TAP CHl KHOn HOC Vft C d N G N G H f N 6 N G NGHlf P VItT Nflflll
TAI LIEU T H A M K H A O 5. Corley Holbrook C. and Thomas Stalker H.
1. Bd Anh va Biii Dinh Dinh (1992), "Ba ^003), "Peanul Breeding and Genetic philn bon va cay trSng-.Tiip chi Khoa ho,: "'=''""•''''". """« Breeding Reviews, alt, Hoi Khoa hoc dStVi?t Nam. Volume 22: p. 297-356.
2. Nguyin van Binh, Vu Dinh Chinh, «• D- O Nottidge, R.B Balogun. N.R Njoku, Nguyin Thi Con, Le Song Dir, Doan Thi '^ff'""' "f'•'""-'"^k "•''' ° " exchange acidity.
Thanh Nhan va Biii Xuan Suu (1996); «^°""'' "'"> y'"''' of gromdnut (Arachis Giao trinh Cay cang nghifp, NXB Nong h^Pogaea L in an acid ultisol. Global nghiep HaNoi journal of Agricultural Sciences. ISSN:
' . 1596-2903.
3. Hoang Minh Tam, Ho Huy Cuong, Do Thi
Ngoc va CTV (2010). Nghien cuuxac dinh ' ' ^^ 5°'"' ^- Lopez-Capel, E. Krull and R.
ca cdu cay trdng hvp ly tren dit cat Men ^°^- 2 ' " " - ^''"^'""'- "'"""' '^'•""S" ""^
biin vimg Duyen hai Nam Trung bp, Bao ^ ° ' ' " •* '^"'"^ '° °"'* ''"'"''' R'^^""'':''- cao t6ng kit khoa hoc, Vien KHKT Nong ^-. '^™" <'^''' '^^^^° '-""'' """^ *^'"'' nghiep Duyen hai NTB, Quy Nhon. Science Report.
4. Chuan Chi Chien, Ying Pin Huang, Jy Qau Ngay nhSn bii-22/8/1014 Sah, Wen Jie Cheng, Ru Yan Chang, Yueh Mgufti phan bien: TS. Phjm Quang Ha Shih Lu, Application of Rice Husk Ngay phan bien: 17/9/2014 Charcoal on Remediation of Acid Soil, Ngay duyet dang: 29/9/2014 Materials Science Forum (Volume 685).
ANH HU'O'NG CCiA S y KET HOP PHAN BON H O U CO VA V6 CO DfeN NANG SUAT LAC TREN DAT CAT TINH BJNH DjNH
• \ .-' Do Th^nh Nhan *, Hoang Minh Tam, i i ; Ho Huy Cifong, Nguyin Thi Thu'ong, Richard Bell, Surender Mann, Pham Vu Bao ABSTRACT
Effects of organic and inorganic fertilizers combination to peanut yield on the sandy soli in Binti Dinli province
The results on the influence of organic and inorganic fertilizer combination to the peanul growth, development and yield on sandy soil in Binh Dinh that performed by two experiments with combination of three organic fertilizer factors (no fertilizer, manure, rice husk biochar) and three inorganic fertilizer factors (macro, macro -t- medium and macro -i- medium -i- micro). The experiment was conducted by split plot design with 9 treatments and 3 replications. The results indicated 11.1 tons of rice husk biochar that can replace 10 tons of manure In peanut production on sandy soil, peanut yield will increase from 25.86 to 36.87% when applied combination manure with medium- nutrients and micro-nutrients and from 31.14 to 38.52% when applied combination rice husk biochar with medium-nutnents and micro-nutrients on background fertilizer that has only macro-nutrients.
Keywords: Sandy soil, peanut, organic and inorganic fertilizers, rice husk biochar, Binh Dinh province.
' Email: [email protected]
TQP CHI KHOn HOC Vfl CONG N C H £ NdNG NGHlfP VlfT NAM
I. DAT VAN DE
Binh Dinh la tinh thuoc viing sinh thai Duyen hai Nam Trung bp co dien tich nhom dat cat khoang 13,3 nghin ha. Dat cat CO tinh chSt co ban ia thanh phan co gioi nhe, ham lugng cat min cao, ham luong set vat ly thap, siic chiia am dong ruong chi khoang tir 2,5 den 12,5%, ham lugng cac chat tong s6 thap, cac chat de tieu ngheo, do do kha nSng giu: nuoc va giu dinh duong la rat kem. De Idiai thac co hieu qua va timg buoc cai tao dat cat ben canh viec lua chpn cay ho Dau (cSy lac) trong co cau cay trong thi viec bo sung nguon vat lieu huu co (than trau) de tang kha nang giir va cung cap nuoc, dinh duong cho cay trong tren dat cat la rat hiiu ich.
