Agronomic responses of diverse bread wheat genotypes to phosphorus levels and nitrogen forms in a semiarid environment

Increasing wheat production has become an urgent requirement to cope with rapid population growth and abrupt climate change. The management of phosphorus (P) nitrogen (N) is one the most important factors for sustaining increasing production, particularly in semiarid environments. This 2-year field study, which aimed investigate effect P levels (0, 35, 70 kg P2O5 ha−1) N forms (urea, ammonium sulfate, nitrate) on yield attributes three diverse high-yielding commercial cultivars (‘Shandawel-1’, ‘Sids-14’, ‘Sakha-95’), was carried out at Om-Elzain Village, Zagazig, Egypt. results indicated that accompanied by a substantial increase all evaluated traits, except spike length, high level (70 superior. Considerable genetic variation detected among studied traits. Cultivar ‘Sakha-95’, followed presented vigorous enhancements components, grain yield, biological yield. Furthermore, ‘Sakha-95’ recorded highest agronomic use efficiency, cultivar ‘Sids-14’. did not significantly affect tested traits plant height, number m−2, 1000-grain weight, during both seasons. Ammonium-containing fertilizer (ammonium sulfate resulted values these when compared urea. Accordingly, ‘Sids-14’ are recommended under levels. had marginally its attributes.