IXIGHIErVI CIJU XAC DflVH TO H O P PHAIM BDIM IVPK THICH H Q P CHD GIOiVG CA CHUA Hidi TM 1 B 9 TROIMG VU XUAlM HE S O O G V A V U DOIMG XUAIV B 0 0 G - B 0 0 7
TAI THAIMH PHO THAI IMGUYEIM
Nguydn Thi Mao\ Nguyen Thiiy Ha\ Nguydn Viet Hung' TOM TAT
Ket qua nghien eu'u xac dinh to hgp phan bon thich hgp cho giong ca chua TN129 vu xuan he 2006 va dong xuan 2006-2007 cho thay, to hgi^ phan bon khac nhau co anh huong kha ro toi thai gian sinh U-uong, nang suat va chat luo-ng qua. Trong do d cac cong thirc tir 5 den 8 (voi lugng dam bon 120 kg/ha) thi ca chua co thoi gian sinh truang dai ban so voi cac cong thirc tir 1-4 Ougng dam bon la 90 kg/ha) va doi chimg tir 9-13 ngay. Cong thirc 8: nen + 120 kgN + 100 kg P^O; -i-150 kg ICO cho nang suat cao nhat trong ca 2 vu (tir 38,5- 46,6 tan/ha), cao hon doi chung (15 tan phan chuong +90 kg N-i-60kg PoO;+120kg KoO/ha) va cac cong thuc til 1-4 o mirc tin cay 95%. Day cung la to hgp phan bon cho lai thuan cao nhait, dat tir 61,6-70,0 trieu d/ha. Cac to hop phan bon deu co anh hu'ong tot den chat lugng qua ca chua, ham lugng cac chat chinh deu cao hon so voi ddi chung. Bon phan cho gidng ca chua TN129 nhu cac to hgp tren vin dam bao an toan thuc pham. Ket qua nghien cim cho thay, nen phan bon 25 tan phan chuong hoai •+ 8(X) kg voi bot neu bon 120 kg N + 100 kg P2O5 + 150 kg ICO cho 1 ha la thich hop cho giong ca chua TN129 trong vu xuan he va dong xuan tai Thai Nguyen.
Tir khoa: Ca chua. dong xuan, xuan he, ThaiNguyen.
I. DAT VAN OE
Ddi voi cay c i chua viec xac dinh lupng phan bdn can ddi, thich hpp cho timg gidng la didu rit can thiet, gdp phan nang cao hieu q u i cua phan bdn v i nang suit, chit lupng qua [7]. Lupng phan bdn hpp ly se thiic diy k h i nang sinh tmdng phat trien tdt, tang kha nang chdng chiu benh cua cay, dac biet giim dang ke sd cay hi berth chdt xanh vi benh xoan la, tang k h i nang ra hoa tao qua nhieu, tiem nang cho nang suit ldn, v.v. [2], [3]. Vi vay can cii vio dieu kien timg dia phuong, dac diem timg gidng can x i c dinh lugng phim bdn phii hgp nhit de tao didu kien cho ca chua sinh trudng phat trien thuan lpi va cho nang suit cao.
Dya tren ket q u i khao nghiem tap doin gidng ca chua mdi qua 4 vy tai Thii Nguyen, gidng c i chua TN129 dugc the hien l i gidng cd trien vgng [4]. De gdp phin hoin thien quy trinh ky thuat cho gidng nay tai Thai Nguyen tren co sd" da cd ket qua thi nghiem ve cac miic bdn dam, lan, kali rieng re qua 2 vu tai Thii Nguyen, da bd tri them thi nghiem nghien citu anh hudng cua td hgp NPK den sinh trudng v i phat trien cita gidng c i chua TN129 vu xuan he (XH) 2006 v i dong xuan (DX) 2006-2007 tai Thai Nguyen. Duoi day la kdt q u i da dat duge.