Trong san xuat nong nghiep, de tang nang suat cay trong thi viec bo sung phan hoa hpc la khong the thiSu dac biet la tren dat cat. Tuy nhien, viSc lua chgn nguyen to hay nhom nguySn t6 nao cho timg loai cay tr6ng trdn timg loai ddt khac nhau la r4t quan trpng. Do VEiy, de tang hieu qua san xuat lac tren dat cat tinh Binh Dinh, viec danh gia vai tro cua timg nhom nguyen to (da lupng - N, P, K; trung lugng - S va vi lugng - Zn, Cu, Mo, B) k6t hgp vai mot s6 vSt li$u hihi CO (phan chuong va than triu) la het siic can thiet.
II. VAT LIEU VA PHirONG PHAP NGHIEN CUfU
1. Vat lieu nghien cu>u - G i 6 n g l a c : L D H 0 1 .
- Cac loai phan bon va hoa chdt: Phan chu6ng hoai muc, than trdu, CO(NH2)2, KCl, K2SO4, voi bpt, NaH2P04, CUSO4, ZnS04, H3BO3, (NH4)6Mo7024.4H20.
2. Phu'O'ng phap nghien ciru 2.1. Bo tri thi nghiem
Thi nghiem gom 9 cong thuc dugc bo tri theo kieu 6 Idn 6 nho vol 3 lan nhac lai, dien tich mfii 6 thi nghiem nho la 15m^
Nhan t6 chinh T r Da lifting (N,P,K) T2. Da \ijf(yng + Trung lifffng (S)
T3. Da tu-prig + Trung lu'P'ng + Vi lu'P'ng {Cu, Zn, B, Mo)
Nhan td phu N: Khong bon h&u co' M: BontOtan phan chu6ng/ha B: Bon 11,1 tan than trau/ha Cong thirc thi nghi$m:
NT1:N+T1 NT2: N + T2 NT3. N + T3
MT1:M + T1 MT2: M + T2 MT3' M + T3
BT1:B+T1 BT2: B + T2 BT3: B + T3 2.2. Lieu tuxyng va cac loai phan bon ap dung cho 1 ha
TI = 65,20 kg CO(NH2)2 -i- 152,10kg NaH2PO,-i-95,0kgKCl;
T2 = 65,20 kg CO(NH2)2 + 152,10kg NaH2P04+ 110,95 kg K2SO4;
T3 12 + 6,0kg CUSO4 -I- 1,0kg (NH4)6Mo,024.4H20 -I- 10,0kg ZnS04 -t 1,43kg H3BO3;
N = Khong bon; B = 11,1 tdn than trdu;
M = 10,0 tan phan chu6ng hoai muc;
2.3. Khoang each va mat do gieo Khoang each gieo: 30cm x 10cm x 1 hat/hoc.
Mat do: 33 c a y W .
2.4. Dia diem va tinh chat dat truvv khi then khai thi nghiem
I- Dia diem trien khai thi nghiem: xa Cat Trinh, huyen Phil Cat, tinh Binh Dinh
Thtr nghiem 1: VI do: 14°01'07,1"
Kinhdo:109°02'43,l";
Thir nghiem 2: VI do: I4°01'09,5" - Kinh dp: 109°03'51,3";
40
HIP i.ni KHOA HOC VH CONG NGHC NONG NCHlIP VllT NAM
2- Tinh chat ddt truac khi Iriin khai thi nghiem
Bang 1. Tinh chat dAt tr6ng truoc khi tijn hanh thi nghiem
Chi tieu Set (%) Thit (%) Cat (%) PHH!O(1:5) PHKCI (1 5) EC (dS/m) 0C(%)
Thi> nghiem 1 0-15cm
2,80 8,66 88,54 6,11 5,23 0,014 0,09
15-35cm 2.60 2,02 95,48 5,43 4.34 0.020 0,19
35-53cm 2.60 3,28 94,12 5,14 4,53 0,029 0,14
53-70cm 2,70 2,94 94,36 4,94 4,63 0,055
0.16
>70cm 2,80 2,49 94,71 5,02 4,69 0,116 0,12
ThlP nghiem 2 0-12cm
1.55 1,90 96,55
5,61 5,44 0,175 0,11
12-23cm 2,50 2,95 94,55 6,24 5,89 0,030
0.07 23-47cm
3,10 4,54 92,36 5,86 4,57 0,023 0,01
>47cm 5,20 7,41 87,39 4,94 4,19 0,041 0,16
Ket qua phan tich 6 bang 1 cho thky, dat 6 ca hai khu vuc thir nghiem d^u thuoc nhom dat cat, tuy co sir sai khac nho a mot so chi tieu nhimg su sai khac nay la khong dang ke ve mat tmh chit chung cua ddt cat.
