INFLUENCE OF MINERAL FERTILIZATION DEDUCTION WITH RHIZOBIUM AND MYCORRHIZA DUAL INOCULATION ON TWO BEAN (PHASEOLUS VULGARIS L.) CULTIVARS UNDER FIELD CONDITIONS

Document Type : Research articles.

Author

Horticulture Dept.-Agric. Fac.-Damanhour Univ.

Abstract

Two field experiments were conducted 2015 and 2016 to study the
influence of rhizobium and/or mycorrhiza inoculation under 50% of
recommended mineral nitrogen and phosphorus doses compared with 100%
recommended doses of nitrogen and phosphorus (control) on growth, pods
yield and its components and leaf chemical constituents of snap bean cvs.
Paulista and red kidney bean plants. The obtained results, obviously, study
revealed that the red kidney bean showed better performance significantly than
Paulita for all the studied characters, in both seasons. Fertilization treatment of
100%NP and/or 50%NP + dual inoculation with rhizobium and mycorrhiza gave
the most favorable effect comparing with other fertilization treatments for all
studied characters, in both seasons; without significant difference between
them; except for 100%NP which gave significant higher shoot fresh weight
compared with 50%NP+RM, in both seasons. The interaction effect between
bean cultivars and fertilization treatments showed significant superiority of
100%NP or 50%NP+ dual inoculation of rhizobium and mycorrhiza with red
kidney bean for most cases without significant difference between them, in
both seasons. Results of this investigation referred to the ability of reducing
nitrogenous and phosphorus mineral fertilization with 50% by using the dual
inoculation of mycorrhiza and Rhizobium for achieving the same growth and
yield with lowering the consequential environmental hazardous from intensive
mineral fertilization use.

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