II. nidi DUIMG VA PHUOI\IG PHAP NGHIEN CUU
Dai hoc Nong lam Thai N^UN en
1. Ngi dung nghien ciiu
- Theo doi i n h hudng cua c i c td hgp phan bon khac nhau den cac giai doan sinh trudng phat trien, k h i nang chdng chiu, nang suit v i chit lugng qua cita gidng c i chua TN129.
- So bd hach toan kinh te d' cac td hgp phan bdn k h i c nhau.
2. Phuong phap nghien cim
Thi nghiem dugc trien khai tren d i t ngheo dinh dudng, chan mdng liia miia sdm - rau ddng - ci chua xuan he v i lua miia xuan sdm - c i chua ddng xuan - cay m i u tai trudng Dai hpc Nong lam Thai Nguyen. D i t cd thanh phin co gidi nhe, pH^ci = 3,80;
N tdng sd = 0,09%, K tdng sd = 0,50%, P tdng sd = 0,03%, mim = 1,28%.
Thi nghiem gdm 9 cong thiic dupe trdng theo phuong p h i p khdi ngau nhien hoan toan
(Randomized complete block design - RCBD), vdi 3 lin nhie lai.
- Dien tich 1 d thi nghiem: 1,6 m x 7,8 m = 12,5 m^
* Nen: 25 tan phan chudng hoai muc + 800 kg voi bdt
CTI: Nen + 90 kg N + 80 kg P2O5 + 120 kg K2O CT2: Ndn + 90 kg N + 80 kg P2O5 + 150 kg K,0 CT3: Nen-H 90 kg N + 100 kg P.O.; -h 120 kg KjO CT4: Nen + 90 kg N -i-100 kg P2O5 + 150 kg KjO CT5: Nen -H 120 kg N -H 80 kg P2O5 -t-120 kg K2O CT6: Nen + 120 kg N -H 80 kg P2O5 + 150 kg K2O
22 NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 1/2011
KHOA HOC CONG NGHE
CT7: Nen + 120 kg N -^ 100 kg P2O5 + 120 kg KjO CT8: Nen + 120 kg N -^ 100 kg P2O5 + 150 kg K.O CT9 (d/e): 15 tin phan chuong -1-90 kg N-i-60 kg P2O5+I2O kg K20/ha
- Cac ehi tieu vi phuong phap theo doi tuan theo Tieu chuin lOTCN 219-2006: Gidng ca chua - Quy pham khio nghiem gia tri canh tic va gia tri sii dung [1].
- Chi tieu vd sau benh hai dupe thyc hien theo phuong phap hien hanh cita Vien Bao ve Thyc vat (BVTV) [6].
- Tinh hieu qua kinh te: tdng thu - tdng chi - Bien phap ky thuat ap dung
Bdn lot toan bp phan chudng -1- lan -r 20% dam + 30% kali.
- Voi hot: 800 kg/ha, ric trong khi lam dit
- Bdn thiic: dgt 1 khi cay hdi xanh: 10% dam; dgt 2 khi cay ra nu: 20% dam, 20% kali; dgt 3 khi cay ra qui rd: 30% dam, 30% kali; dpt 4 sau khi thu qua dpt 1: bdn ndt sd cdn lai.
III. KET QUA NGHIEN CUU VA THAU LUAN
1. Cac giai doan sinh trudng, phit trien cua gidng ca chua TN129 vu xuan he 2006 vi vu dong xuan 2006-2007 tai TTiai Nguyfin
Trong vy dong xuan 2006-2007, ket qui theo ddi cac giai doan sinh trudng, phit trien cita gidng ci chua TN129 d cic td hpp NPK khic nhau dugc the hien d bang 1.
