Ảnh hưởng của phân bón chứa ca và mg đến sinh lý quang hợp và năng suất cây hồ tiêu (pipper nigrum l ) đang trong giai đoạn kinh doanh tại đắk lắk

KHOA

Hoc CONG HONE

ANH HUONG CUA PHAN BON CHIA Ca VA Mg HEN
SINN Lt (WANG HOP VA NANG SUAT CAY HO Tau
(Pipper nigrum L.) HANG THONG GIAI DOAN
KINH DOANH TAI OAK LAK
Nguyen Tien Nam', Tran Manh Th12,
Trail Thing DOng2, Nguyen Anh Dung'
TOM TAT
Thi nghtem dugs ben hanh tau xa Ea "lieu, huyen Cu Kuin, tinh Dak ISE to thing 4 nani 2015 den thing 3
nam 2016 nham &WI gia anh htning ciia bon Ca va Mg den dee diem quang hop va clang suit cay h6 btu
(bYper tgqrum L) glai down kinh doanh. KCt qua cho thay sit dung Ca va Mg da cal thien kha nang quang
hop cua cay; ham luong dinh duOng da luong, trung Wong trong Li can ddi !m, nang suit cay hit lieu clang
kinh doanh tang 6,68% so veri ddi cluing (along *Mg 3,67 ta/ha).
kb& Galina canal MgSO, hit deu 'ripper am, quang

trishr
Viet Nam la nu& sin xuat va xuat khan he tieu
hang du the giot Theo sd lieu thong ke nam 2015,
dien tich he tieu cua Viet Nam khoAng 85.000 ha,
xuAt khan 133.569 tan chiem 45,5% thi trutong he tieu
the giOi. Trong de, 50,5% dien tich va san *mg h6
tieu dm Viet Nam tip trung b cac tinh Thy Nguyen.
Cay h6 tieu clang la cay trong dein lai hieu qui kinh to
cho (thug clan Thy Nguyen.
Hien nay nghien aiu ve dinh clueing trong lugltg
Mu: canxi (Ca), magie (Mg) va Itm hujmh (S) cho
cay he tieu a Viet Nam con it dupe quan tam
(Nguyen Hoy Trinh, 1988; Ton NO Twin Nam, 2004).

Trong !chi de, theo Mathrew (1994), Pariah (2009)
va Sadananda (2000) nghien ails thong dinh clueing
cho cay h6 tieu thay Ca tich luy trong la kha cao,
thich hop la 1,42 — 3,33%, ttrong duong voi K va N.
cao gap 10 Ian P. Tuong tv nhu Sy Mg ce nhu ciu
gap 2 lin so vei P, ham Itrong S trong la thich hop
0.09 — 0,29, tuang throng vol P. Thuc to san xuAt h6
tieu 6 Thy Nguyen cho thay. nue' san xuat he tieu
sir dieing phAn ben chua can d6i, chic yeu ben N, P va
K, vi vay, hien tuong thieu sinh 1S, Ca, Mg va S tren
la da bleu hien kha ph6 hien 6 cay h6 lieu kinh
doanh vao diu mica mm &Tay Nguyen.
De Op phin clang cao hieu qui san xuat ray h6
tieti, thi righiem thvc hien phun dung djch Caltrac
va MgSO4 cho h6 tieu kinh doanh, vv 2015-2016 tai
I NCS khoa hoc city trOng, Truemg DO hoc Tay Nguyen
Vien Ong nghe Sinh hoc & MT, Truhng Dal hoc Tay
Nguyen

26

huyen Cu Kuin, tinh Daly Uk nhint nghien clnt )(sic
dinh val tre sinh IV, 'wing ben t61 w ala Ca, Mg del
veil cay h6 lieu.
L 110111)1 VA PHUONG
C1111
2.1. Vet lieu, thei gime dla diem nghien eta
- CAy he tieu (Ether n(grum
giai don kinh
doanh, gidng Vinh Linh (Viten cay dang thtri kir kinh

doanh Min dui 6, nang &lift: 542 ta/ha née thi
righiem...), ming teen Qat nau do (Rhodic
Ferralsols). Mat dO 1.600 trv/ha, Ichoing cach cay
each cay va hang each hang: 2,5 x 2,5 m.
Phan ben la Caltrac co ham luong Ca la 40% w/w
(Cty iNHH Yara Vitt Nam), MgSO4.7 H2O 98% c6
8,5% Mg va 11,5%5 (Ttung Qudc).
- Mei gian nghien den thi nghiem: tir thing
4/2015 den thang 3/2016.
- Dia diem nghien (-du: thi nghiem dam b6 tri vi
dim hien tai khu Arc xa Ea lieu huyen Cu Kuin, tinh
DAlc
2.2. Pinang phap b6 tri thi nghlem
- Ceng thtic thi h
CoM
1.
d( M0e
a
C2M0
)
Cal1/441
2.
10.
C2M1
3.
11.
COM:
C2M2
4.
COM,

