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practice different interculturul operations, and took in other metal combinations. Both inhibitory and
control measures against diseases and insects- stimulating effects of Cu or Ni were observed to
pests. Among the 101 respondents, 87 respondents P. fluorescens. However, significant stimulatory
cited that damping off causes at a higher extent in effects of Cu or Ni on the luminescence values
nursery and 93 respondents cited that termites and were observed for P. fluorescens in Insch and
ants caused severe damage in nursery Boyndie soil at higher concentrations. The
management. The vital problems of nursery model indicated that there were overall
management practices were lack of loan facilities significant synergistic effects for joint toxicity of
(67.69%), low market price (58.52%), diseases and Zn:Ni, Zn:Cu and Cu:Ni to P. fluorescens in
insects infestation (44.28%) etc. Most of the Insch and Boyndie soils, i.e., the joint toxicity of
respondents felt that training facilities should be all metal mixture to P. fluorescens was greater
available on control of diseases and insects pests than when present alone. The toxicity of metals
management. was more prominent in Boyndie soil.
350 MIAH, M.R.U. (Dept. of Entomology, 351 MIAH., M.Y. (Soil Science Dept., BSMRAU,
Bangabandhu Sheikh Mujibur Rahman Gazipur); QUDDUS, K.G.; MANNAN, M.A.;
Agricultural University, Salna, Gazipur); PATON, ISLAM, M.S. & AHMED, R. (Agrotechnology
G.I. & WILSON, M.J. (Dept. of Plant and Soil Discipline, Khulna University, Khulna). Yield Status
Science, University of Aberdeen, U.K.). Joint of High Yielding Rice Varieties Grown on Saline
Toxicity of Heavy Metals to Lux-Marked Bacteria Soil. South Asian J. Agric., 2006, 1 (2), 76-79.
Pseudomonas fluorescens in Two Different Types
Soils. Bang. J. Microbiol., 2005, 22 (1), 50-54. A field experiment was conducted during July to
December 2002 in aman season to evaluate the
The sole and joint toxicity of zinc (Zn), copper yield attributes of three high yielding rice varieties
(Cu) and nickel (Ni) simultaneously to the at different locations of Metropolitan Agriculture
bioluminescent biosensor Pseudomonas Area, Khulna. The experiment was laid out in a
fluorescens 10586r pUCD607 in Insch and Randomized Complete Block Design (RCBD) with
Boyndie soil was variable depending on the three high yielding varieties BRRI dhan 32, 33 and
concentration and as well as the soil types. 39, in eight locations coupling urea treatment and
Among the mixtures of metals (Zn:Ni, Zn:Cu replicated thrice. BRRI dhan 32 yielded significant
and Cu:Ni), in Zn:Ni mixture Zn had a (P>0.01) results on plant height, number of panicle
significant toxic effect on P. fluorescens only in per hill and yield. Based on data presented, it can
Boyndie soil but not in Insch soil. Ni had be concluded that BRRI dhan 32 is a potential
significant inhibitory effect on the luminescence candidate to be cultivated in parts of South West
of P, fluorescens neither in Insch or Boyndie Bangladesh in saline soil.
soil. In Zn:Cu mixture Zn was found to be toxic
to P. fluorescens in Boyndie soil but not in Insch 352 RAHMAN, M.M.; KHAN, U.M. (Dept. of
soil. No significant inhibitory effect of Cu was Botany, Jahangirnagar University, Savar, Dhaka)
observed for the luminescence response of P. & HOQUE, S. (Dept. of Soil, Water &
fluorescens in Insch and Boyndie soil. Again in Environment, Dhaka University, Dhaka). Nitrogen
Cu:Ni mixture the toxicity of Cu and Ni was fixation and respiratory activity of Azospirillum
somewhat different from the toxicity of metals
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