qua 1 vu Nhin chung, Itfdng dlt bi xdi mdn giam
dan qua cic thing ttf thing 8 de'n thing 12, d Ea Kar 2 thing 8,9 mtfa khi eao vi tap trung.
Tuy nhien khi cd trdng xen Itfdng xdi mdn giam rd ret. Giam xdi mdn dlt td't theo trat ttf:
dau vin > dau dd > CIAT2552 > CIAT15160 nhd kha ning sinh trtfdng nhanh, tao tham phu td't ciia cac gidng dau.
Thing 10, 11 va ca thing 12 vung Ea Kar van cd mtfa nhiftig Itfdng dit xdi mdn eua eic cdng thtfc trdng xen da giam ding ke (trtf gid'ng Stylo 184).
Nhtf vay, tit ea c i c cay hp dau trdng xen ngd deu cd tie dung ban che xdi mdn da't (sif sai khic cd y nghla thdng ke). Hai cdng thtfc xen dau vin vi dau dd Itfdng dlt bj xdi mdn it nhat (25,13-25,83 tan/ha), ke den la 2 edng thtfc trdng xen cay hp dau CIAT 25522, CIAT 15160 ed Itfdng da't bj xdi mdn ttf 30,11-32,07 tan dat/ha/vu) va Itfdng dat bi xdi mdn cao nhat l i Stylo 184 (34,05 tin dat/ha/vu) so vdi trdng ngd thuan 36,74- 37,14tan/ha/vu.
JChouhQ^- ^Mtg nghe MM tniefng
3.3 .Anh htfdng cua cac loai cay hp dau den Itfdng dinh dudng trong dS't bi xoi mon
Khdng chl xdi mdn ve Itfdng, stf xdi mdn cdn nguy hiem hdn ve xdi mdn dinh dtfdng
can thie't trong da't, ehung tdi da x i c djnh ham Itfdng cha't dinh dtfdng trong da't bj xdi mdn qua eac ehi tieu qua cic chi tieu cdban: mun, N , P A K : 0 ( b a n g 3 ) .
Bang 3: Ltfdng dinh dif9ng trong da't hi xoi mon qua cac cdng thtfc
Cong thtfc
Dau dd xen ngo Dau van xen ngd CIAT 2552 xen ngd CIA 115160 xen ngo .Stylo 184 xen ngd Ddi chtfng 1 Ddi chtfng 2
CV%
LSD (5%)
Ltfdng dinh dtfSng b|
Miin 384,90 371,90 493.90 554.80 578.90 664.90 650,30 3,90 36,52
N 24.50 24.10 27.40 29,80 32,00 42.00 38,90 4,00 2.20
xoi mon (kg/ha/vu) P2O5
12,39 11,80 13,84 14,10 15.31 17.45 16,53 4,00 1,04
K2O 29,70 23.37 24.38 27.57 37,45 37,88 41,51 3,90 2.20 Qua bang 3 cho thay: Itfdng mun da bj mi't
do xdi mdn d eic edng thtfc trdng xen cay hp dau bien dpng ttf 371,92 - 578,85 kg/ha so vdi 664,9 kg/ha eua trdng thuan vi giffa eic edng thtfc trdng xen sai khic cd y thdng kf. Trong cic cdng thtfc trdng xen, ban che ma t miin cao nha't la cdng thtfc dau vin vi diu dd xen ngd (371 vi 384 kg/ha), thip nha't la Stylo 184.
Xdi mdn Itfdng dam, lan de tieu, kali de tieu cung ttfdng ttf nhtf mun: cic cdng thtfc trdng xen dlu bi xdi mdn it so vdi trdng ngd thuan (N: 24.1-29,8 so vdi 42.0 kg/ha; P.O,:
11,8-14.1 so vdi 17.45 kg/ha vi K,0: 23.37- 29,7 so vdi 41.51 kg^a) trtf gid'ng stylo 184.
Vifc bd tri trdng xen c i c ciy hp diu trong ngd lai d vu 2 tren da't dd'e cd y nghia quan trpng, han che thip nhit Itfdng dlt mat di cung nhtf Itfdng dinh dtfdng da't bi xdi mdn, duy tri lau dii dp phi dat gdp phan nang cao hifu qua san xua't ngd lai.
3.4 A nh htfoTng ciia cac loai cdy hp ddu df'n l> hoa tinh dd't
Trdng xen eay hp dau edn eai thifn Iy hda tinh vi duy tri dp phi eiia dlt. Kft qua dtfdc ghi nhin qua bang 4a vi 4b.
Trtfdc thi nghifm thudc nhdm da't xim cic chi tieu ly tinh da't cho tha'y: Dung trpng va ty trpng ttfdng dd'i cao, dp xdp ttfdng ddi tha'p, tang dat canh tic mdng, dlt cd ty If cit vi set ttfdng ddi cao.
