KHOA HOC CONG N G H E
D A I V H G I A ALVH HLTOIVG C U A P H A M H L I U C O DEIM BAM X U A T C H E S A C H - A M TOAIV T A I X A T A M CUOIVG,
THAMH P H d T H A I M G U Y E M
D^ng Thi Thai m\ Uokng Quy N^i^'- Cao Thi Nhung Ttang^ Dong Van TVang^, E)^ TW Lan^
TOMTAT
Viec san xuat va che bien che chua dat hieu qua va chat luong cao do trong qua trinh cham soc, nong dan bon phan chua can doi, bon nhieu dam (ure) lam cay mat can ddi ve dinh duong (gay ra thira dam) anh huong d^n sinh trucmg cua cay, cay di bi nhi§m cac loai sau, benh hai. Chinh vi vay viec su dung phan huu ca se giup cai thien nang suat va chat luong che hon. San xuat che an toan theo quy trinh VietGAP dang duoc thuc hien b nhieu dia phucmg tren ca nuoc, trong do anh huong cua phan bon den nang sual va chat luong cay che dupe coi la van de quan trong nhat trong quy trinh nay. BMT18 la phan bon moi g6m c6: than sinh hoc, phan huu co sinh hoc, phan khoang va duoc sir dung cho cay che trong nghifin cuu nay. KSt qua cho thay tren nen 2 tan phan NTRl/ha bon them 8 tan phan EMT18 cho giong che LPDl da tang nang suat va chat luong che cao nhat so v<ii cac li4u luong phan BMT18 khac, cao hon ca dot chiing bon 10 tan PC +420 kg N +210 kg P,05 + 280 kg Kfi. Bon phan BMT18 da nang cao hieu qua kinh te cua san xuat che tai xa Tan Cuong thanh pho Thai Nguyen, gop phan nang cao hieu qua tr6ng che bang su dung phan bon huu CO khoang, han ch^ 6 nhigm moi truong, tien toi san xuat che an toan va ben vung.
Tii^oa: Phan bon than sinh hoc, cay che, VietGAP, chat lugng, xa Tan Cuong.
Viing san xuat che an toan Tan Cuong - Thai Nguyen la noi co dien tich trong che thupc loai lon nhat tinh Thai Nguyen, tuy nhien nguoi dan san xuat che chua theo quy trinh VietGAP va che chua dam bao chat luong nhu: con su dung phan chu6ng tuoi va su dung nhieu phan khoang (phan hoa hoc)...
Trong qua trinh cham soc, nong dan bon phan chua can doi, bon nhi^u dam (ure) lam cay mat can doi ve dinh duong (gay ra thira dam) anh huang den sinh truong; cay dl bi nhilm cac loai sau, benh hai dan den nang suat con han che, chat lupng san pham chua cao. Nghien cuu cho thay anh huong cua phan bon den nang suait va chat lupng cay che dupe coi la rat quan trpng cho qua trinh sinh truong va phat tnen cua cay che cung nhu chat luong la che tuoi [2], Phan him co BMT18 do Truong Dai hpc Nong Lam -- Dai hoc TTiai Nguyen nghiSn cuu va san xuat. Phan CO ham luong nito va kali oxit cao nen co the dung hon thiic cho cay tr6ng. Phan huu ca da duoc nghien
Khoa Quoc te, Dai hpc Thai Nguyen - Khoa Moi tarong, Truong Dai hpc Nong Lam Thai Nguyen
Email: [email protected]
CUU su dung cho nhieu loai cay trong, nhung chua nghien ctm xay dung quy trinh ky tiiuat bon phan cho cay che. Thanh phan cua phan htm ca moi gom:
than sinh hoc, phan him co smh hpc va phan khoang.
De xay dung quy trinh ky thuat sii dung phan bon nay cho cay che noi chung va cay che tai xa Tan Cuong noi rieng can phai co nghien cuu xac dinh lieu lupng, thai gian va each su dung phan bon den cay che.
2 . PHUOniG PHAP NGHIEN CUU
Nghien cuu nay danh gia anh huong cua to hop phan NTRl, BMT18 (thanh phan ciia phan huu co moi gom: than sinh hoc, phan him co sinh hpc va phan khoang) dfen sinh tmong, chat luong va hieu qua kmh te cay che. Gidng che LDPl dupe su dung trong thi nghiem.
