Page 116 - PARVEEN, S
P. 116
from May to October and from July to October zooplanktons included the orders Cladocera and
these lands remain flooded with a water depth of Copepoda within the class Crustacea of phylum
more than 180 cm to less than 275 cm due to Arthropoda.
surface runoff of rain water and overflow of the
river canals. The area under water during this four 349 MANNAN, M.A.; HASAN, M.M.;
month period can be used for economic AHMED, M.B.; KHAN, S.A.K.U.
applications such as various types of fishery as (Agrotechnology Discipline, Khulna University,
well as enhancing the present recreational appli- Khulna) & AMIN, M.R. (Dept. of Basic & Social
cations. For these purposes the physical, chemical, Science, Sylhet Agricultural University, Sylhet).
and biological aspects of the waler are studied to Present Status of Nurseries and Problems
evaluate its suitability for the applications. The Confronted by the Nursery Owners at Phultala
study was held over the period of July through Upazilla of Khulna. South Asian J. Agric., 2006, 1
December, 2006, samples being taken once every (2), 49-54.
month. The physical parameters covered
transparency, odor, temperature, salinity, EC, TSS, The main purpose of the study was to ascertain the
andTDS. The chemical parameters of water studied present status of nurseries along with the problems
-
were pH, DO, BOD 5, COD, hardness, NO 2 -N, confronted by the nursery owners at Phultala
-
3-
-
2-
NO 3 -N, PO 4 -P, SO 4 -S, Cl , Na, K, Ca, Fe, Ni, Upazilla of Khulna District of Bangladesh. Data
Cu, Zn, Cd, Pb, and Hg. Among the biological were collected from randomly selected 101
parameters 'phytoplankton' and 'zooplankton' were respondents of Phultala Sadar, Utra, Gilatala and
qualitatively identified in microscopic observation Damodor unions of Phultala Upazilla in Khulna
up to genera. From July to October the water was District during August 2004 to May 2005. Data
transparent and of good odor, temperature ranged were collected on types and number of fruit plants,
from 28.2° C to 24.6° C, salinity within 0.58 to flowering plants, timber plants, medicinal plants
0.83 mg/L, EC within 250 to 608 µ mho/cm, TSS and mother plants, use of fertilizer and manure,
0.42 to 0.82 mg/L, and TDS within 2.8 to 5.2 propagation practices, insect and disease
mg/L. Among the chemical parameters, pH ranged infestation and problem confrontation by the
from 6.6 to 7.4, DO within 6.4 to 6.9 mg/L, BODS nursery owners. Among these 101 respondents,
within 1.5 to 3.28 mg/L, COD within 3.04 to 12.89 46.54% were young (up to 35 years), 47.53% were
mg/L, hardness 26.08 to 37.5 mg/L, NO 2--N from nursery owners and business man, 48.52% were
-
undetectable to maximum 0.562 mg/L, NO 3 -N educated at secondary level (6-10), 56.44% are
3-
within 0.539 to 2.158 mg/L, PO 4 P 2.35 to 2.75 small family holder (1-5), 61.38% nurseries were
-
2-
mg/L, SO 4 -S 0.23 to 0.29 mg/L, C1 1.65 to 6.16 established within 1996-2005, 49.50% nurseries
mglL, Na 3.6 to 12.5 mg/L, K 9.7 to 11.5 mg/L, Ca had marginal land area (<0.2 ha), 57.43%
6.52 to 14.82 mg/L, Fe 0.1269 to 0.5062 mg/L, Ni respondents had low annual income (up to
0.028 to 0.050 µg/L, Cu 0.028 to 0.043 mg/L, Zn Tk.50,000) and only 18.81% having high annual
0.023 to 0.048 µg/L, Cd 0.0023 to 0.0043 µg/L, Pb income(>Tk. 1,00,000) and 90.10% respondents
0.043 to 0.093 µg/L, and Hg was not detected at had low annual expenses (<Tk.50,000) for nursery
ppb level. Among the biological parameters a management. About 47.53%) nursery owners did -
number of phytoplankton were identified covering not take training and 42.57% nursery owners were
the classes of Bacillariophyceae, Chlorophyceae, high credit borrower. Among the 101 respondents,
Euglenophyceae, and Cyanophyceae. The 97 respondents cited that they used urea and
109