- Sau thi nghiem; da cd stf cai thien nhit djnh. c i c chi tieu dung trpng v i ty trpng cd xu htfdng giam, dp xdp cd xu htfdng ting, d i e bift d edng thtfc trdng xen dau do vi d i u van (38,82-39,46%). Ty If cit, thjt, set cd stf bie'n ddng khdng nhieu, rifng 2 cdng thtfc trdng xen dau dd v i dau van cd ty If thit l i 21,51-24,06% v i ty If c i t l i 45,27- 47.34%, stf bien ddng theo htfdng c i i thifn hdn. Tuy nhif n, mdi thtfc hifn 1 vu nfn c i c ehi tieu ly tinh d l t chtfa ed stf bie'n ddng rd rft, nhtfng ndu thtfc hien nhilu vu ket qui se tdt hdn gitfa c i c cdng thtfc trdng xen v i khdng trdng xen.
SO 1 - 2012 • THONG TIN KHOA HOC & CONG NGH6
DChoa hoe - C^ong infJte - MM tni&ng
B a n g Trdng xen TrU6c Ihi nghiem Sau Ihi nghiim
PL
D2 D3 D4 D5 D/C2 D/Cl
4 a : M d t sd' chi t i f u Iy t i n h dift trtftfc \h Dung trong
(g/cm^) 1.67 1,60 1,58 1,65 1,66 1,66 1,69 1,70
Ty trong (g/cm')
2.66 2,59 2,61 2,64 2,65 2,65 2,68 2.70
Do x6'p
(%)
37,22 38,22 39,46 37,50 37,36 38,06 36,94 36,04
s a u t h i
Set 32.07 30,67 31,15 29,33 29,79 30,88 29,67 28,95
n g h i f m Cfi'phatdfi'tC*)
Thjt 18.20 24,06 21,51 19.86 19,25 18,02 18,97 20,02
Cat 49.73 45.27 47..34 50,81 50,96 51,10 51,.36 51,03
Vl thinh phan hda tinh trtfdc vi sau thi nghifm, kit qui bing 4a cho thiy:
+ pH|„,: trtfdc thi nghifm li 4,22 thupc difn dlt ehua nhilu, sau thi nghifm pH^,| d cic cdng thtfc trdng xen cd xu htfdng tang (df chua dlt giim), song khdng ding ke vi d mtfc chua nhilu.
+ Him ltf<;ng miin (%) trtfdc thi nghif m li 2,66% d mtfc trung binh, sau thi nghifm cic cdng thtfc trdng xen hoic khdng trdng xen dlu cd xu htfdng ting (2,67-2,88%) so vdi trtfdc thi nhif m nhtfng vl n d mtfc trung binh.
+ H^m Itf^^ng N ttfng sd' (N%) trtfdc thi nghifm li 0,124% d mtfc trung binh. Cic cdng thtfc trdng xen cay hp him ltfdng dam ed cao hdn so vdi cdng thtfc ddi chtfng (ngd trdng thuin) li 0,127-0,134% nhtfng van d mtfc trung binh.
+ Ldn ttfng stf (PjO,^) tHf^ic thi nghifm li 0,072% d mtfc trung binh. Sau thi nghifm tat ci cic cdng thtfc trdng xen hoic khdng trdng xen him Itfdng lin tdng sded xu htfdng giim (0,56-0,65%) nhtfng khdng ding kl.
Rifng 2 cdng thtfc trdng thuan ngd lin ttfng sdgiimrdhdn.
Bang 4b: Mtft stf chi tifu hoi tinh trtftfc \k .sau thi nghifm
Tr<5n(j xen TrMic thi nghidm Sau thi nghidm
D l D2 D3 D4
m
D/C2 D/Cl
PHkrf 4.22 4.25 4.26 4,V.
4.27 4.58 4.22 4.21
Miin
2.66 2,88 2.71 2.68 2.69 2.67 2.46 2.49
Ttfng sd('/,) N PjO., 0,124 0,072 0.1.34 0,065 0.130 0,061 0,127 0.068 0,128 0,066 0,132 0,060 0,120 0,058 0,114 0.056
K2O 0,019 0,017 0,016 0,018 0,019 0,016 0.013 0.014
D i tieu (mg/lOOgiUrt)
P2O5 5,07 5.18 5.26 5.19 5,05 5,12 5.02 4.9'(
K2O 2,58 2.51 2.55 2,96 2.48 2.54 2..36 2,56
Cation trao d^i (ldi/ lOOg AUt) Ca++
4.90 4.54 4.75 4,25 4.11 4,25 4.04 .3,99
Mg++
1.37 1.38 1,32 1,28 1.^2 1.22 1.24 1.20
JChiUL hM. - ^Mvg nghe - MM tnOfng
+ Kali ttfng stf (KjO%) trtfdc vi sau thi nghifm d l u d mtfc ngheo, sau thi nghifm cd xu htfdng giim, nhtfng khdng ding ke.