- Phuang phap thu thap so Hdu thu cap dupe su dung de thu th&p toan bp cac thong tin, tai lieu lita.
quan. Ap dung phuong phap phan tich sd, ung dung pham mem xay dung mo hinh phan tich chat lupng la che. Phuang phap xir ly va phan tich sd lieu dupe su dung de phan tich cac thong sd hang phan mem Excel 2010.
- Phuong phap thuc nghiem tren cay che:
KHOA HOC CONG NGHE
Cong thirc thi nghiem: Thi nghiem gdm 4 cdng thiic, CO 3 cong thiic su dung phan hiiu co co n^n phan bon sii dung phan NTRl [2,4].
CTI; Bon 2 tan NTRl + 6 tan BMT18.
CT2: Bon 2 tan NTRl + 7 tan BMT18.
CT3: Bon 2 tan NTRl + 8 1 ^ BMT18.
CT4 (d/c): Bon 10 tin PC + 420 kg N +210 kg P A + 280kgK2O.
- Tlii nghiem bd tri theo phuong phap khdi nglu nhi^n day du, 3 lan nhdc lai.
Cach bon phan: Phan NTRl bdn thiic lan 1 vao thang 2-3 vdi luong 60%, con lai 40% bdn vao thang 7 hoac thang 8. Phan BMT18 chia ddu bon 6 liia trong nam, bdn sau khi hai 6-7 ngay. Cdng thiic ddi chung, bdn lot toan bd phan chudng + 60% lan vao thang 2 hoac thang 3, cdn 40% lan hdn vao thang 7 hoac thang 8, Itrong phan khoang cdn lai chia deu hdn cho 6 Ilia trong nam [4].
- Phuong phap khac: Tinh hidu qua ciia tOmg cdng thiic bon phan bon. Lpi nhuan (RVAC) dupe tinh bang tdng thu nhap (GR) trir di tong chi phi CrC):RVAC = GR-TC[61.
- Phuang phap xac dinh: Diing phuong phap bam be dk xac dinh do non gia ciia blip che. Mdi lan nhac can 50 g mku thuc hien ham be sd blip cua mau. Ddi vdi cudng be ngupc ttr cudng hai den dinh blip, ddi vdi la bam be tir cudng la ddn dau la, phan bam be cd xo g6 la phan banh te cd khdi luong PI, phan non cd khdi lirpng P2 [3].
(Pl + P2=50g).
Ty le (%) bup banh te = Pl:50xlOO.
Ty le (%) blip non = P2:50xl00.
- Can cii vao ty 16 banh te dd danh gia pham cap blip theo timg cdng thiic.
Tieu chuan che dot tuoi dupe quy dinh (theo TCVN1053- 71) nhu sau: Ty le cac thanh phan blip trung bmh la bmh quan lan lupt cac gia tri 6' 3 lan nhac lai. Theo doi cac chi tieu chat lupng gidng che.
Chat luong che nguyen heu duoc phan tich cac chi tieu sinh hoa: ham lupng tanin, chat hoa tan, dudng tdng sd, axit amin tai Vien Khoa hpc Ky thuat Ndng Lam nghiep mien mii phia Bac [2]. Theo doi cac chi tieu phan tich dat: lay mku dit d 2 tdng dp sau: 0- 20 cm, 20- 40 cm. Lay hai lan: Lan 1 trud'c khi lam thi nghiem, lan hai sau 1 nam. Phan tich ket qua theo theoTCVN1053-71 [1].
3. KET QUA NGHIBU CUU VA THAU LUAN
3.1. Anh htrdng ciia lieu lugrng phan BMT18 d^n sinh trudng ciia cdy che
Theo doi su sinh trudng cua cay che thi nghiem da thu dupe ket qua d bang 1. O giai doan thdi ky kinh doanh (8 - 10 tuoi) cay che cho nang suat chua cao, do hp khung tan dang phat trien, bien phap bdn phan thich hop cho che d giai doan nay la vo cung quan trpng, tao dieu kien thuan lpi dk cay che phat trien bd khung canh khoe va cho nang suat cao.
