EFFECT OF FISH FARM WASTE WATER IRRIGATION AND GROWTH REGULATORS ON GROWTH, YIELD AND QUALITY OF SUGAR BEET CROP

Abstract

In line with the sustainable agriculture, a field experiment was carried out at the Research Station of Water Management Research Institute, Wadi El-Natrun, Eg altitude 25.5 m) during 2018/2019 and 2019/2020 seasons to evaluate growth, quality, productivity and net returns of sugar beet crop under effect of two protocols of irrigation (fish farm waste water (Aqua) or ground water irrigation (well)), and spraying two concentrations (100 and 300 ppm) of each of gibberellic acid (GA3) and indole acetic acid (IAA) compared to zero ppm application. The results revealed that fish farm waste water irrigation (Aqua) was significantly more efficient than ground water irrigation on growth traits (crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR)) as well as root yield (ton/fed) in both seasons. Vice versa, ground water irrigation surpassed fish farm wastewater irrigation in quality parameters (sucrose, purity and extractable sugar (ES) percentages). Significant increases in growth traits and yield were detected for growth regulators especially 300 ppm of gibberellic acid concentrations compared to control unit (zero ppm) during both seasons. On the other hand, quality parameters of sugar beet plants were enhanced under the control unit (zero ppm) followed by the application of 300 ppm of indole acetic acid compared to other growth regulators treatments in both seasons. The maximum net return (11488 LE/fed) was achieved with fish farm waste water (Aqua) irrigation with spraying sugar beet plants by 300 ppm of indole acetic acid during 2019/2020 seasons.