12.
C2M3
5.
CiMa
13.
C3M0
6.
CIA
14.
C3M,
7.
CIM2
15.
C3M2
8.
C M3
16.
C3M3

NONG NGHIEP VA PHAT TRIEN NONG THON - KY 2 - THANG 8/2016


10110A HOC CONO MOH.
+ Cat phin tich Wing quang ph6 hip phi
Trong de:
nguytn tit MS (A7000, Shimazu, Nhat Bin), AOAC
Co: Phun nuoc Ia, Mo: Phun nu& Ia, Cr: Caltrac
0,10%, hit: MgSO4 0,10%, C2: Caltrac 0,15%, M2: 969.08 (2005), MS.
+ Mg%: phis] tich bang quang ph6 hip phu
MRS04 0,15%, C3: Caltrac 0,20%, M3: MgSO4 0,20%.

nguyen
tit MS (A7000, Shimazu, Nhat Ban), AOAC
Thi nghiem dupe b6 tri theo khat hart town
ngAu nhien (Randomized Complete Block Design — 969.08 (2005), MS.
- Cac chi lieu phan tich dit
RCBD). ban Lin nhic lai gam 16 Ong thitc, 64 0 thi
nghiem. 12 try he tieu/O. tong dien tich toan thi
+ pHKo: Do bang pH met;
nghiem la 0.48 ha.
+ Man (%): Bang phuong phap quang ph6
Caltrac va MgSO4 phun 3 lin/vu: Lain 1 truer ra Walkley-Black:
hoa vao diu mita mita, lin 2 sau dau trai (thing 8),
+ N %: Xac djnh bang phuong phap Kjeklahl:
lin 3 thin k5 nub' qua (than 10). Caltrac va MgSO4
+ P205 96: phuong phap quang phd theo 10 TCN
dupe hoa trong nuac, mai lin phun 1.500 lit dung
306.97.
(Lich /ha, phun dem len be la cay he tieu vao trued
chieu mat.
3the djnh bang phuong
+ P205 (mg/100 g
phip
quang
phd
theo
TCVN
52562009.
- Nen thi nghiem: bon 360 kg N + 180 kg P2O5 +
360 kg 1(20/ha (theo Quy trinh ky thuat treng. chain
+ Kali %: Lilian tich bang quang ph6 hip phu

soc va thu hoach h6 lieu do BO Nang nghiep vi nguyen tit MS (A7000, Shimazu, Nh$t Bin), TCVN
PINT ban hanh theo Quyet djnh s6 730/QD-BNN- 8562:2010, MS.
5/3/2015).
TT
+ Kali (mg/100 g): plain tich bang quang ph6
2.3. Phuong phitp theo del cat chi tieu
hip phi) nguyen tit MS (A7000. Shimazu, Nhat Ban),
- Citc chi tieu theo del ye sinh h quang hop: theo TCVN 8662: 2011, MS.
du& do tai vu ern thi nghiem, that gian do tit 8 gib 30
me- 081/100 g): Xac djnh bang phuong
+
(len 11 06 30 bang may do quang hop chuyen dung phap quang phd hip phu nguyen tir AAS (A7000,
IPS - 2 dm Hoa Ky.
Shimazu, Nigh 13in) theo TCVN 64962009 AAS.
+ Cuong det quang hop (CDQH) (Innolin12/0.
+ Ca'', Me (1d1/100 g): Xac djnh bang phuong
phap
quang phd hip phi) nguyen tit MS (A7000.
+ Cuang dO align hot nu& (CHINN)
Shimazu, Nhat Bin) theo TCVN 85692010, MS.
rnmol/m2/s).
Lay !du dit lay trutc khi thi nghiem 6 ling 0 —
+ DO met khi kh6ng (DMKH) (mmol/m2/s).
30 cm bang khoan neng h6a chuyen dung et vj tri tan
- Nang do CO? trong gian bao caa la (NDCO2)
cay h6 tieu. !Ay tai 5 diem chto gOc tree wan.
(amol/m2/s).
2.4. Phtrang phap xi/ if 96 btu
- Cac chi tieu phan tich mOt s6 chit trong It
Cac se lieu duoc tang hop va %ink thong ke