2.5. Cac chi tieu theo doi
Theo QCVN 01 - 57: 2011/BNNPTNT.
2.6. Xu" ly so lieu
So lieu cac thuc nghiem dugc xii ly theo phuong phap th6ng ke sinh hpc thong
qua phan mem IRRISTAT va Excel.
III. KET QUA VA THAO LUAN
1. Anh hu'O'ng cua phdn bon d§n nan^
su^t va cac yeu td cSu thanh nang suiit cua cay l^c tren dSt cat
_ Nang suat va cac yeu to cau thanh nSn^
suat la cac chi tieu dugc cac nha san xuat dac biet quan tam. Ket qua theo doi cac chi tieu nang suat va cac yeu to cau thanh nSng suat dugc trinh bay trong bang 2, 3, 4 va 5.
Bang 2. Anh huorig ciia phSn b6n den tong so qua/cay cua lac tren dat cat tinh Binh Dinh, nam 2012
Don vi tinh: qud/cdy
" ^ ^ ^ Voco-
HO-u CO" ' ^ ^ ^ " ' " " • " S 1 Trun?lilyng
Da + Trung
+ Vi luvng Trung binh Thi> nghifm 1 :
Khong bon hO'u ca Bon phan chuong Bon than trau Trung binh CV(%) LSDos(VC) LSDi:s(HC) LSD OS (VCxHC)
14,70 16,90 16,85 15,48
17,20 16,73 16,75 16,89 8,3 1.1S 1.13 2,07
17,40 16,98 18,75 17,71
16,43 16,54 17,12
ThO* nghiem 2:
Khdng bon huu co Bon phSn chu6ng BOn than trau Trung binh CVI%) LSDoslVC) LSDm'HC) LSDalVCxHCI
13,88 14.70 14.45 14,34
14,73 16,70 17,63 16,35 10,0 1,35 1,62 2,35
15,20 17,65 17,75 16,87
14.60 16.35 16.61
Ghi chu: HC = him ca; VC = v6 ca
TAP CHi KHOn HOC Vfl CdNG NGHC NONG NGHlIP V U T NAM
Ket qua bang 2 cho thay: Phan bon v6 co da the hien ro vai tro doi vcd cay lac tren dat cat, o miic dp tin cay 95% ta co the ket Iuan:
bon bo sung 20 kg S/ha da cho so qua/cay cua lac tang tir 1,41 - 2,01 qua/cay (tuong ting voi 9,11 - 14,02%) va bon ket hgp ca phan trung
luong va vi luong thi so qua/cay cua cay lac tang tir 2,23 - 2,53 qua/cay (14,41 - 17,64%).
Khi b6 sung kit hgp giiia than triu voi ph^
trung va vi lugng ciing cho so qua/cSy cua cay lac tSng tir 3,87 - 4,05 qua/cay (27,55 - 27,88%) o miic do tin cay la 95%.
Bang 3. Anh huong cua phan bon den so qua chac/cay ciia lac tren dat cat tinh Binh Dinh, nam 2012
Ban vf tinh: qud/cdy
H^::;: ~ ^ 1 ' " | ^^'"^^ | D a . T r u n g , „ ; , n g | %;;'J^^ Trung binh Thi>nghifm 1:
Kh6nq bon huu co Bon phan chuonq Bdn than trSu Trung binh CV(%) LSDoslVC) LSD„(HC) LSDostVCxHC)
13.33 14.23 14.78 14,11
14,23 14.88 15,18 14,76
15,20 15,18 16,78 15,72 9,6
1,23 1,38 1,3a
14,25 14,76 15,58
Thir nghiem 2:
Kh6ng bon huu co Bon phan chuonq Bon than trau Trunq binh CV(%) LSDosVC LSDasHC LSDoi(VCxHC)
11,60 11,85 11,35 11.57
12.23 12,64 12,40 12,39
12,83 13,15 13,18 13,05 8,5
0,90 0,93 1,57
12,19 12,51 12,31
Ghi chu: HC = httu ca; VC = vfl ca
So lieu trong bang 3 cho thay, khi cay lac dugc bon day du cac nguyen to da, trung va vi lugng da cho so qua chic/cay tang tir 1,61 - 1,48 qua/cay (tuong ung voi 11,41 - 12,79%) so voi chi bon phan da lugng 6
miic dp tin c^y 95%. Tuong tu nhu tong so qua/cay, so qua chac/cay cua Igc cung t5ng tu 1,68 - 3,45 qua/cay (14,61 -^25,88%) o muc dp tin cay 95% khi bon h6 sung dian trau ket hgp voi phan trung va vi lugng.