Bang 1. Cac thdi ky sinh trudng va phat trien cua giong ca c
yhi tieu
C6ng\
thiic \ 1 2 3 4 5 6 7 8 9 (D/c)
:huaT^ fl29acac Thdi gian tir trdng den
Rahoa 37 37 36 36 34 34 33 33
Dau qua 46 46 45 45 47 47 46 46 37 ' 47
Ngiy thu qui
d p t l 69 68 68 68 77 77 76 76 70
td hgpN .. (ngiy) Ngiy ket thiic thu
hoach 94 94 93 93 105 105 106 106 95
PK Thdi gian
sinh trudng
136 136 135 135 147 147 148 148 137 Ket qua bang 1 cho thiy, thai gian tir trdng den ra he gida cac cong thirc co sy khac nhau, nhung
khong ding ke, chi chenh lech 1-4 ngay. Cong thuc 7 vi 8 ra hoa sdm hon cic cong thiic cdn lai tir 1-4 ngiy, do hai cong thirc nay dugc cung cip lugng phan lan nhidu hon so vdi cae cong thuc khic.
Phan lan khi bdn diy dit co tic dung lim cay nd hoa sdm vi lan tang cudng hoat ddng cua xitokinin.
Thdi gian tir trdng den dau qui ciia gidng TN129 khong hi inh hudng bdi cic td hgp phan bdn khic nhau nhung cd inh hudng rd hon tdi thdi gian bit diu thu qua. Qua bing 1 cho thiy, ci 3 cong thiic 2, 3, 4 deu cd thdi gian thu qui dgt 1 sdm nhit, sdm hon 8-9 ngiy so vdi cong thiic 5, 6, 7, 8 va 2 ngay so vdi cong thirc ddi chung. Chung td d nhung cong thue cd lugng dam nhieu hon da lam chain qua trinh chin cua qui hon. Didu dd cd anh hudng tdi thdi gian ket thuc thu hoach, do vay khi bdn phan theo cac cong thirc tir 1-4 vi ddi chung thi thu hoach tap trung khoang 25 - 26 ngay, rieng cac cong thue 5, 6, 7, 8 cd lugng dam cao hon thi thdi gian thu hoach keo dii hon tir 3-5 ngiy. Ket qui nay cd lien quan den tdng thdi gian sinh trudng (TGST) cua gidng. Do thi nghiem dugc tien hinh tren ciing mot gidng, nen thdi gian tir gieo den trdng la gidng nhau (42 ngiy).
Vi vay, cdng thirc nao ed ngiy ket thuc thu hoach sdm hon thi cd TGST ngin hon vi ngupc lai. Cu the li: Cong thiic 3 vi 4 cd TGST ngin nhit, tiep den li cong thiic 1, 2 vi ddi chimg, TGST dii nhat li cong thue 5, 6, 7, 8 (147-148 ngiy).
2. Anh hudng cua cac td hgp phan bdn den tinh hinh benh hai cua gidng TN129 trong vu XH 2006 va DX 2006-2007 tai Thai Nguyen
Bang 2. Anh hudng cua cac td hgp phan bdn den tinh hinh benh hai ddi vdi gidng ca chua TN129 trong vu
TF 1 2 3 4 5 6 7 8 9(d/c)
X.
To hep NKC 9ft80:120 9a80:150 9ai00:120 90:100:150 12ft80:120 12a80:150 12ai0ftl20 12ftl0ftl50 9a60:120
H 2006 va DX 2006-2007 Benh xoan la
TLB (%) XH2006
25,0 11,1 12,5 13,2 14,2 6,8 0,0 6,7 20,1
DX2006- 20O7 20,7 18,3 15,5 13,2 13,9 10,8 7,8 7,3 26,7
Benh heo rii TLB (%) XH2006
5,6 3.1 4,3 7,1 0,0 3,2 6,6 6,6 7,9
DX2006- 20O7
6,6 4,8 7,2 6,5 7,8 6,5 6,9 5,1 9,2
Ket qui bing 2 cho thiy, benh xoan li vi benh heo ru xuit hien vi gay hai trong ca vu XH 2006 vi vu DX 2006-2007, tuy nhien ty le benh khong cao;
trong dd ca 2 benh niy d vu DX xuit hien phd bien hon so vdi vu XH. Ty le benh xoan li trong vu XH dao dpng tu 6,7 - 25%, trong khi a vu DX tir 7,3 - 26,7%; trong dd nang nhat li cong thirc ddi chung vi cong thue 1. Dac biet ty le benh cita ci chua TN 129 d mirc phan bdn nhu cong thiic 6, 7 vi 8 deu thip hon so vdi cac cong thuc con lai. Benh heo ru cd chidu hudng nhe hon so vdi benh xoan la, ty le benh bidn dpng tu 3,1 - 7,9% vu XH 2006 vi tir 4,8 - 9,2% vu DX
Bang 3. Anh hudng ciia cic td hgp phan bdn den ca chua TN129 trong vu
2006-2007, trong do ty le benh cao nhit vin d cong thuc ddi chimg tir 7,9 - 9,2%.
