|
Pak. J. Bot., 43(2): 1033-1044, 2011. |
Back to Contents | ||||
|
|
Updated: 07-04-11 | ||||
|
|
EFFECT OF USING WASTE WATER FOR TOMATOMOHAMMAD JAMAL KHAN1, MOHAMMAD TARIQ JAN2, FARHATULLAH3, NAQIB ULLAH KAH3, MOHAMMAD ARIF2, SAJIDA PERVEEN1, SHAH ALAM4 AND ABBAS ULLAH JAN5
Abstract: Field experiment near Palosi
drain was conducted to study the effect of tube well (TW) and waste
water (WW) with or without basal dose of NP and K on the yield and heavy
metal uptake of tomato during 2008. The soil of the experimental site
was sandy loam, slightly alkaline, moderately calcareous with
phytotoxically high concentration of Cu, Fe and Mn while Cd, Cr, Ni, Pb
and Zn were less than the levels considered toxic to the plants. The
tomato biomass was significantly (p<0.05) affected by different
treatments. Taller plants and higher biomass was produced in plots
receiving WW with or without NP and K and TW water receiving basal dose
of NP and K while lower biomass and shorter plants were produced in
plots receiving only TW water indicating the nutritive value of WW
application. The results of metal concentration in leaves and fruit
showed that with exception of Cd, there were significant variation
(p<0.05) in the plant uptake of metals when irrigated with different
supply of irrigation water. The overall results showed that leaves
accumulated higher concentration (with exception of Cu) of heavy metals
studied compared to fruit. The concentration of Cr, Fe, Mn Pb and Zn in
leaves was above the permissible limits when irrigated with waste water
while waste water supplemented with fertilizers showed reduction in
heavy metals uptake. The concentration of Fe and Pb was above the
permissible limits in fruits indicating toxicity. It was also noted that
plants receiving sole application of WW accumulated more heavy metals
compared to WW plus half dose of NP and K while the TW irrigated plots
accumulated less heavy metals indicating that their was no build up of
heavy metals in the river bed soils because of its coarse texture. It
can be concluded that tomato can be irrigated with effluents containing
moderate supply of heavy metals on coarse textured soil.
|
||||
|
|
|||||
| Back to Contents |
|
Back to Contents | |||
|
|
|||||