Ily 30 la banh to ngoai bin theo
Lay mit
bang ehining trinh SAS 9.1.
hating Deng, Thy, Nam, Bic b dO cao 1/3 try tit dual
3. Ai QUA VA MO LUAN
mat dit len sau dot phun dung djch Ca, Mg cu6i
fling 20 ngay. 6 4 cay h6 tieu/to thi nghiem. La du&
3.1. MCA s6 chi tieu hoa tinh dit khu vyc thi
rira sach. de rao, say va nghien, phin tich theo cat
phttong phip sau:
Ket qua phan tich mOt s6 chi lieu has tinh dit
+ N96: phan tich theo 10 TCN 451:2001.
truce khi b6 tri thi nghiem duos trinh bay tai bing 1.
+ P%: ph& tich theo 10 TCN 453:2001.
ono° cua dit vuen thi nghiem trung binh dat
4,6,
Diu& loci dit chua. Ham luting man tang sec
phan tich bang quang ph6 hip phu nguyen
+
lir MS (A7000, Shimazu, Nhat Bin), AOAC 969.23 trung binh la 4,37%, dam tdng s6 0,21% vi Ian tong s6
0,19% 6 mar khi giau, tuy nhith K2O tong s6 la
(2005). AAS.
0.04% dupe danh gia b mire ngheo.

a

NONG NGHIEP VA PHAT TRIEN NONG NON - KS' 2 - THANG 8 /20 16

27

KHOA HOC CONG NGHO

P205 de tieu dot 11,12 mg/100 g dat va K30 de
lieu dot 17,25 mg/100 g dat duqc &nit gin er mtic
thgp.

Cat va Mg" trao ddi trong dat dirge danh gig
mtic ngheo.

-- --. --=•••••••‘•••• nws• "" 15 -on

Tong sd
Miu s6 pHica
(%)
OM
N
P205
1
4,90
3,91
0,23
0,26
2
4,90
5,11
0,21
0,25
3
4,13

4,81
0,25
0,19
4
4,16
3,85
0,21
0,12
5
4,90
4,16
0,16
0,13
TB
4,60
4,37
0,21
0,19
3.2. Mit htreng cua phan bon la Caltrac va
MgSO4 den hgp thu dinh duong khoang trong IA hd
tieu

Kat qua sir dung Caltrac va MgSO4 phun cho cay
he lieu da anh hueng den ham lacing dinh doting
khoang trong la 116 lieu (bang 2) cho thgy:
Ham luting N% ctia core ding thirc dao Ong to
2,31% den 2,73%; cao nhgt a tong thtic c3M2, tang
0,12% so vol deli chimg; ham luting N% thich hop cho
cay ho tieu sixth trueng va phat trien theo thang dinh
dating chugn ctia Sadananda (2000) vi Partelli

(2009).
Ham lasing P205% et ale Ong thirc bien thien
0,11- 0,14%; P205% trung binh cua c.4c ding fluke co
phun Caltrac va MgSO4 chi dot 0,13%, dot ngueng
thich hop et mac thap so vitt ding 1)6 tea Sadananda
(1994, 2000).
K20 trong in b core cOng thirc dao dung tir 1,23%
den 2,05%, trung binh la 1,61%. Cac cOng thirc phun
C3Mi, C3M2 co him lacing K30% trong la tang 1,872,05916, cao horn so veri trung birth K20 % trong la va
cao hon so vOi deli chimg COMO la 1,51%. Ka% trong
la a cOng that C3M, va C3M2 norm trong nprong kali
thich hop cho cay h6
Khi khOng phun Caltrac (CO) ham luting Ca
trong la 0,94,23%, so sanh vol thang dinh clueing ciia
Sadananda (2000) va Nguyen Huu Trinh (1988) cho
thgy wren cay thieu Ca. Khi sir dung core nong dO tir
C, den C3 ham hong Ca trong la vao then ltY cudi vu
co xu huong dupe cal thien. Trong 86, sir dung mtic
tir C2 den C3 cho ham luting Ca trong la dao dOng tir
1,43% den 2,12%, day la nguung &roc danh gig la
thich hop voi h6 tieu. Ket qui cling cho thgy phun b6
28

