Effect of olive mill waste water on the quantitative and qualitative performance of two varieties of barley crop (Hordeum Vulgare.L [Effet des Margines sur la performance quantitative et qualitative de deux variétés d'Orge (Hordeum Vulgare.L)]

The oil extraction process from olive fruits produces a large quantity of liquid waste,so called as olive oil mill wastewaters margines which has a very strong polluting power resulting in high levels of cod (chemical oxygen demand) high salinity and a strong phenolic compounds causing environmental pollution. the exploitation of this waste without preliminary treatment is very limited considering its toxicity for soils and plants. in addition,the richness of this effluent in organic compounds and especially on potassic element represents an asset for its agronomic valorization as a fertilizer. this alternative could be regarded as promising if it is practiced in a rational way. it is within this framework that this work has been carried out aiming to study the effect of olive oil mill waste waters spreading on the quantitative and qualitative performance of barley crop. for developing this work,a randomized complete block design was installed with four amounts of margines equivalent at 0 m3/ha (t0),50 m3/ha (t1),100 m3/ha (t2) and 200 m3/ha (t3),two varieties of barley arthaoui (local variety) and pakestani (introduced variety) and 4 replications. the results show a highly significant reduction as well as of the tiller and ears number for the two varieties compared to the control according to the increase of omww concentrations. however,the behavior of crop under this effluent presents variability among the two varieties. in addition,the highest amounts either t2 (100 m3/ha) and t3 (200 m3/ha) respectively 100 m3/ha and 200m3/ha recorded a highly significant reduction compared to the control of different yield components such as the number of ears/m2,weight of 1000 seed,the dry matter and seed yield. although,this reduction was observed but it was less accentuated for the treatment with an amount of 50 m3/ha compared to the other rates.