BanK 1. Anh huong ciia Ufa liBjng phan BMT18 toi sinh truonK than ctah chi Cong tllijc
CTI (2 tan NTRl + 6 tan BMT18)
CT2 (2 tan NTRl + 7 tin BMT18)
CT3 (2 tan NTRl+ 8 tan BMT18)
CT4 (d/c) (420 kg N + 210 kg P A + 280 kgjKjO + lO tan phan chuong
P LSD„„.r, CV(%)
B/Kthan (cm) Sau TN 2,57"
2,63"
2,80*
2,48
>0,05 0.31
6,8
%so voi DC
103,6 106,0 112,9 100
Cao cay (cm) Sau TN 80,58»
84,38"
87,73*
76,51
>0,05 8,74 6,1
%so vmDC
105,3 110,2 114,6 100
Rong tan (cm) Sau TN 96,46"
97,56"
100,5"
94,13
>0,05 11,08 6,6
%so voi DC
102,4 103,7 106,7 100
Be day tan (cm) SauTN
30,27"' 31,25*
32,16*
28,86
<0,05 1,76 3,3
% so voi DC 104,8 108,2 111,4 100
(Ket qui phan ti'ch nam 2018)
NONG NGHIEP VA PHAT TRIEN NONG THON - KY 2 - THANG 12/2019 105
KHOA HOC CONG N G H £
- Cac chi tieu dudng kinh dian, chieu cao cay, do rpng tan cac cong thiic 1, 2, 3 deu cao han cong thuc ddi chiing, nhung sai khac khong cd y nghia d miic dp tin cay 95%.
- Trong 4 cong thiic thi nghiem, CT3 c6 do day tan cao nhat 32,16 cm, tang 11,4% so vdi ddi chung, thap nhat a CTI dat 30,27 cm, nhung van cao hon 4,8% so vdi ddi chung nhtmg khong cd y nghia.
Nhu vay so sanh giiia cac cong thiic thi nghiem ta thay CT3 cd cac chi hdu smh trudng cao nhat.
Dieu dd chiing td sir ket hpp cua bdn phan huu co cd
su dung phan NTRl va BMT18 theo lupng bdn mot each hpp ly, da cd su tac ddng tich cue ddn cac chi tieu sinh trudng. Didu nay ddng nghia vdi kha nang cay che cho nhieu dot canh sinh trudng. cho nhieu blip la tien dd cho nang suat cao.
3.2. Anh hudng cua phin NTRl, BMT18 ddn cac yeu td ciu t h ^ h nSng suat, chat lupng v^ hi^u qua kinhtd
3.21 Anb budng pban NTRl, BMT18 den chat lugng cbi
Ket qua thuc nghiem dupe trinh hay tai bang 2.
Bang 2. Anh hudng cua phan BMT18 den thanh phan cff gidi blip che
Bon vi:
Cong thitc CT 12 tan NTRl + 6 tan BMT18
CT2 2 tan NTRl + 7 tan B1VIT18
CT3 2 tan NTRl + 8 tan BIVIT18
CT4 (d/c) 420 kg N + 210 kg PjOs + 280 kg KjO +10 tan PC
T6m che 7,46 7,41 7,83 6,78
L a l 8,31 8,27 8,85 7,92
La2 20,82 21,68 22.05 21,35
La3 34,4 34,39 32,43 33,07
Cuong 29,01 28,25 28,84 30,88 (Kit qui phin ti'ch nam k Blip che gidng LDPl cd la 3 va cudng la thanh
phan chiem ty le cao nhat, hai thanh phan nay tuong duong nhau. Dieu nay chiing td de cd nguyen heu thuan loi cho che bien chi nen hai blip non (tdm +2 la). Trong cac cong thiic thi nghiem, CT3 cho ty le tdm + la 1 + la 2 cao nhat la 38,73%, cd nghia la ty le la 3 va cuong thap hon cac eong thiic khac. Do vay bdn phan theo CT3 se cho chat luong nguydn lieu de che bien che kho.
J f
^
^^ ^
_,_;^SS>^
..TT"..
— » — C T I
CT3 - CT4
Anh hudng cua Heu luong BMT18 den dpng thai
tang trudng chidu dai blip: Hinh 1. Anh hudng cua Mu luong phSn BMTIS tdi sinh trudng ddn ddng thai tang tmdng chi^u dai
blip (cm)
Bang 3. Anh huong cua lidu lugng phan BMT18 d^n ddng thai tang trudng chidu dai blip (cm) Cong thuc
cn
CT2 CT3 CT4
5 0,89 1,11 1,23 0,72
10 1,32 1,53 1,68 1,12
15 1,88 2,17 2,65 1,69
20 2,93 3,18 3,74 2,63
25 4.34 4.63 5.14 4,04
30 5,76 6.03 6.45 5.42
Su tang truong chigu dai cua blip che la yeu td den liia hai va thai gian hai. ddng thoi lien quan toi quan trong trong suot qua trinh sinh truong va cac bien phap ky thuat canh tac Ai cay che phat phat h-ien cua cay clie. Day la yeu td quyet dinh tri^n tot [5].