De lieu
Cation trao ddi
ang/10010
(1d1/100g)
1(20
13205
IC20

Cap'
Me
0,12
15,43
15,32
0,89
0,70
0,03
16,74
10,74
0,33
0.46
0,03
11,15
15,42
0,43
0,41
0,02
6,83
21,94
0,37
0,40
0,02
5,45
22,82
0,84
0,42
0,04
11,12
17,25

0,57
0,48
sung canxi qua la hieu qui hon so v6i bon canxi qua
dgt theo nghien eau cita Thalib va cOng sty (1991).
Bang 2. Anh hieing dm noting di) Caltrac va MgSO4
den tich lay dinh dtrong khoana trong
COng N
P K Ca Mg
IT
dilly (4%) (%) (%) 00 00
1 CoMo 2,44 0,12 1,51 1,04 0,16
(d/c)

2
3
4
5

C0M,

2,53 0,14 1,43 0,96 0,23
CoM2 2,43 0,11 1,54 1,23 0,21
CoM3 2,41 0,12 1,37 1,14 0,46
C1M0 2,31 0,13 1,63 1,11 0,14

8

C1M1 2,43 0,13 1,73 1,09 0,32
CiM2 2,41 0,12 1,48 1,21 0,41
C1M3 2,65 0,11 1,63 1,23 0,51

9

C2M0 2,32 0,14 1,32 1,43 0,21

6
7

10 C2M1 2,35 0,14 1,75 1.47 0,38
11 C2M2 2,43 0,11 1,23 1,76 0,39
12 C2M3 2,51 0,14 1,63 1,44 0,49
13 C3M0 2,72 0,12 1,92 1.57 0,13
14 CaMi

2,61 0,14 2,05 2,12 0,33

15 C3M2 2,73 0,11 1,87 1,98 0,51
16 C3M3 2,51 0,12 1,63 1,56 0,54
Ham using Mg (90: Cic mix phun MO cho ket
qua ham lacing Mg (%) dao dOng lir 0,13% den 0,21%
va er mac thieu but so voi thang chugn cita Phan Hatt
Trinh (1988), Sadananda (2000) va Partelli (2009).
core mac phun MgSO4 to MI den M., ham luting Mg

NONG NGHICP VA PHAT TRIEN NONG TH6N - Ki' 2 - THANG 8/2016


KHOA HOC CONICS NONE

(%) trong Li cao, dao dOng tir 0,21 den 0,54%. Nhu vay

phun bd sung MgS0, da car thien ham luting Mg
tong sd trong la. SO dung mirc phun M3 cho ket qua
tot nhit vol him lung Mg (%) tir 0.46% den 0,54%,
dat mtic thich hop de city lid tieu sinh tnning vi cho
nang suit bit. Nhu v$y, hen nen phAn bon 360 kg N +
180 kg P205 + 360 kg K20/ha neu phun b6 sung Ca
va MgSO4 thi dinh dtrOng trong la dm cay h6 tieu cAn
ddi hon.

C.6ng thikc
CoMo (4/c)

33. Anh htrOng ctia ming dO caltrac va MgSO4
tbl sinh ly quang hop
De dinh gia anh huong dm Ca va MgSO4 tot
sinh ly quang hop cua cay lieu, da lien Minh theo dot
tic chi teen ben quan den ctrang do quang hop
(CDQH), cutting do thoat hot nuoc (MIEN), dO mo
khi kitting (DMKH) va ming dO CO2 trong gian bit°
(NDCO2) (-Oa la lieu trong cac cOng thtic phun ket
hop Caltrac va MgSO4 vet cac nting do) khac nhau
bang 3.

ndng dO Caltrac va M2SO. den mot so) chi tieu ye quang h
Non dO CO2
DO mit IOC
Catlin dOTHN
Cueing dO QH
(Itmol/m3/10
(m11101/e/s)

(olloo1/1111/4)
(1mol/m2/10
273,25'
126,35 d
1,26
8,89

Cal

8,94

1,,82

208,45 '"`'

337,50 b

C3M2

9,01

1,88

218,18'

310,25**

CoM3

9,03

1,79

194,65 •••4

322,50 "

CtMo
C1M1

9.02

1,75

204,05'"`

305,50 be.

