Diversity of Nitrogen Fixing Bacteria Based on nijH Gene in Rice Fields

EISSN: 1998-1066 (Online) ISSN: 1995-0756 (Print)

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Subject Area: Environmental Science I Agricultural and Biological Sciences

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1999 2000 2001

2002 2003 2004 2005 2006 2007

Agricultural and
Biological Sciences
(miscellaneous)

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Network for Scientific Information. Publication type: Journals. ISSN: 19981066, 19950756

Coverage: 2009-2013
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Environmental Science
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2008 2009

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rcild 60 DAP
Control 90 DAP
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60 OAP. (f) spread 60 OAP, (g) control 90 OAP, (h) soaked 90 DAP, (i) spread 90 OAP.
DGG£ Profile:

DGGE results showed all analyzed s.imple were separated into several separate bands. f.ach separate bands
represent one of us own species. The results showed there were three bands that always appeared in lht:
treatment every month. Control treatmenl showed the highest number of 「。ョ、セ@
with different vanattons of each
month. Snaked t:reaunem tended 10 be stable every month with 4 bands. Spread trearmcnt showed incrcasms

number of bands from 4 bands in firs1 month into 6 bands in the 1hird month (Figure 4).
fhc control u·eatmenl showed 1.he highest diYersity compared than other エイ・。ュョ
セN@ ll was probably
because there was no biofcrtilizcr applicauon then there is no dominance dfec1 at this tn:atmcn1. Btofcrt1hzcr
contain metanotroph bacterial isolates capable of enhancing the growth of rke planis. However, the 1mrnduct1on
of biofcrtilizers decreased nitrogen-fixing bacteria communities. Eventhough the highest d1vermy of nitrogenfixing bactc;:ria v.:as obtamcd in the control treatment but it had lmle role to encourage the gro"'1h of nee plan1s.
Jt can be shown by the less growth of rice plunls in conirol treatment than soaked and spn::ad lrcacmenl. There
wen: three reason to CJ.. CP{)()()llJA I

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