Effect of adding treated olive mill wastewater with biologically method on some soil fertility and the plant production

The addition of olive mill wastewater in large quantities causes damage to soil due to its high content of phenolic compounds, this research aims to reduce the amount of these compounds by biological treatment and test them on the Triticale plant. The olive wastewater was treated by adding biological additions before adding it to soil. A study was carried out for planting pots in the season 2020, and it was designed in a Randomized Complete Block by 7 treatments: control (without adding wastewater), raw wastewater, wastewater treated biologically by Penicillium sp and Aspergillus flavos, wastewater treated by Bactria Pseudomonas sp and Bacillus sp, wastewater treated by the both genus of fungi and bacteria, in three replicates. The results showed that there were significant differences between all the biologically treated treatments compared to the control (T) in terms of the studied indicators. Regarding phenolic compound analysis treatment, (MWP) reached (578.1) mg/l and significantly exceeded the control (T) which was (0 mg/l). (MWPs) treatment was significantly superior with (53.27 mg/kg) comparing to control (T) (36.13 mg/kg). (MWPs) treatment was significantly superior for available potassium with (730.3 mg/kg) compared to control (T) (374.5 mg/kg). Significant superiority for soil content of total magnesium was for (MWPABPs) treatment, with (474 mg/kg) compared to control (T) (247 mg/kg). For soil content of available phosphor, Regarding total vital counting of soil fungi's, MWP treatment which reached (18.033 ×103) was significantly superior compared to control with (T) (3.900×103). For total vital counting of soil bacteria, treatment MWPs was significantly superior with (17.70×106) compared to control (T) with (8.41×106).(MWP) treatment was significantly superior with (64.980 cm) for plant height compared to control with (T) (53.510 cm). For spikes length, (MWP) treatment was significantly superior with (8.367 cm) compared to control (T) with (5.647 cm). For number of seeds per spike, (MWP) treatment was significantly superior with (61.15) compared to control (T). Regarding average of biological yield, MWP treatment exceeded control treatment (T) (7704 kg/ha) with average of (9729 kg/ha). For total yield of seeds, MWP treatment was significantly superior with (3009 kg/ha) compared to control (T) (2578 kg/ha). Regarding seeds' content of total nitrogen, MWA was significantly superior (2.820 %) compared to control (T) with (2.163 %). For seeds' content of total phosphor, MWA was significantly superior with (0.496 %) compared to control (T) with (0.429%). For seeds' content of total zinc, MWA was significantly superior with (14.98 mg/kg) compared to control (T) with (11.19 mg/kg).