Int. J. Agron. Agri. Res.12(3), 19-24, March 2018
High quality and vigorous seeds perform better physiological activities, and therefore play a key role in successful field crop production. This experiment was conducted to evaluate the effects of mother plant NPK nutrition on seed physiological activity and biochemical changes during seed germination in wheat. In this study three levels of NPK fertilizers (T1: non-fertilized or control, T2: 110 kg N + 60 kg P2O5 + 55 kg K2O ha-1, and T3: 200 kg N + 120 kg P2O5 + 100 kg K2O ha-1) were applied to the wheat plants and the seeds which were obtained from these plants were kept for germination test, and the physiological parameters were analyzed. The results indicated that mother plant NPK nutrition has significantly enhanced seed germination percentage, seedling fresh weight, soluble protein, phytase activity and inorganic P, and accelerated phytate metabolism during the germination period. Phytase activity was maximum on 6th day of germination and phytase level was increased by 10.4% in seeds obtained from T3 treated plants compared to T1. At the end of 7 days from germination the contents of inorganic P and soluble protein were increased by 91.7 and 41.0% with T3treatment compared to T1, respectively. Phytate breakdown resulted in increased inorganic P (4.6-fold) bioavailability on 7th day of germination compared to 0-day. From the results of this study, it can be concluded that seed viability and physiological performance of seedlings can be improved with adequate NPK fertilization of the mother plants in wheat.
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