3. Anh hudng cua cac to hgp phan bdn den mgt sd chi tieu nang suit ciia gidng TN129 trong vu XH 2006 va DX 2006-2007 tai TTiai Nguyen
Sd lieu bing 3 cho thiy, cac td hgp phan bdn khic nhau cd anh hudng den sd qua tren cay cita gidng ca chua TN129 trong ci 2 vu thi nghiem. Vu XI-I 2006, gidng ci chua TN129 cd sd qui TB/cay dao dgng til' 10,1-14,3 qui/cay, trong do d tit ca cic td hgp phan bon tir 1-8 ddu cd sd qui tren cay tuong duong nhau va cao hon cdng thue ddi chung chic chin d do tin cay 95%.
cic yeu td cau thinh nang suit va nang suit ciia gidng XH 2006 vi DX 2006-2007
TT 1 2 3 4 5 6 7 8 9(d/c)
T^hgpNP-K 9a80:120 9ft80:150 9aioai20 90:10ai50 12a8ftl20 I2a8ai50 i2aioai20 i2aioai50 9a60:120 CV(^
LSDoj
SdquaTB/cay
(quj^
XH 11,9'' 12,2*' 123'' 12,5"
13,4"
142' 133"
14,3- 10,1' 11,25
2.47
DX 11,4'' 12,(?^
12,0^
12,0^
13,0'^
142' 13,5"
14,1' 10,8' 9,33 2,02
KLTB/qui (g)
XH m,8"
86,7'' 85,8'' 86,5"
90,1'' 95,0"
90,2'' 98,6"
81,9' 10,32 15,87
DX 100,6'' 108,0'' 101,5'' 1052'' 108,7'' 108,9'' 107,0' 1083' '^^^
7,83 8,66
NSTT (tan/ha) XH
30,1'^
31,61' 31,0' 31,91' 33,7'' 343*' 35,1"
38,5' 24,4'- 10,50
5,86
DX 33,0^
34,1*
333^' 34,6^
373'' 41,0'^
42,5' 46,6^
29,9 6^
4,01 Cong thirc ddi chung chi bon NPK voi ty le
90:60:120 kg/ha co sd qui thip nhat (10,1 qui/cay), bdn them 20 kg PoOs/ha nhu cdng thue 1 sd qui tang len dat 11,9 qui/cay. Klii tang them 20 kg P205/ha va 30 kg K20/ha nhu cong thuc 4 thi sd qui tang len vi dat 12,5 qui/cay. Tuy nhien, trong 8 td hgp phan bdn tren thi cac td hgp tu 1 den 4 vdi lugng bdn 90 kg N/ha cd xu hudng thip hon 4 td hgp cd lugng bon 120 kg N/ha.
Vdi vu DX 2006-2007, gidng TN129 dugc bdn phan nhu cong thitc 6 vi 8 cung cd sd qui cao nhit (tir 13-14,2 qui/cay), cao hon cong thue 1, 2, 3, 4 va ddi chimg chic chan d do tin cay 95%. Cic cong thuc cdn lai sai khac nhau khong cd y nghia thdng ke.
