Co-Authors:
Feigin, A., Institute of Soils and Water and Institute of Field Crops, ARO–The Volcani Center, Bet Dagon, Israel
Bielorai, H., Institute of Soils and Water and Institute of Field Crops, ARO–The Volcani Center, Bet Dagon, Israel
Dag, Y., Institute of Soils and Water and Institute of Field Crops, ARO–The Volcani Center, Bet Dagon, Israel
Kipnis, T., Institute of Soils and Water and Institute of Field Crops, ARO–The Volcani Center, Bet Dagon, Israel
Giskin, M., Institute of Soils and Water and Institute of Field Crops, ARO–The Volcani Center, Bet Dagon, Israel
Abstract:
Reuse of treated sewage effluents in agriculture is attracting much attention in Israel, not only as a useful means for preventing environmental pollution, but also as an important source of water for irrigation. Despite great differences in their sensitivity to available-N concentration, three different crops responded positively to modifications in a regular irrigation-fertilization regime. Increasing irrigation frequency increased N-uptake by Rhodes grass (Chloris gayana Kunth.), while increasing irrigation intervals in sugar beet restored sugar percentage that had dropped sharply after other irrigation treatments. Effluent irrigation replaced N-fertilization, resulting in a yield increase in cotton despite a small decline in lint percentage. A large savings of N-fertilizer was possible in all cases, and the hazards of nitrate leaching below the root zone were apparently diminished. The results indicate that adjusted management in an important tool for the control of nitrogen in effluent-irrigated fields. A similar approach may be useful also for the other components of partially treated wastewater some of which may involve long-term effects. © 1978 The Williams & Wilkins Co.
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