Two field trials were conducted at extension field on El-Nakaria Village, Zagazig district (Sharkia Governorate) during 2014/2015 and 2015/2016 to study the effect of Rhizobium treatment (treatment and un-treatment) to phosphorous fertilizer levels (0.0, 15.5, 31 and 46.5kg P2O5/Fad) on three cultivars (Misr-3, Sakha-1 and Nubaria-2).
The results showed that rhizobium treatment was superior to un-treatment in plant height (cm), number of branches/plant, number of pods/plant, number of seeds/pod, seed index (gm), seed weight plant (gm), seed yield (ton/fad), straw yield (ton/fad) and biological yield (ton/fad). All studied characters were differ significantly, except, number of seeds/pod and biological yield in the first season and seed yield (ton/fad) in the second season. Increasing phosphorous levels from 0.0, 15.5, 31 and 46.5 kg P2O5/fad. increased significantly the studied characters. In general, adding 46.5kg P2O5/fad. gave the highest values, followed by 31 and 15.5 kg P2O5/fad. While zero (without applied) was lower in this respect. Significant differences were found between three cultivars. Sakha-1 cv. was tallest in plant height (cm), and highest number of seeds/pod and straw yield (ton/fad). While, Nubaria-2 cv. was highest in number of pods/plant, seed weight plant (gm), seed yield (ton/fad) and biological yield ton/fad.. However, the three cultivars did not significantly affected in seed index (gm) in both seasons and combined.
The results indicated that seed yield ton/fad showed significant and highly significantly correlation with studied characters. i.e. plant height (cm), number of seeds/pod, number of pods/plant and germination index.
Conclusively, all characters studied R- treated surpassed that untreated when all four P- levels. Also, nubaria2 cv. gave the highest straw, seed and biological yields.