9,78

1,57

227.78'

305,75 led•

CIM2
CIM3

9,43

1,89

213,65*

305,50'"'

10,30

1,88

209,90'`

333,00*

C2M0
C2M I

9,87

1,91

222,78'

318,00 bate

10,15

1,83

252,78 •

318.25 belie

C2M2

8,89

1.70

134,28*

C2M3

12,11

1.78

259,78 •

281,75*
moo It

C3M0

9,87

1,74

258,38'

299,25 bcd*

C31sA1
C3M:

9,81

1,91

139,48 "

287,50 'de

1220

1,77

268,03 •

393,25 •

CsM3

9,71

2,01

222,33 •

305,50 bird"

LSD cos C

NS

NS

NS

NS

LSD mos M

NS

NS

NS

NS

LSD OA C*M

NS

NS

75,78

48,89

CV(%) CIA

24,88

34,65

25,33

10,90

Cric chit Si khic nhau tong 01 bieu sg sai kink a nghia thew ke ref pc0,05,
Sai
Glzi
khae khOng co nghia
Ka qui t4 bang 3 cho thiy cuong dt) quang hop tac giCza Ca va Mg la khOng coy nghia thong ke o dO
caa h6 lieu Men thien 8,9-1220 prnol/m2/s. C.& cOng tin cay 95%. MSc du v(ty, o cite cling thtic C3M2 va
thtic cO phun the pharn Caltrac vA MgSO4 ddu lim C2M3, n6ng dO xir lyt 0,150,20% Caltrac va 0,15-020%
tang ctrang d0 quang hop tir 0,56% (COMO den 37,22% MgSO4 cho gig tri CDQH cao nhat 12,11-12.20
(C3M) so voi ddi chimg phun nuoc IA (CoM„,). Tuy pmoVm2/s so vet ddi cluing Li 8.89 prnol/m2/s. Ket
nhien, sty khic biet giera cac cOng thtic phun vA tuong qui cong cho thiy 0 clang nguUng Caltrac, sty gia

NONG NGHIP VA PHAT TRIIN NONG THON - Kt 2 - THANG 8/2016

29


al

IOWA HOC CONG NONE
tang ming do MRS°, da lam tang cueing do quang
hqp trong la h6 tieu.

Anh hiking cua phun Caltrac va MgSO, den
nang suit cay h6 tieu trong thi nghiem dupe the
Cueing dO thou hot nuoc vi neng dO CO2 trong hien tat bang 4 elm thay: khi phun Caltrac ding dO
gian bao: CDTHN Ira n6ng dO CO2 trong gian bao ctia 0,20% nang suit dat 57,65 ta/ha, tang 2,38 ta/ha so
cay trong nOi chung va thy h6 Lieu not rieng phy vii dal chting khong phun; phun MgS0, neng dO
thuOc rat nhieu vao giOng, dien tich lit, cueing de inh 0,20% cho nang suit dat 56,99 ti/ha, tang 0,74 ta/ha
sang khi tien hanh do vi the dO dinh dtrOng. Thi so veil doi chimg khOng phun. Sir dung kat hum Ca vi
nghiem ben hanh do CDTHN vi ding do CO2 trong Mg cho thiy nang suit h6 tieu thi nghiem hien dOng
gian bao ala la ho fiat giai doan kinh doanh ala cic 55.27 - 58,57 13/11a. rieng 6 cong thtic C3M2 ming
cling thtic vi kat qui cho thiy: CDTHN ala clic cong suit tang 6,68% (tuong throng 3,67 ta/ha) so vol doi
thtic phun Caltrac va MgS0, via the n6ng dO khk chimg.
nhau dao dung tit 1,26 mmol/e/s (COW den 2,01
4.1th Lill
mmol/m2/s (C3M3) vi neng dO CO2 trong gian ban
But din sir dung Caltrac vi MgS0, da lain tang
thap nhat dat 273 pmol/m2/s Ong thtic doi chting
ham lung Ca, Mg trong la h6 UN, tang hip thu dinh
(CAC vi cao nhit dat 393 urnol/m2 /s tai cling thtic
darting khoang N. P vi K. Phun Caltrac vi MgS0, da
C3M2. Xem xet anh htrirng cua timg nhan to Caltrac
c6 tic dOng den wow dO quang hqp, gia tang ding
va MgS0, cling nhti sq kat hop ala hal yeti to nay dO CO2
trong khoing gian bao do gia tang dO mer khi
ten CDTHN cho thiy chua co so sal khac Co
coy nghia khong. Phun 0,20% Caltrac phoi hqp 0,15% MgSO4
thong ke. nhung kat hqp phun Caltrac vi MgS0, da