4. Anh huong cua phan bon den khoi lugng 100 qua cua lac tren dk cat tinh Binh Dinh, nam'2012
Dan vi tinh: gam
^~^^~^^^^^ Voco"
Huu CO" -—-....^^^ Da luo'ng Da + Trung lu'P'ng Da + Trung
+ Vi [uvng Trung binh Ihu nghiem 1:
Khong b6n huu CO Bon phan chuong Bon than trau Trung binh CV(%) LSDoslVC) LSDoslHC) LSD OS (VCxHCj
193,79 197,14 205,48 198,80
186,43 214,04 199.66 200,04
194.30 205,90 214.19 204,80 0,3
0,39 0,39 0,68
191,51 205,69 206,44
42
TRP CHI KHOn HOC VA CONG NGHC N O N G NGHICP VllT NHM
^ ^ ^ ^ ^ V o c e
HCru CO- ^ " ~ ~ ~ ^ ^ ^ ^ Da luvng Da + Trung \imng Da + Trung
+ Vi luo'ng Trung binh Thu" nghif m 2:
Khong bon hO'u CO Bon phan chuOng Bon than trau Tnjng binh CVf%) LSDoslVC) LSDoslHC) LSD OS IVCxHC)
160.00 172.39 174.01 168,80
162,27 175,65 183,65 173,86
168,64 177.44 184.61 176.90 0,9
1,39 1,39 2,40
163,64 175,16 180,76
Ghi chii: HC = h&u ca; VC = v6 ca
KSt qua thu dugc 6 bang 4 da thi hien rq hon vai tro cua tiing nhan to phan bon doi voi cay lac tren dat cat:
Doi vcfi nhan to hiiu co, bon phan chuong cho khoi lugng 100 qua tang tir 11,52 - 14,18 gam va bon than trau tang tir 14,93 - 17,12 gam o miic do tin cay 95%.
Doi voi nhan to v6 co, bon phan trung lugng cung cho khoi luong 100 qua tang 1,24 - 5,06 gam va bon ket hgp ca trung va vi lugng se tang tir 6,00 - 8,10 gam 6 miic sai khac c6 y nghTa thong ke.
Khi bon ket hgp phan chuong vdi phan trung lugng thi khoi lugng 100 qua cua lac tren dat cat cimg se tang tii 15,65 - 20,25 gam va khi bon ket hgp ca phan trung va vi lugng thi khoi lugng 100 qua tang tir 12,11 - 17,44 gam a miic do tin cay 95%.
Tuong tu, khi bon ket hop than trau voi phan trung lugng se cho khoi lugng 100 qua tang tir 5,87 - 23,65 gam va khi bon ket hgp voi ca phan trung va vi lugng se lam tang khSi lugng 100 qua tu 20,40 - 24,61 gam 6 muc do tin cay 95%.
