عمار جابر
27-10-2009, 03:27 PM
Introduction:
The use of urban wastewater in agriculture is old practice that is receiving renewed attention with the increasing scarcity of fresh water resources in many arid and semi-arid regions. Driven by rapid urbanization and growing wastewater volumes, wastewater is widely used as a low cost alternative to conventional irrigation water.
The experiment
The experiment was curried out to evaluate the using of treated wastewater for irrigating forage sorghum (Sorghum bicolor) in long and short term.
1. Short term:
In this termSoba Treated Wastewater was analyzedbefore the experiment and compared with FAO standard for irrigation water. The analysis showed that most of parameters lie within slight to moderate levels. However, HCO3, Co and Cu recorded values higher than the maximum permissible levels, (Table 1).
Soil samples were analyzed before applied Treated Wastewater and at the end of the experiment. Table (2) showed that there is increasing in N,OC., K, Na, Ca, Mg, Cu, Zn, Mn, Pb and pH in soil after treatment.
The quality of produced forage was found within the standard level with reference to the standard of the National Academy of Sciences, USA, table (3).
2. Long term
Table 4 shows the comparison between application of treated wastewater for ten years (S2) with one never received treated wastewater (S1) at Yarmook Farm. The results showed that the application of treated wastewater for a long time increased pH, Ec, N, OC, K, Na, Ca, Mg, Cl, Cu, Mn, Fe, Zn and Pbin the soil. Results also reflected that Na and Cl concentrations increased sharply, while no increase was found in phosphorus (P).
The use of urban wastewater in agriculture is old practice that is receiving renewed attention with the increasing scarcity of fresh water resources in many arid and semi-arid regions. Driven by rapid urbanization and growing wastewater volumes, wastewater is widely used as a low cost alternative to conventional irrigation water.
The experiment
The experiment was curried out to evaluate the using of treated wastewater for irrigating forage sorghum (Sorghum bicolor) in long and short term.
1. Short term:
In this termSoba Treated Wastewater was analyzedbefore the experiment and compared with FAO standard for irrigation water. The analysis showed that most of parameters lie within slight to moderate levels. However, HCO3, Co and Cu recorded values higher than the maximum permissible levels, (Table 1).
Soil samples were analyzed before applied Treated Wastewater and at the end of the experiment. Table (2) showed that there is increasing in N,OC., K, Na, Ca, Mg, Cu, Zn, Mn, Pb and pH in soil after treatment.
The quality of produced forage was found within the standard level with reference to the standard of the National Academy of Sciences, USA, table (3).
2. Long term
Table 4 shows the comparison between application of treated wastewater for ten years (S2) with one never received treated wastewater (S1) at Yarmook Farm. The results showed that the application of treated wastewater for a long time increased pH, Ec, N, OC, K, Na, Ca, Mg, Cl, Cu, Mn, Fe, Zn and Pbin the soil. Results also reflected that Na and Cl concentrations increased sharply, while no increase was found in phosphorus (P).