tang flan& suit h6 lieu 6.68%, Wong dtrong 3,67
anh hu6ng den nang AO CO2 trong gian bao cua la he ta/ha.
Lieu vi so sal !chic nay c6 y nghia thong ke 0 dO tin
cay 95%.
TAI
TRAM KHAO
DO mb khi !thong ala cac cong thtic phun kik
1.Tan Nir Turin Nam, BM Van Khanh (2004).
hop Caltrac vi MgSO4 vii ming dO khac nhau cho h6
Nghien
thu mot s6 bien phap ky thuit canh tic cho
btu giai doan kinh doanh tren flit bazan dao dOng
trong khoang 210.1 nunol/m2/s. Cao nhit dat 393,25 cay h6 tieu i viing Tay Nguyen Brio cio khoa hoc
mmol/m2/s tai cling that C31‘12. tang 43% so vii doi thuec de tai: Nghien cim giai phap khoa hoc, cong
thing vi sq sal khac nay c6 9 nghia thong ke ei mire nghe vi thi truOng de phat then vimg he tieu nguyen
lieu, phut vu the hien vi xuit khan. Vien Khoa hoc
dO tin thy 95%.
Ky thuat Nang Lam nghiep Tay Nguyen.
3.4. Anh huong ala the n6ng do Caltrac vi
2.Phan Him Trinh vi Ong sir (1988). K thuat
MRS°,den Ming suit thy he tieu dang kinh doanh
tr6ng tieu. NXB Neing nghiep, 156 trang.
Bing 4. Anh hueng dm the ming di) Caltrac vi
3. Hoang Minh Tin vi cong so (2006). Giao
MgSO4 den fling suit thy he tieu
trinh sinh 15, thoc vat. Truong Dal hoc Wing nghiep I
Ha NOL trang 211-216.
on vj tinh:
4.VO Van Vu va Ong su (2009). Sinh 19 hoc Uwe
COng th&

M. M1 Ma M3 .,
vat NXB Giao doe Viet Nam, trang 161.
54,90 55.40 5527 55,36 55,23'
CO
5. Boyer (1982). Les Facteus de fertilitye des
C,
55.93 56.32 5478 57,00 56.5Ct
sols. ORSTOM - Part, pp. 89.110.
C,
57,29 57.36 56.93 58.07 57.416
6. Mathew. P. G., Wahid, P. A. and Niar, S. G.
56,86 57.64 5857 57.54 57.65.
C,
(1995). Soi fertility and nutrient requirement in
Trung binh M
56,25' 56,68th 56.89' 56,99'
relation to productivity in black pepper. Black Pepper
LS1)„,6 C
0,54
(lipper nigrum), pp. 163 - 203.
LSD„„s M
0,54
7.Nguyen Van Sang, Dinh Minh Hiep, Nguyen
LSD ,,,„ C•M
NS
Anh
Dzung (2013). Study on chitosan nanoparticles
CV(94) C*M
1,34
on biophysical characteristics and growth of robusta

Ghi chin Car chat& kirknhau Prong c4t to
coffee in green house. Biocatalysis and Agricultural
hang bieu thi sysai khac c-6 y nghia thong ke veil
Biotechnology, 2: pp. 289-294.
p<-0,05; NS: Sai khic khan: co Yogrhla
30

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EFFECT OF Ca, Mg ON PHYTOSYNITIESIS AND CROP YIELD OF BLACK PEPPER (tipper
n#um L) IN CU JUAN DISTRICT, DAK LAK PROVINCE
Nguyen Tien Na', 'Fran Manh Thi2, Tran Thing Dung2, Nguyen Anh Dung2
' PhD cadidate of Crop Science, Tay Nguyen University
Institute of Biotechonoloy 44} hbviromnen4 Tay Nguyen University

Summary
Study at Ea lieu commune, Cu Kuin district, Dak talc province was conducted from April 2015 to March
2016 to investigate effect of calcium and magnesium sulfate application on photosynthesis and crop yield of
black pepper (tipper nigrum L) in the prodution period. The results showed that spaying caltrac and
magie sulfate effected slightly on photosynthesis of the black pepper. Macro - and micro - nutrients was
improved and reached to optimum nutrient requirements of black pepper, yield of black pepper increased
up to 6.68% compared to the control.
Keywords: Cakrac, canid. Min Mack Pepper. OPPer n4nint PhninsYnthesis-

Ngueri phis bien: IS. Le Van Dire
Ngay ntuln bit 13/5/2016
NO), thOng qua piton bien: 14/6/2016
Ngiy duyet clang: 21/7/2016

NONG NGHleP VA PHAT WIEN NONG THON - Kir 2 - THANG 8/2016

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