Bang 5. Anh huong ciia phan bon den nang suat lac tren dat cat tinh Binh Dinh, nam 2012
Dan vi tinh: ig/ha
-.:^__^^ V o c a
HifuGO' ^ Da luvng Da + Trung lu<ang Da + Trung
+ Vi luo'ng Trung binh Thip nghifm 1:
KhOng bon huu ca Bon phan chuong Bon than trlu Trunq binh CVl%}
LSDoslVC) LSDoslHC) LSD OS IVCxHC)
32,79 39,83 40,75 37,79
34,73 42,99 44,23 40,65
37,14 44,88 45.42 42,48 5,0
1,72 2,40 2,98
34,69 42,57 43,47
Thu- nghi#m 2:
Khonq bon huu CO Bon phan chuonq Bon than trau Trung binh CV(%) LSDoslVC) LSDoslHC) LSD OS IVCxHC)
31,63 36,46 36,48 34,86
32,70 37,26 38,14 36,03
34.38 39,81 41,48 38,56 5,9
1,85 4,79 3,20
32,90 37,84 38,70
Ghi chi: HC - hihi ca; VC = v6 ca
43
T9P CHI KHOfl HOC Vfl CONG NGHC NdNG NGHlIP VICT NAM
So lieu trinh bay trong bang 5 cho thay:
Doi voi phan bon hiiu co, b6n 10 tan phan chu6ng/ha cho cay lac tren cat tinh Binh Dinh cho nang sudt tang tir 4,94 - 7,68 ta/ha (tuong irng voi 15,02 - 22,01%) va bon 11,1 t3n than trSu/ha se tang tir 5,80 - 8,58 ta/ha (17,63-24,59%).
Doi voi phan bon v6 co, bon bo sung phan trung lugng tren nen phan da lugng nang suat lac se tang tir 1,17 - 2,86 ta/ha (tuong ling voi 3,36 - 7,57% ) va bdn bo sung ca trung va vi lugng nang suat lac se tang tir 3,70 - 4,69 ta/ha (10,61 - 12,41%).
Khi bon ket hgp ca phan chuong va phan trung lugng nang suat lac tren dat cat tang tir 5,63 - 10,20 ta/ha (17,80 - 31,11%),
va khi ket hgp ca phan trung va vi lugng tang 8,18 - 12,09 ta/ha (25,86 - 36,87%).
Khi ket hgp bon than trdu va phan trung lugng nang suat lac tang tir 6,51 - 11,44 ta/ha (tuong irng 20,58 - 34,89%), va khi kit hgp ca phan trung va vi lugng tSng tir 9,85 -12,63 ta/ha (31,14 -38,52%).
2. Hieu qua kinh td cua vi^c bon phan khac nhau ddi vai cay l^c tren dit cat
Ngoai nang suat thuc thu, chi tieu quan tam tiep theo cua nguoi san xuat chinh la danh gia hieu qua kinh te ciia mo hinh san xuat dem lai. Ket qua thu dugc trong bang 6 va 7 cho ta biet hieu qua kinh te cu the cho timg nhan to trong thi nghiem.
Bang 6. Hieu qua kinh te cua viec b6n bo sung than trau va phan chuong cho lac tren dat cat tinh Binh Dinh, nam 2012
N6n phan b6n
Oa lupTig Da + Tmng lu'P'ng Da + Trung + Vi lu'iyng
Ddi vo'i than tr^u (ddng/ha) Chi phi
tang them 3.700.000 3.700.000 3.700.000
Thu nh|p tang them 16.000.000 18.700.000 . 19 225 000
D6i vo'i phan chudng (ddng/ha) Chi phi
tang them 5.000,000 5.000.000 5,000.000
Thu nh^p tang them 10.775.000 16 050 000 16.450.000 Ghi chiJ: Gid ban lac = 25.000 dong/kg; gid ph^n chuflng = 500 d6ng/kg, gia than trdu = 1.000 dflng/kg
Bang 7. Hieu qua kinh te cua viec bon b6 sung phan trung lugng va vi lugng cho lac tren dat cat tinh Binh Djnh, nam 2012
Ukn phSn bon
Khong phan hiiu ca Bon ph^n chuong Bon than trau
Doi vai phan trung lui^ng (ddng/ha) Chi phi tang them
510.000 510.000 510.000
Thu nhap tang them 3.750.000 9.025.000 6.450.000
D6i v&\ phSn trung lu'P'ng + vi lu'P'ng (ddng/ha) Chi phi tang thgm
1.524.000 1.524.000 1.524.000
Thu nh|p tang them 8.875.000 14.550 000 12.100.000 Ghi chli: Than trau co hieu qua san xuat trong 3 nam
Ket qua bang 6 va 7 cho thdy: Voi chi phi tang them chi 3,7 trieu d6ng/ha/vu (Hieu qua kinh te ciia than triu dugc tinh binh qu^n trong 3 nam) nhung viec bon 11,1 tan than trau/ha da cho nguoi san xudt
lac CO thu nhap tang them tir 16,0 - 19,23 trieu dong/ha/vu. Trong khi do viec bon b6 sung 10 tan phan phan chu6ng/ha/vy chi cho nguoi san xudt thu nhap tSng them tir 10,78 -16,45 trieu d6ng/ha/vu va dat cao
44
TRP CHI KHOfl HOC Vii CONG N G H £ NONG NGHllP VlfT NAM
nhat tren nen phan bon day dii ca phan da, trung va vi lugng.