Klidi lupng trung binh tren qui cita ci chua TN129 dupe bon lupng phan bdn khic nhau trong ci 2 vu co su khac nhau kha ro, tu cdng thtrc 1 den cong thue 8 ddu cao hon cdng thirc ddi chimg chic chin d dd tin
cay 95%. Cdng thuc ddi chung do dupe bdn vdi lieu lupng thip, nen chua dim bio dinh duong cho cay sinh trudng, phit trien vi tao qui, vi vay ci sd qua TB/cay vi KLTB/qui deu dat thip nhit. Dd chinh la nguyen nhan lim giim nang suit ca chua.
Bdn du va can ddi cac loai phan khoang da lam tang nang suit ci chua thi nghiem. Sd lieu bing 3 cho thiy, mac du trong dieu kien trii vu nhung nang suit dat kha cao, dac biet nang suit dugc tang din theo heu lupng phan bdn tang. Cu the bdn vdi lidu lupng NPK nhu cong thue 8 (120:100:150 kg) cho nang suit khi cao (38,5 tin/ha vu XH 2006 va 46,6 tin/ha vu DX 2006-2007), cao hon cac cdng thue tu 1 den 4 va ddi chiing chic chin d do tin cay 95%. Trong vu XH 2006, cac cdng thuc 5, 6 va 7 mac du cd NSTT sai khac khdng cd y nghia thdng ke so vdi cdng thirc 8 nhung cd xu hudng thip hon.
24 NONG NGHIEP VA PHAT TRIEN NONG THON - KY 1 - THANG 1/2011
KHOA HOC CONG NGHE
i g 4 . Hieu qua Cong thue
Vd 90:8ai20 90:8ai50 90:10ai20 90:10ai50 I2a8ai20 12ft8ftl50 120:100:120 120:100:150 90:6ftl20
d n h te sir dung phan bdn ciia gidng ca chua Tdn
(trieu c XH 90,3 94,8 93,0 95,7 101,1 102,9 105,3 115,5 73.2
g thu dng /ha)
DX 82,5 85,3 83,3 86,5 93,3 102,5 106,3 116,5 74,8
TN 129 trong vu Tdng chi
(trieu ddng /ha) XH
44,8 45,1 45,1 45,3 45,1 45,3 45,4 45,6 38,3
DX 54,0 54,2 54,3 54,6 54,3 54,6 54,6 54,9 47,6
XH 2006 va E X 2006-2007 Lai
(trieu ddng /ha) XH
45,5 49,8 47,9 50,4 56,0 57,6 60,0 70,0 34,9
DX 28,5 31,0 29,0 31,9 39,0 47,9 51,6 61,6 27,1 Ghi chu: - Gia ban ai chua vu ddng xuan TB: 2500
phan bdn vii ddng xuan 200(>2007 (d/kg): dam ure = chuong = 600 d. Gia phan bdn vu xuan hi 2006 (d/kg):
d;phan chudng = 600 d, vdi bpt = 200 d.
Ket qua bing 4 cho thiy, nhin chung, trdng ca chua trai vu thudng cho lai thuan cao vi dugc gia ban, dao dpng tir 34,9-70 trieu d/ha, cdn vu DX 2006-2007 chi dat tir 27,1 - 61,6 trieu d/ha. Tuy nhien, lai thuin CO sy chenh lech k h i rd giua cac mue phan bdn khac nhau, ti'ong dd gidng c i chua TN129 dupe bdn phan iihu cdng thue 8 cho lai thuan cao nhit (tir 61,6-70,8 trieu d/ha).
Nhu vay, bdn phan vdi lugng 25 tin phan chudng hoai muc + 800 kg vdi bdt -t- 120 kg N -i- 100 kg PvOr, + 150 kg KaO/ha cho gidng c i chua TN129 dem lai nang suit v i hieu q u i kinh te cao nhit.
