PJB-2017-921
IMPACT OF NITROGEN FERTILIZER ON SOME PHYSIOLOGICAL RESPONSES OF WHEAT UNDER NACL STRESS
Muhi Eldeen Hussien Ibrahim
Abstract
Understanding salinity-fertilizer relationships are of considerable economic importance. Salinity is one of the primary abiotic stresses, especially in arid and semi-arid regions. This study was done to determine whether the nitrogen (N) might be alleviating the negative effects of NaCl on several physiological attributes and antioxidative defense system. The results showed that high salinity significant reduce chlorophyll content (SPAD reading), photosynthesis, stomatal conductance protein content, and SOD. Moreover, salt treatment increased the activity of CAT and POD. Nitrogen application had significant effects on all the physiological parameters by enhancement of chlorophyll content, photosynthesis, protein content, SOD, POD, and CAT. All parameters were significantly affected by interaction between variety and nitrogen except CAT. Interaction between variety and salinity was significant for protein content, SOD, and CAT. Protein, SOD, POD, and CAT were significantly affected by interaction between nitrogen treatment and salinity. In this study, the application of nitrogen fertilizer was successful for alleviating the adverse effects of salinity, moreover among all nitrogen levels used in this study 210 kg/ha was most effective on most parameters that measured. The results of study will help to give practice for increasing yield by taking suitable varieties and nitrogen management on saline soils.
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