Two pot experiments were carried out in the farm of Fac. of Agric.; Mansoura university during the two successive summer seasons of 2008 and 2009, to investigate the effect of soil salinity levels and some antioxidants on plants growth, yield and quality parameters of Jew's mallow (Corchorus olitorius L.). Four treatments of salinity in this study (control, 3000, 6000 and 9000 mg/l) and four antioxidants with three levels for each (ascorbic acid, salicylic acid, proline at; 100, 200 and 300 mg/l and yeast extract at; 1000, 2000 and 3000 mg/l) were used in the foliar way as well as the control treatment (tap water). The result obtained from this work could be summarized as follow:
a) All vegetative growth parameters under investigation significantly decreased as the level of soil salinity was increased.
b) Foliar spraying of jew`s mallow plants with antioxidants were significantly increased the mean values of the vegetative growth parameters as compared to the untreated treatment.
c) All antioxidant under study; the third level was most pronounced and associated with the highest mean values for all previously mentioned traits comparing with the first and second level of foliar amendments.
d) Foliar spraying of proline combined with the levels of soil salinity was superior for increasing the values of these parameters following by yeast extracts, ascorbic acid and finally salicylic acid treatment.
e) There was a significant decrease as the level of salinity was increased on No3-N and No2-N contents, while ascorbic acid was increased.