-I- Ldn d l tifu trtfdc thi nghifm l i 5,07 mg/100 gam dat, sau thi nghifm cic cdng thtfc cd trdng xen dlu tang nhtfng van d mtfc nghfo. Rifng 2 cdng thtfc ddi chtfng (ngd trdng thuin) thi lan de tifu cd xu htfdng giam hdn so vdi trtfdc thi nghiem va so vdi eic cdng thtfc trdng xen.
•V Cac cation trao dtfi (Ca", Mg**) cQng cd stf thay ddi giffa trtfdc va sau thi nghiem nhtfng khdng ding ke, him Itfdng Ca" vi Mg** sau thi nghifm deu giim hdn so vdi trtfdc thi nghiem, die bift l i d cdng thtfc ddi chtfng (trdng thuan).
Tdm lai; Mdt sd chi tieu ly hoi tinh dat cd stf bien ddng trtfdc vi sau thi nghif m, ddng thdi giffa c i c edng thtfc trdng xen vi khdng trdng xen eay hp dau. Ddi vdi eic edng thtfc trdng xen cay hp dau mdt sd chi tifu ly hda tinh dat thay ddi theo chilu htfdng cd ldi. Ket
qua n i y phu hdp vdi c i c ket qua nghifn cu'u trtfdc day v l cay hp dau, cd y nghla trong vifc c i i thifn ly hda tinh da't.
4. Ket ludn
Trdng ngd lai hang kep vi hang ddn cho phep trdng xen cic loai cay hp dau de ban che xdi mdn, cai tao dat va cung cap chat xanh lim phan hffu ed.
- Cic eay hp dau dja phtfdng (dau vin va dau dd) cd tde dp sinh trtfdng nhanh: dp che phu ludng xen dat 100% vio thdi diem 45 ngay sau khi gieo va che phu kin dlt hoan toan sau trdng 115 ngay. Cic gid'ng CIAT 25522 vi CIAT 15160 che phu kin dat sau trdng 160-167 ngiy.
- Cdng thtfc trdng xen dau vin vi dau dd Itfdng dat bi xdi mdn tha'p nhit (25,13 - 25,83 tan dat khd/ha/vu) vi Itfdng dinh dtfdng mat di cung it nhi't. Dd'i vdi cic cdng thtfc trdng xen cay hp dau mdt sdchi tifu ly hda tinh d l t thay ddi theo chilu htfdng cd ldi, ed J^ nghla trong vifc cai thien \^ hda tinh dlt •
K£'T QUA THIET KE, CHE TAO VA DAMH GIA
THID'T BI LEM MEM HAT CA CAO MAMG SUAT 300KG/ME
Th.S Phan Thanh Binh, KS Phfim Van Thao va CS Vi$n KHKT Nong Ldm nghi$p Tdy Nguyen L D ^ t v d ' n d l
De tao ra dtfde sin phim ca eao chit Itfdng cao bf n canh yf'u to v l gidng, canh tic, mdi trtfdng thi cdng doan sd c h l hat ca eao (die bift li giai doan ii If n men) li ri't quan trpng qui trinh niy inh htfdng trtfe tif'p df'n chit Itfdng sin phim hat cao cao cudi ctfng. Trong giai doan If n men cic phin tfng sinh hda xiy ra vi lim bifn dtfi cic thinh phan hda hpc, .sinh hpc trong t l b i o nhan, ttf dd tao nfn cic tiln htfdng vi sd cd la, die bift li acid amine vi dtfdng khtf (Wood and Lass, 2001). Hifn nay d Vift Nam giai doan len men hat cacao thtfdng dtf(?c thtfc hien trong cic dung cu thdng thtfdng nhtf: thiing gd, gid tre, sin go, thtfng nhtfa, sin xi ming, sin dlt... Cic dung cu niy rf, d l kifm, vi stf dung de ding, phtf
hdp vdi giai doan dau cua sin xult ca cao khi sin Itfdng cdn thip. Vifc nghifn etftf vi stf dung thiet bj nhlm giim nhan cdng, ting chit Itfdng sin phim chtfa dtfdc thtfc hifn nhilu vi phd bien. D l tao ra dtfdc nhffng thiet bi phtf hdp vdi dilu kifn ciia Vift Nam, cd gii thinh ha can phii ed nhffng nghifn ctfu eu the, nhffng thiet kf' phtf hdp. Diy li mft trong nhffng muc tifu cua nf i dung thilt k l , c h l tao cic thiet bj If n men hat ca cao phii hdp vdi dilu kifn Vift Nam thupc d l tii "nghiSn cihi Ung dung enzyme trong quti trinh sa ch^ hgt cacao din&ng cao chdt Iupng vd tdng hi$u qud kinh te" do Vifn Khoa hpc Ky thuit Ndng Lam nghifp Tiy Nguyfn chii tri dtfdc thtfc hifn tff nim 2009-2011. D l tii di btfde diu nghifn ctfu thilt k l , c h l tao dtfdc thiet bj If n
SO 1 - 2012 • T H O N G T I N KHOA HOC & CONG NGHE 111