4. Anh hudng cita cac td hgp phan bdn den cac chi tieu ve chit lugng qua cua gidng ca chua TN129
Tiianh phin dinh dudng cita c i chua khdng dn dinh va thay ddi theo dac diem cua gidng, bien phap KT thuat canh tie, dieu kien ngoai cinh, thdi ky thu hoach, phuong phap cung nhu thdi gian bao quin. De danh gii inh hudng cita cic td hgp phin bdn den chit lupng qui da tien hinh phan tich nipt sd chi tieu chit lupng qui vi ham lugng NO^' tdn du trong qua. Do didu kien ban che nen chi phan tich mdt sd h i m lupng chmh trong qua cua gidng TN129; ket q u i dupe trinh bay d bang 5.
Theo ket qua phan tich d bang 5 thi, ham lupng chat khd h o i tan bien dpng tir 3,82-4,48 dd Brix, Irong do cdng time 4 cd h i m lupng cao nhit va thap nhit li cdng thuv ddi chiing. Ham lupng dudng tdng sd cua gidng TN129 d cac td hgp phan bon kliac nhai' (> Sd ^^^ "^^dng nhd tu 2,01-2,45%, trong do d
d/kg. Gia ban ca chua vu xuan he TB: 3000 d/kg. Gia 5000 d, supe lan = 2700 d; kah clonia 5500 d; phan dam lire = 4600 d, supe lan = 2700 d; kah clonia= 4200
cdng thue 4 dat cao nhit (2,45%), cic cdng thue cdn lai cd sy bidn dgng khdng ldn tu 2,01-2,39%. Dieu dd cho thiy, cac td hgp phan bdn khac nhau khdng lam anh hudng den h i m lugng dudng trong q u i ca chua.
Bang 5. Mgt sd chi tieu chit lugng qua c i chua TN 129 b cic td hgp phan bdn khac nhau trong vu XH
2006 CT
1 2 3 4 5 6 7 8 9 d/c
To hgp N:P:K 90:80:120 90:80:150 90:100:120 90:100:150 120:80:120 120:80:150 120:100:120 120:100:150 90:60:120
Do Brix
(%) 4,18 4,24 3,87 4,48 4,00 3,92 4,33 4,09 3,82
Du'O'ng (%) 2,15 2,27 2,12 2,45 2,04 2,20 2,39 2,14 2,01
Do axit (%) 0,29 0,40 0,26 0,51 0,29 0,37 0,49 0,44 0,37
VTMC (mg/lOOg)
34,36 35,64 38,15 36,03 32,12 44,51 42,39 46,59 33,91
NO.,- Ong/
1kg) 62 68 73 70 74 62 71 65 94 Ham lugng axit tdng sd eua ca chua d cdng thue 4 cao nhit (0,51%), cao hon so vdi ddi chiing 0,14%. Cic cdng thuc 1, 3 vi 5 cd ham lugng axit tdng sd thip hon so vdi cdng thue ddi chung. Ham lupng vitamin C (VTM C) trong qua cao lim tang gia tri dinh dudng cua qua ddi vdi sy sinh tiirdng, phit trien cua co the con ngudi. Ket qui phan tich ham lupng VTM C chi ra ring: cic cdng thuc kliac nhau cd ham lupng VIM C Idiic nhau, bien dong hr 32,12 nig/100 g - 46„59 mg/100 g. Tni' cdng thue 5 cd ham lupng vitamin C thip hon ddi chung cdn lai tit c i cac cdng thiic deu cao hon so vdi ddi chung tu 0,45-12,(38 nig/lOOg, trong dd
cao nhat la cdng thirc 8 (46,59mg/100g). Nhu vay, cac td hpp phan bdn da cd inh hudng tich cyc, lim tang chat lupng qui ca chua so vdi cdng thue ddi chimg.
