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seasons (viz., winter. summer and rainy) from July Agricultural Extension, Rajshahi University,
2002 to June 2003. A total number of 20 and 38 Rajshahi). Phytosocial investigation on the local
species were recorded in the industrial and non- flora of four microhabitats in response to seasonal
industrial areas respectively. It was observed that variations. Bang. J. Life Sci., 2006, 18 (2), 121-
in the industrial area 2 species viz. (Cynodon 129.
dactylon and Oplismenus compositus were
dominants with high IVI (importance value index) A phytosocidsl investigation was carried out on the
during all the 3 seasons. On the contrary, in the local flora in the Rajshahi University Campus on
non-industrial area 4 species viz. Cynodon four microhabitats (viz. sunny dry, sunny wet,
dactylin, Clerodendrum viscosum, Oxalis shady dry and shady wet) during three seasons
corniculoata and Oplismenus compositus were (viz. winter, summer and rainy) from November,
found to be dominant. As regards the life form 2000 to October, 2001. A total number of 52
categories the percentage of hemicryphytes were species were recorded during the study period.In
maximum during all the seasons in both the areas. the rainy season both the number of species (47)
In terms of diversity index values, the flora of the and diversity index were higher as compared to
industrial area showed relatively low index values winter and summer seasons. During winter season
as compared to that of the non-industrial area. Centella asiatica (L.) Urban., Cynodon dactylon
Pers. and Imperata cylindrica (L.) P.Beauv. were
129 KHAN, Z.U.M.; MUBASSARA, S. & co-dominants with high important value index
SHANTA, N.A. (Dept. of Botany, Jahangirnagar (IVI) values in the sunny microhabitat.In the shady
University, Savar, Dhaka). Effect of Azospirillum one, Axonopus cimicinius Beauv., Colocasia
inoculation on growth and yield of foxtail millet esculenta (L.) Schott., Centella asiatica (L.)
(Setaria italica L.). Bang. J. Life Sci., 2006, 18 (1), Urban, clerodendrum viscosum Vent., Aerva
63-67. lantana (L) Juss., Altrnanthera phyloxeroides
(Mart.) griseb. and Cynodon dactylon Pers. were
A field study was conducted to ascertain the effect important as competing species. During summer
of Azospirillum inoculation on growth and yield of season, Aerva Lantana (L.) Juss., Centella asiatica
Setaria italica L.The results revealed that (L.) Urban, Eclipta alba (L) Hassk. and Piper
Azospirillum inoculation significantly increased the Iongum L. were found as co-dominants in the
growth of the plants and also the yield of seed and sunny dry microhabitat. In the sunny wet
hay.The highest increase of panicle weight was microhabitat, however, Alternanthera
observed with the plant inoculated with strain S-5 philoxeroides (Mart.) Griseb., Centella asiatica
whereas the lowest increase was with the strain S- (L.) Urban., Cynodon dactylon Pers., Oplismenus
4. In case of seed yield, the maximum weight of compositus (L.) P.Beauv., Piper longum L.,
100 seeds was 0.261 g for the plants treated with Polygonum hydropiper L. and Vitis trifolia L. were
S-6 and S-5 strains, and the minimum was found in commonly found. In the shady one, eight species
uninoculated control plant.Similarly highly including Commelina benghalensis L., Eclipta
significant increase was found in hay yield because alba (L.) Hassk., Oplismenus compositas (L.)
of inoculation treatments. Among the collected P.Beauv. and Oxalis corniculata L. were well
Azospirillum strains, S-3 treated plants gave distributed. During rainy season most of the
highest quantity of hay per plot whereas the lowest species including Centella asiatica (L.) Urban.,
quantity of hay per plot was obtained from Colocasia esculenta (L.) Schott., Cynodon
uninoculated control plot. Of all the selected dactylon Pers.. Cyperus rotundus L., Eclipta alba
strains, S-3 was found to be best one in enhancing (L.) Hassk., Ludwigia adscendens (L.) Hara and
the growth and yield of foxtail millet (Setaria Vitis trifolia L. were found to grow well with high
italica). IVI values. In all the microhabitats five species
namely, Centella asiatica (L.) Urban., Cynodon
130 SHAMSI, A.; RAHMAN, M.S. (Dept. dactylon Pers., Eclipta alba (L.) Hassk., Sida
of Botany, Rajshahi University, Rajshahi) & cordifolia L. and Colocasia esculenta (L.) Schott.
TARIQUE, M.H. (Dept. of Agronomy and were found as common species during three
seasons. The % number of phanerophytes and
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