| dc.description | Water is a vital source for our daily accommodation but nowadays water quality is
degraded slowly but surely and city wastewater rich in organic materials and plant
nutrients are finding agricultural use as a cheap way of disposal. Use of city wastewater
in agriculture may contribute considerably to alleviate the pressure in using freshwater
resources. Application of wastewater in irrigation is an ancient practice and implemented
to a pretty large scale worldwide. There are indicators that wastewater was used back for
irrigation in ancient Greece and the Minoan civilization (3000 – 1000 BC) (Angelakis et
al., 1999). Amongst global resources, water is emerging as perhaps the most critical but
misused natural resource (Saleemi,1993) one of the most important irrigation as well as
nutrient resources is industrial wastewater, which consists of about 95% water and there
set as organic and inorganic nutrients (Saravanamoorthy and Ranjitha, 2007). At higher
pollution levels, root system is extremely lost and at maturity, plants yield are much
reduced (Joshi et al., 1999; Mondal et al., 2005). | en_US |
| dc.description.abstract | An experiment was carried out at the Agricultural Chemistry Laboratory, Hajee
Mohammad Danesh Science and Technology University (HSTU), Dinajpur during the
period from January to March and May, 2017 to assess the effects of city wastewater on
seed germination and seedling growth of Abelmoschus esculentus (lady’s finger), Vigna
unguiculata (yard long bean) and Cucumis sativus (cucumber) plants with application of
five treatments i.e. T0 (control), T1 (3ml), T2 (5ml), T3 (7ml) and T4 (10ml) waste water.
The experiment was laid out in a Completely Randomized Design (CRD) with three
replications. Analyses included pH, EC, cations (Ca2+, Mg2+, Na+
, K+
, Zn2+, Cu2+, Mn2+
and Fe3+), anions (CO3
2-, HCO3
-
, SO4
2-, PO4
3- and Cl-
) and TDS (total dissolved solids).
We also computed several variables such as SAR (sodium adsorption ratio), SSP (soluble
sodium percentage) and hardness to evaluate the suitability of city wastewater supply for
specific uses. The pH were neutral to alkaline in nature (pH= 6.9 ~ 7.23) and could be
suitable for agricultural and industrial uses. According to TDS and SAR values, all
samples were classed as ‘Freshwater’ and ‘excellent’ categories. The effect of
wastewater was compared to that of control (distilled water). The regular observation
was made on seed germination and five days span was on the growth of the plants.T0
(control) and T3 (7ml) were showed the highest germination percentage (100%) for every
month and T4 (10ml) was showed the lowest germination percentage (80%) all over the
experimental period because microbial activity was high and high toxicity showed the
detrimental effects on the germination process of seed. The speed of germination,
relative germination ratio and germination index were also highest at T0 (control) and
lowest was in T1 (3ml) condition for Abelmoschus esculentus, Vigna unguiculata and
Cucumis sativus. Shoot and root length of Abelmoschus esculentus (Lady’s Finger),
Vigna unguiculata (Yard Long Bean) and Cucumis sativus (Cucumber) during the month
of January, March and May 2017 at 5, 10 and 15 days after germination (DAG) were
gradually enhanced and highest shoot and root length found in T4 (10 ml) treatment and
lowest shoot and root length observed in T0 (control) treatment. Thus, the city
wastewater, after proper dilutions can be used as a potential source of water for seed
germination and plant growth in agricultural practices. | en_US |