KHOA HOC CONG NGH|
Tren CO sd dd da tidn hanh theo doi sinh trudng blip che cua gidng che LDPl. Ket qua dupe the hien trong bang 3 va hinh 1. Ket qua cho thay miic tang trudng chieu dai blip ciia gidng LDPl cd su dign bien theo thdi gian nhu sau: trong 15 ngay dau khong cd su chenh lech ro ret giua cac cong thiic, CT3 (2,65 cm) cd miic tang trudng cao hon so vdi cdng thiic ddi chiing, thap nhtit dcdng thii'c ddi chtrng (1,69 cm).
Tii ngay 30 trd di chidu dai blip che d cac cdng thiic da cd su tang tnidng kha nhanh; CT3 cd su vupt Bang 4. Anh hudng cua lidu lupng phan
trdi cao nhat, dat 6,45 cm cao hon ddi chiing 1,03 cm;
CT4 ddi chiing van la cong thiic thap nhat (5,42 cm).
Ket qua tren cho thay CT3 cd miic tang hirdng chieu dai blip cao nhat.
3.2.2. Anh hudng ciia heu lugng phan BMT18 din thanh pban sinh hda trong blip cbi
De danh gia chat lupng blip che da tien hanh phan tich thanh phan sinh hoa biip che; ket qua d- bang 4.
BMTIB d^n chi tidu sinh hda blip che
Cong ihiic CTI 2tanNTRl + 6tanBMT18
CT2 2tanNTRl + 7tanBlylT18
CT3 2tanNTRl + 8tanB]VlT18
CT4 (d/c) 420 kgN + 210 kg P2Os+280 kg
K2O + 10 tin PC
Tanin (%) 31,65 31,40 31,59 32,20
Chat hoa tan(%)
41,25 40,85 42,70 41,64
Axit amin
(%)
2,80 2,64 2.27 2,23
Duong khu
(%)
2,27 2,39 2,48 2,46
Dam tong sd
(%)
0,53 0,49 0,48 0,26
Nhin chung cac cong thiic thi nghiem bdn phan BMT18 da iam giam ham lupng tanin, axit amin, dam; tang chat hda tan, dudng khii, ddng nghia vdi viec chat lupng che phan nao da dupe cai thien.
(Kit qui pban ti'ch nam 2018) 3.2.3 Anb budng liiu luongphSn BMT 18 din nang sudt ebi va hiiu qud kinh ti
Bang 5. Anh huoDE ctia Mu luong phan BiVITlS den nang su^t vA c ^ y^u to cau th^nh Cdng thiic
cn
2 tan NTRl + 6 tan BMT18 CT2 2tanNTRl + 7tanBMT18
CT3 2 tan NTRl + 8 tan BMT18
CT4 (d/c) 420 k g N + 210 kg P2O,, + 280 kg
K.,0 + 10 tan PC P LSD„„, CV(%)
Matdd biip/liia/m^
327 334 341,4 317,26
>0.05 29.41 4,67
Khoi lugng (g/biip) bup tom
+2 la 0,92 0,94 1,05 0.92
>0,05 0,2 10,9
bup tdm +3 la
1,08 1,14 1,21 1
>0,05 0,17 7,92
Nang suat cong thiic (kg/CT/2 Ilia) 15,8 16,20 21,30 14,46
<0,05 3,38 11,1
nang su^t Nang suat
thuc thu (tan/ha/2 Ma) 4,15"- 4,48"'
5,62"
3,73
<0,05 0,48 6,75 (Ket qua phdn tich nam 2018)
NONG NGHIEP VA PHAT TRIEN NONG THON - KY 2 - THANG 12/2019 107
KHOA HOC CONG N G H |
chac ehan d miic dp tin cay 95%. CT3 dat nang Trong cac cong thiic bdn td hpp phan huu co
mat do biip/liia/m^ cao hon cong thiic ddi chiing, cao nhat d CT3 dat 341,4 biip/liia/m^ cao hon CT4 ddi chiing (317,26 biip/Iiia/m^, nhung sai khac khong cd y nghia a miic do tin cay 95%.
