EFFECT OF FOLIAR MICRONUTRIENTS UNDER SOME BIOSTIMULANTS ON THE PRODUCTIVITY OF FABA BEAN (Vicia faba L.)

Document Type : Research articles.

Authors

Soil, Water and Environment, Res. Inst., Agricultural Research Center

Abstract

Two experimental trails were designed to quantify the response of
nodulation, growth and yield and its components of faba been plants as well
as nutrient content in seeds toward foliar spray twice of zinc (0.3% zinc
sulphate), iron (0.6% iron sulphate) and molybdenum (0.05% ammonium
molybdedate) under some bio-stimulants, i.e., inoculation with rhizobium
and 10 kg humic acid/feddan. The experiments were conducted at the Farm
of Sids Agricultural Research Station (ARC), Beni Swif Governorate, Egypt
during two successive seasons (2013/2014 and 2014/2015). Number and dry
weight of nodules/plant showed positive significant response to iron and
molybdenum applicationas well as rhizobia and humic acid treatments
comparing with control. The maximum values of these parameters were
produced in plots under the effect of molybdenum followed by iron
application in combined with bio-stimulants. Plant height, dry weight/plant,
number of pods/plant, number of seeds/pod and grain and straw yields were
recorded under the treatments of spraying 0.6% iron sulphate in combined
with rhizobia inoculation plus humic acid. Higher nitrogen or protein content
in seeds were produced under 0.3% zinc sulphate plus rhizobia inoculation
plus humic acid, while, Fe and Mo application did not affect nitrogen
content. Zinc or molybdenum applications decreased phosphorus content in
seeds, while, humic acid enhanced P content. Potassium content was affected
only by humic acid. Zn application inhibited Fe content and vice versa iron
application decreased zinc content in seeds. Added Zn, Fe, and Mo increased
their contents in seeds, respectively. Also, humic acid application improved
macro and micronutrients in faba bean seeds.


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