پديد آورندگان :
Aref Elham M نويسنده , Azza A. M نويسنده , Abd El-All Kh. A نويسنده , Shaban H نويسنده , El-Shahat R. M نويسنده
چكيده لاتين :
EFFECT OF Azolla AND CYANOBACTERIA AS BIOFERTLIZER ON BARLEY CULTIVATED IN SALINE SOIL ABSTRACT
Both the nitrogen fixing, plant growth promoting Azolla pinnata and a mixture
of two cyanobacteria strains viz. Nostoc muscorum and Anabaena oryzae commonly
used in rice cultivation were applied in a field trial for barely. The experiment was
conducted at South El- Hossinia Res. farm Station, El-Sharkia Governorate, Agric.
Res. Center (ARC), Egypt, at the winter season of 2007/08. The trial was to study the
effect of Azolla (fresh, dry and as extract as foliar spray) and cyanobacteria as
suspension for seed soaking and filtrate for spray treatments as well as urea
(46.5%N) as nitrogen fertilizer on growth, yield and yield components of barley
(Hordum vulgare) cultivated in saline soil (EC: 23.5 dSm-1). Also, to study their effect
on some soil characteristics (chemical properties and biological activity). Results
revealed that the highest organic matter per cent was due to the use of dry Azolla
(1.35) (T3). All tested biofertilizer treatments decreased both EC and pH compared to
the control treatment. Foliar spray by both Azolla and cyanobacteria as foliar spray
plus 100% N as urea (T9) gave the highest soil available N, P and K values. The
treatment (T9) of A. pinnata and cyanobacteria applied as foliar spray gave also the
highest values of all soil biological activity parameters. Results also exhibited a
favorite influence of foliar application for both Azolla and cyanobacteria (T9), since it
gave significantly higher barely yield, yield components and N,P and K contents of
both grains and straw compared to the other biofertilizer treatments and control
(100% N). However, based on the present study it may be of beneficial to use Azolla
and cyanobacteria as foliar spray plus mineral N fertilizer for barley plants.
