(11.13%) in nutrient solution and significantly decreased from 76.51
to 70.04 mg plant
-1
(8.46%) in effluent fish water at 1 and 2 L min
-1
flow rate, respectively. Ca uptake significantly decreased from 165.70
to 141.51 mg plant
-1
(19.59%) in nutrient solution and significantly
decreased from 75.84 to 63.71 mg plant
-1
(14.04%) in effluent fish water
at 2 and 4 m length of gully, respectively.
Mg uptake significantly decreased from 268.72 to 238.91 mg plant-1
(11.09%) in nutrient solution and significantly decreased from 200.22
to 179.97 mg plant
-1
(10.11%) in effluent fish water at 1 and 2 L min
-1
flow rate, respectively. Mg uptake significantly decreased from 268.99
to 240.68 mg plant
-1
(10.52%) in nutrient solution and significantly
decreased from 201.70 to 179.68 mg plant
-1
(10.92%) in effluent fish
farm at 2 and 4 m length of gully, respectively.
The lowest values of plant consumption were found in treatment of
effluent fish water at a flow rate of 2 L min
-1
with length of gully 4 m and
the highest values were recorded at a flow rate of 1 L min
-1
with length
of gully 2 m. Increasing the velocity of water in gullies with increasing
the flow rate decreased the rate of nutrient consumption. These results
agreed with those obtained by [23-25].
The lowest values of plant consumption were found at 4 m length
of gully and the highest values were found at 2 m length of gully. This
may be due to the number of plants in case of 4 m length as compared
with those of 2 m length. Worthy to note that pumping either nutrient
solution or effluent fish water to the growing gullies was adjusted at 1
min pumping and 4 m rest. This was performed with 1.0, 1.5 and 2 L
min-1
discharge in 2, 3 and 4 m of the gullies. Thus, the nutrient stayed
longer under the 4 m length and the total intake periods of nutrients
were longer than those achieved with the shorter gullies (2 m). The
refreshment of nutrients under the longer gullies were restricted
as compared with the shorter ones. These results agreed with those
obtained by [26].