Response of Some Timber Tree Seedlings Grown in Calcareous Soil to Mycorrhizal and Phosphate Dissolving Bacteria Inoculation
Abstract: The present investigation was carried out at the experimental farm of Horticulture Research Station
of El-Kanater El-Khayria, Qaluobeia Governorate, Egypt, along two successive years (30 months starting from
March 2018 to August 2020), aimed to study the effects of Vesicular-arbuscular mycorrhiza (VAM) and the
calcareous soil. Results showed significant increases in all seedling growth parameters (seedling height, stem
diameter, root length and fresh weight of shoots and roots) compared with un-inoculated seedlings. Also,
growth parameters showed superiority for co-inoculation with VAM+B.M or with B.P compared to other
treatments. Inoculation increased total chlorophyll content in leaves and carbohydrate percentages in stems
compared to un-inoculated seedlings of all studied tree species. Also, results revealed increments in N, P and
K % in leaves of inoculated seedlings with superiority to VAM + B.M and VAM+M.P. On the other hand, the
results showed that mycorrhiza and phosphoate dissolving bacteria treatments improved soil properties as it
decreased pH and EC and increased organic matter (O.M.), beside increasing N, P and K availability forms
with plant roots in a host-nonspecific manner. Seven
Bowen and Rovira [2] classified the soil microorganisms types of mycorrhizae have been known i.e. arbuscular,
into categories in relation to their effects on plant growth, ecto, arbutoid, ectendo, ericoid, monotropoid and
negatives (detrimental): such as root pathogens, sub orchidaceous mycorrhizae. Out of these, arbuscular and
clinical pathogens; neutral rhizobacteria, cyanide ectomycorrhizae are the most abundant and wide spread.
producers and positives (beneficial): such as rhizobia, They promote plant growth by enhancing nutrient
mycorrhizae; antagonists (biocontrol) hormone producers, acquisition and promoting growth hormones. They also
plant growth promoting bacteria. It’s well known that the increase the resistance in plants against plant pathogens
depending on the type of microorganisms, plant species,
and environmental conditions[1]. From this point of view
seedlings of Swietenia macrophylla King, Albizzia lebbeck (L.) Benth. and Dalbergia sissoo Roxb grown in
lebbeck Dalbergia sissoo Calcareous soil
of limited P, microbes aid in mitigating P uses and
phosphate dissolving bacteria Bacillus megatherium (B.M.) and Bacillus polymexa (B.P.) inoculation on
especially P, which changed from insoluble to soluble form
URL
Publication year 2021
Pages 123-132
Organization Name
serial title World Journal of Agricultural Sciences
Author(s) from ARC
Publication Type Journal
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