HI?U QU? C?A VI KHU?N C? D?NH D?M GLUCONACETOBACTER DIAZOTROPHICUS VA VI KHU?N HOA TAN LAN PSEUDOMONAS STUTZERI TREN CAY MIA D??NG (SACCHARUM OFFICINALIS L.) TR?NG TREN D?T PHEN T?NH LONG AN

ABSTRACT

Long An province had a large sugarcane-cultivation area (more than 15,600 ha) but sugarcane yield (65.3 tons/ha)[2009-2010 cropping-season] was low and need of sugarcane source to provide for two sugar-processing factories in the province was high. However sugarcane-cultivation area has to be restricted because of high cost for high inorganic fertilizer. Objective of the study was to evaluate the efficiency of Biofertilizer with two strains: N₂-fixing Gluconacetobacter diazotrophicus and phosphate-solubilizing Pseudomonas stutzeri was evaluated on sugarcane cultivating on acid sulphate soil of two districts (Ben Luc and Thu Thua) in Long An province. The results showed that sugarcane yield in 500 kg biofertilizer plus 103.5 ? 80 P₂O₅/ha treatment did not differ with yield of sugarcane in 207 N - 160 P₂O₅/ha treatment but sugar content and total amount of sugar total/ha in biofertilizer treatment were higher than in inorganic fertilizer treatment (207 N - 160 P₂O₅/ha) significantly. Application of biofertilizer [500 kg/ha] not only saved 103.5 N ? 80 P₂O₅kg/ha but also had the highest benefit in sugarcane production.

Keywords: biofertilizer, soil fertility, sugarcane, sugar content, yield

Title: Effects of nitrogen-fixing Gluconacetobacter diazotrophicus and phosphate-solubilizing Pseudomonas stutzeri on sugarcane (Saccharum officinalis L.) cultivated on acid sulphate soil of Long An province

ToM T?T

T?nh Long An co vung chuyen canh mia d??ng l?n (tren 15.600 ha) nh?ng nang su?t th?p (65,3 t?n mia cay/ha )[nien v? 2009-2010] va mia cay la ngu?n cung c?p nguyen li?u cho hai nha may d??ng trong t?nh. Tuy nhien, di?n tich tr?ng mia thu h?p d?n do chi phi s?n xu?t mia cao (gia phan hoa h?c cao). M?c tieu c?a d? tai la danh gia hi?u qu? phan sinh h?c v?i hai ch?ng vi khu?n c? d?nh d?m Gluconacetobacter diazotrophicus va vi khu?n hoa tan lan Pseudomonas stutzeri d??c danh gia tren cay mia tr?ng tren d?t phen c?a hai huy?n Th? Th?a va B?n L?c, t?nh Long An. K?t qu? cho th?y khi bon 500 kg phan sinh h?c/ha ? 103,5 N - 80 P₂O₅kg/ha cho nang su?t mia cay t??ng d??ng v?i mia bon 207 N - 160 P₂O₅kg/ha nh?ng ch? d??ng va t?ng l??ng d??ng/ha cao h?n cay mia ch? bon phan hoa h?c (207 N - 160 P₂O₅/ha) m?t cach r?t co y ngh?a. Nh? v?y vi?c bon 500 kg/ha phan sinh h?c cho cay mia khong nh?ng ti?t ki?m d??c 103,5 N - 80 P₂O₅/ha ma con thu l?i cao nh?t trong canh tac mia d??ng.

T? khoa: ch? d??ng, d? phi d?t, mia, phan h?u c?-vi sinh, nang su?t

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Tác giả: Cao Ng?c Di?p, NGUYEN VAN NGAU, Nguy?n Thanh Tung

Tạp chí: THE CLRRI-IRRI INTERNATIONAL CONFERENCE

Phat hi?n vi khu?n Azospirillum lipoferum n?i sinh trong cay lua mua d?c s?n (Oryza sativa L.) tr?ng ? vung DBSCL.

(2009) Trang:

Tác giả: Cao Ng?c Di?p, Ph?m Th? Khanh Van, LANG NGOC DAU

Tạp chí: Nh?ng v?n d? nghien c?u c? b?n trong KH S? s?ng

Nh?n di?n vi khu?n n?t r? n?i sinh trong cay lua b?ng k? thu?t PCR-ARDRA IGS (AMPLIFIED 16S-23S?)

(2011) Trang:

Tác giả: Cao Ng?c Di?p, Nguy?n Th? Ng?c Bich

Tạp chí: Bao cao khoa h?c H?i ngh? CNSH Toan qu?c 2009

Phan l?p va tuy?n ch?n cac ch?ng vi khu?n Pseudomonas co kh? nang hoa tan lan va sinh t?ng h?p Auxin cao

(2011) Trang:

Tác giả: Cao Ng?c Di?p, TRAN THANH PHONG, Tr?n Th? Giang

Tạp chí: T?p chi Nong nghi?p & PTNT