O ckc cdng thiic bdn td hpp phan huu ca nang suat che deu cao hon cdng thirc ddi chiing d miic dp 95%. Trong dd cao nhat b CT3 (21,30 kg/CT/2 liia), thap nhat d cong thiic ddi chiing (14,46 kg/CT/2 Ilia).
Kdt qua d bang 5 cho thay nang suat thuc thu d cac cong thiic thi nghiem dao dpng tir 3,73 - 5,62 tan/ha/2 liia, trong dd b cac cdng thiic bdn td hpp phan hiiu ca ddu cao hon so vdi cong thiic doi chiing
Bang 6. Hieu qua kinh td bdn phSn huu ca cho cay che
suat thuc thu cao nhat 5,62 tan/ha/2 lira, cao hon CT4 doi chiing, thap nhat d cong thiic ddi ehirng (3.'-5 tan/ha/2 Ilia).
Ket qua tinh toan hieu qua kinh te d bang 6 cho thay, loi nhuan thu dupe d cac cdng thuc thi nghiem dao dang tir 90,133 - 142,650 trieu dong/ha, tt-ong dd cao nhat a CT3 (142,650 trieu/ha), tidp den la Crr2 (107,100 ttieu/ha) va CTI (96,700 ttieu/ha), thap nhat a CT4 ddi chiing (90,133 ttieu/ha).
Nhu vay cd the thay rang CTTS bdn 2 tan NTRl + 8 t£tn BMT18 cho lpi nhuan cao nhat can duoc dua vao ling dung san xu^t (Bang 6).
DVT: 1000 VNB
Cdng thli'C
cn
2tanNTRl+6tSnB]MT18 CT2 2tanNTRl + 7tiinBMT18
CT3 2 tan NTRl + 8 tin BMT18
CT4 (d/c) 420 kgN + 210kgP2O5 + 280 kg KjO +10 tan PC
Muc chi Phan
bon 27.000 30.500 34.000 18.017
Cham sdc 30.000 30.000 30.000 30.000
Thu hai 40.700 45.700 55.700 36.000
Tdng chi 97.700 106.200 119.700 84.017
Nang suiit (tan/ha/2
liia) 4.32 4,74 5,83 3,87
Tdng thu
194.400 213.300 262.350 174.150
Loi nhuan 96.700 107.100 142.650 90.133
4 . KET L U A N
Khi bdn phan BMT18 sinh trudng cua gidng che LDPl cao hon so voi cong thiic ddi ehiing va cao nhat a cdng thiic 3 bdn 2 tan NTRl + 8 tan BMT18;
cay sinh trudng tdt nhat. Miic tang trudng ehieu dai blip cua gidng LDPl cd su di^n hien dieo thdi gian nhu sau: trong 15 ngay dau khong ed su ehenh lech ro ret giua cac cong thiic; CT3 (2,65 cm) cd miic tang trudng cao hon so vdi cdng thiic ddi chiing; thap nhat a cong thiic ddi chiing (1,69 cm). Tii ngay 30 trd di cac cdng thiic da cd su tang trudng kha nhanh; CT3 cd su vupt trdi cao nhat, dat 6,45 cm va cao hon ddi chiing 1,03 cm; (yT4 ddi chiing vin dat thap nhat (5,42 cm). Crr3 la cong thiic cd miic tang trudng chieu dai blip cao nhat.
Cac cdng thuc bdn phan BMT18 cho nang suat thuc thu dao dong tii 3,73 - 5,62 tan/ha/2 liia, trong
do cac cong Ihiic bdn td hpp phan hmi ca deu cao hon so vdi cdng thiic ddi chiing d miic dp tin cay 95%.
Nang suat thuc thu cua CT3 bdn 2 tan NTRl + 8 tan BMT18 dat 5,57 tan/ha/2 liia, cao hon cac cdng thiic thi nghiem cdn lai va cao hon so vdi ddi chiing. Bdn 2 tan NTRl + 8 tan BMT18 hap ly cho hieu qua kinh td cao nhat, dat 158,800 trieu/ha. Nhin chung ch^t lupng che khi bdn BMT 18 da cd thay ddi theo chidu hudng tot htm va bdn 2 tan NTRl + 8 tan BMT18 cho chat lupng hieu qua tdt nhat cdn duoc ap dung vao gidng che LDPl.