Theo Quyet dinh 99 ve tieu chuan c i chua an toan cua Viet Nam (TCVN 5247: 1990) thi ham lupng NO3" cho phep trong q u i l i nhd hon hoac b i n g 150 mg/kg sin phim tuoi [5]. Nhu vay, sd heu b i n g 5 cho thiy, h i m lugng NO3 trong q u i ca chua a cic td hgp phan bdn khic nhau ddu r i t nhd, dao ddng tir 62- 94 m g / 1 kg sin phim tuoi, h i m lugng niy tiiip hon ngudng cho phep tdi da vd sin phim c i chua an toin.
Vi vay, vdi lupng dam bdn cao nhit thi nghiem la 120 kg N/ha vin khdng de lai tdn du NO3 vupt q u i tieu chuin cho phep.
Nhu vay, qua cac ket q u i nghien cuu tren cho thiy, cd the ap dung td hgp phan bdn nhu cdng thue 8 (120 kg N -r 100 kg P2O5 -H 150 kg Kfi) vira cho nang suit v i hieu qua kinh td cao, viia d i m bao an toin thyc pham.
IV.KETLUAI\IVADEI\IGH|
1. Ket luan
- Td hgp phan bdn vdi lugng dam cao hon (120 kg N/ha) nhu cic cdng thuc tir 5-8 keo dai thdi gian sinh trudng cua TN129 so vdi cac cdng thiic cdn lai (90 kg N/ha) tir 9-13 ngay.
- Nang suit thyc thu cao n h i t l i cdng thuc 8 (nen + 120 kg N -H 100 kg PoOj -r 150 kg K2O) trong ca 2 vu dat hi 38,5-46,6 t i n / h a , cao hon cac cdng thirc cdn lai a mue tin cay 95%.
- Hieu q u i kinh te dat cao nhit l i cdng thirc 8 (nen + 120 kg N -^ 100 kg P2O5 + 150 kg K2O) vdi lai thuan tir 61,6-70,0 trieu d/ha.
RESEACH ON DETERMINING THE SUITABLE COMBINATIONAL FERTILIZER FOR A NEW TOMATO VARIETY TN129 IN THE SUMMER - SPRING SEASON 2006 AND SPRING -
WINTER SEASON OF 2006-2007 AT THAI NGUYEN CITY
Nguyen TTii Mao, Nguyen TTiuy Ha, Nguyen Viet Hung Summary
A new variety of tomato TN129 "was gro'wed at Thai Nguyen city to identify suitable fertilizer for higher productivity. All most of the 9 different combinational fertilizers •were affected on gro'wing time, yield and quality of variety TN129. Of these, the treatments 5 to 8 (which applied 120 kg N/ha) have growing time longer than the treatments 1 to 4 (applied 90 kg N/ha) about 9-13 days. The treatment 8 (used a foundation + 120 kg N -I- 100 kg P2O5 -I- 150 kg Kfl) gives the highest yield compare with the control and the other remains treatment in both two seasons which 38.5-46.6 tons/ha. This treatment also gave a highest income which about 61.6 to 70.0 million VND per ha. To apply fertilizer for variety TN129 as these treatments still gave a good quality and safety. So that, base on this trial as the combination! fertilizer as treatment 8 (25 tone organic fertilizer + 800 kg lime stone -F 120 kg N -^ 100 kg P2O5 -^ 150 kg KgO to apply for variety TN129 was suitable in both two seasons in Thai Nguyen city area.
Keyword: Tomato, spring- winter, summer - spring, ThaiNguyen.
Ngirdi phai bien: TS. Biii Huy Hi^n
- Cic td hgp phan bdn deu cd anh hudng tich cyc ddn chit lugng q u i va khdng de lai du lugng NO3- trong qua vugt qua gidi han cho phep.
2. De nghi
Cd the gidi thieu td hgp phan bdn cho gidng TN129 cho s i n xuit tai Thai Nguyen.
TAI UEU THAIVI KHAO
1. Bg NN&PTNT (2006). Qui pham khao nghiem gia tri canh tac va gia tri sir dung ciia gidng ca chua. Quy phan] khao nghiem gidng cay trong, tr. 1-9.
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