Effect of inoculation with biofertilizers and molybdenum on the growth and productivity of faba bean (vicia faba l. )‎ grown in sandy soil under drip irrigation

Abstract EN

Field experiments were carried out during 2016/ 2017 and 2017/2018 growing winter seasons using sandy soil under drip irrigation system, at Ali Mubark Experimental Farm, South Tahrir Region, Egypt.

The experimental layout was carried out to provide complete randomized blocks in a split- plot design.

The objective of this study to investigate the effect of application of foliar ammonium molybdate in combination with inoculation with biological fertilizers: Mycorrhiza (Glomus sp.

) andRhizobium(Rhizobium leguminosarum) on the growth performance and productivity of Faba bean (Vicia faba L.

) plant grown in sandy soil under drip irrigation.

The main treatments included foliar application of ammonium molybdate (+Mo) and without ammonium molybdate (-Mo) at rates of 5mg Mo /l and 0 mg Mo/l, respectively.

The sub main treatments included four treatments (i) biological fertilizer Mycorrhiza, (ii) Rhizobia, (iii) Mix between the two biofertilizers and (iv) without biofertilizers inoculation.

The obtained results indicated that treatment with Mo recorded high values of all parameters as compared to without Mo.

Application of biofertilizer improved all growth characters, available of N, P, K, O.

M.

and soil respiration.

The most effective treatment was obtained by the mixed RIZB/MYCO treatment followed by RIZB for N, K and by MYCO for P, O.

M.

and soil respiration.

The upper soil layer (0-30 cm) contained high values of available N or P, O.

M and soil respiration while availableP increased in the lower layer (30-60 cm).

Macro elements (N, P, K) contents in leaves and grains showed high response to addition ofammonium molybdate with the mixedRIZB/MYCO treatments followed by RIZB for N and protein, also MYCO forK and P content.

Vegetative growth characters and yield components of Faba bean plant showed high response to the mixed RIZB/MYCO treatment followed by MYCO treatment.

The results showed that Myco infection had enhanced with MYCO treatment while Nitrogenase activity was enhanced with RIZB treatment for Faba bean plant grown under sandy soil and drip irrigation conditions.