Lpi nhuan thu dupe d cac cong thiic su dung phan bdn BMT18 dao ddng tti 90 - 143 tiieu dong/ha. Bdn phan hiru ca hop ly dat hieu qua kinh te cao tren cay che tai xa Tan Cuong, gdp phan nang cao hieu qua trdng che bang sir dung phan bdn huu ca khoang, han chd gay 6 nhiem moi tnrdng, tien tdi san xuat che an toan va ben vung.
KHOA HOC CONG N G H |
TAI UEU THAM KHAU che. Vien Nghien ciiu Che 1989 -1993. Nha xuat ban 1. Bp Khoa hoc va Cong nghd (1986). Tieu Nong nghiep. Ha Noi.
chuan Viet Nam TCVN 1054 - 86, TCVN 1053 - 71. 5. Nguyin Tu Siem, Nguyin Thi Thanh Ha va 2. Btii Dinh Dinh, Vo Mmh Kha, Le Van Tidm Th^i Phien (1996). Phan tich each bdn phan tham (1993). Phan lan ch?m tan - mdt sd loai phan cd hidu canh cho che kinh doanh 1993 - 1996. Tap chi Canh qua h-en dat chua. Tap chi Khoa hgc Dat sd 3, Ha tac ben vung tren dat ddc d Viet Nam - NXB Ndng Ndi. nghidp.
3. Dudng Hdng Dat (2004). Cay che: Cac bidn 6. Yoshikazu Kirivi'a, Akio Merita, Hh-omi Yokota phap nang cao nang suat va chat lupng san pham. (2004). Aluminum activate antioxidate system of tea NXB Lao ddng-Xa hdi. Pl^^t. Proceedings of 2004 hiter. Conference on Tea culttire and science. November 4-6. 2004. Shizuoka.
4. Dd Van Ngpc (1993). Cac bidn phap ky thuat nham su dung cd hieu qua nuong che. Ket qua nghien ciiu khoa hpc va trien khai cong nghe va cay
Japan, pp 177-1
THE IMPACTS OF ORGANIC FERTILIZERS FOR SAFE (CLEAN) TEA PRODUCTIGN TAN CUONG COMMUNE, THAI NGUYEN CITY
Dang Thi Thai HaS Hoang Quy Nhan^
Cao Thi Nhung TrangS Dong Van Trang^, Do Thi Lan''
^International SchoU, Thai Nguyen University
^Faculty of Environment, Thai Nguyen University of Agriculture and Forestry Email [email protected] Summary
Vietnam is a country with the fourth largest tea growing area (121,649 hectares). Thai Nguyen is the second largest tea growing province in Vietnam, after Lam Dong province. Therefore, the economic value from tea plants in TTiai Nguyen provmce in particular and the country in general is very much. Safe tea production under the VietGAP process is being publicly and socially concerned. In which the influence of ferttlizer to the yield and quality of the tea plant is being considered as the most important issue. BMT18 is a new product that includes; biochar, bio-organic fertilizer and mineral fertilizers, using this fertilizer for tea plants in general and tea plants in Dai Tu district m particular. On foundation of 2 tons NTRl fertilizer/ha the dose 8 tons BMT18 fertilizer increases the yield and quality of LPDl tea variety compare with another doses, higher the dose 10 ton manure +420 kg N +210 kg P2O5 + 280 kg KgO/ha. This study aimed to assess the effects of doses of fertilizer to the yield and quality of tea plants. BMT18 fertilizer is suitable to place high economic efficiency on tea plants in Tan Cuong, contribute to improve the efficiency of tea cultivation usmg mineral organic fertilizer, bmit environmental pollution, and proceed to safe and sustamable tea production.
Keywords: Biochar fertilizer, tea tree, VietGAP, quality. Tan Cuong commune.
Ngudi phan bi§n: TS. Bin Huy Hidn Ngdy nhan bii: 7/10/2019 Ngdy thdng qua phan bifin: 8/11/2019 Ngdy duydt dang: 15/11/2019
N O N G NGHIEP V A PHAT TRIEN N O N G THON - KY 2 - THANG 12/2019 109