Bdn bo sung 20 kg S/ha lam chi phi tang them 510.000 dong, nhung nguoi san xuat lac lai co thu nhap tang them tir 3,75 - 9,025 trieu dong/ha/vu; thu nhap ciia nguoi san xuat lac co the tang len den 14,55 trieu dong neu chi phi them 1,014 trieu dong de bdn them phan vi lugng tren nen phan chuong + da + trung lugng.
IV. KET LUAN 1. K6t Iuan
1. Sinh truong, phat trien va nang suat lac dugc tan^ len khi thay the viec b6n 10 tan phan chuong bang 11,1 tan than trau/ha;
2. Bon than trau (11,1 tan/ha) ket hgp voi phan trung va vi lugng tren nen (30kg N + 90kg P2O5 + 60kg K20)/ha, lam tang so qua chac/cay tir 14,61 - 25,88%.
3. Tren nin phan bdn (30kg N + 90kg P2O5 I- 60kg K20)/ha, bon 10 tin phan chuong ket hgp voi phan trung va vi lugng lam tang khoi lugng 100 qua cua lac tif 12,11 -17,44 gam (tuong ung voi 6,25 - 10,90%).
4. Tren n6n phan bon (30kg N + 90kg P2O5 + 60kg K20)/ha, kh6i lugng 100 qua cua lac tren dat cat se tang tir 20,4 - 25,61 gam (tuong ling voi 10,53- 15,38%) khi bon than triu ket hgp voi phan trung va vi lugng.
5. Tren nhn phan bon (30kg N + 90kg P2O5 + 60kg K20)/ha nang suat lac se tang tir 25,86 - 36,87% khi b6n kk hgp phan chudng voi phan trung va vi lugng.
6. Tren nhn phan bon (30kg N + 90kg P2O5 + 60kg K20)/ha nang suat lac se tang tir 31,14 - 38,52% khi bon kk hgp than \xku voi phan trung va vi lugng.
2. D§ nghj
Ti6p tuc nghien ciiu xac dinh lieu lupng, dang phan va phuong phap bon phan de co
du CO so dii lieu hoan thien quy trinh bon phan cho cay l^c tren dat cat tinh Binh Djnh TAI LIEU THAM K H A O
1. D6 Anh (2008). Do phi nhieu ciia ddt vd dinh duong cay trong. NXB Nong nghiep, HaNoi.
2. Phan Lieu (1981). Ddt cat biin Vi^l Nam, NXB Khoa hgc va ky thuat. Ha Noi.
3. Phan vien Quy hoach va thilt ke Nong nghiep mien Trung (2005). Chuong irinh dieu tra bo sung, chinh ly xdy dung bdn do ddt ty 1$ 1/50.000 - 1/100.000 cdc tinh Duyen hdi Nam Trung bg.
4. Vu Hiiu Yem (1998). Giao trinh phan bon vd each bon phan. NXB Nong nghiep. Ha Ngi.
5. Vien Khoa hpc Ky thuat Nong nghiep Duyen hai Nam Trung bp (2010). Tuyen tap kit qua nghien dm khoa hgc cong ngh§
giaidogn 2006 - 2010. NXB Binh Dinh.
6. Aref F (2011). Concentration and uptake of zinc and boron in corn lec^ as affected by zinc sulfate and boric acid fertilizers in a deficient soil. Life Sci. J. 8(1).
7. Seilsepour M, Rashidi M (2011). Effect of different application rates of nitrogen on yield and quality of cotton (Gossypium hirsulum). Am. Euras. J. Agric. Environ.
Sci. 10(3).
8. Tariq M, Mott CJB (2006). Effect of applied boron on the accumulation of cations and their ratios to boron in radish (Raphanus salivas L.). Soil Environ. 25(1).
9. Tariq M, Mott CJB (2007). Effect of boron on the behavior of nutrients in soil-plant syslems-a review. Asian J. Plant Sci. 6.
Ngay nhan bai: 20/8/1014
Ngiroi phan bien: PGS.TS. Nguyin Van Vilt Ngay phan bien: 25/8/2014
Ngay duyet dang: 29/9/2014
45
