Effect of organic and bio fertilizers (Azotobacter and phosphate solubilizing
bacteria) on production of potatoes and some soil properties was studied in
Tartous.
The experiment consisted of 4 treatments (control soil, soil+manure, soil+
bioferti
lizer and soil+manure+biofertilizer) each replicated four time, for 2004
and 2005 seasons.
Total N, available P, available K, and organic matter in soil were
determined.
Significant increases were observed in most of the inoculated and organic
fertilized treatments compared with the control. However, the treatment
(soil+manure+biofertilizer) was the best and showed significant increases in
potato yield compared with other treatments especially in the next season.
However, the second season was better in yield increase in all treatments
than the first seacon.
A field experiment was carried out during 2002 at Al-Husainea - Deer Al-
Zour to study the effect of PSB (Pseudomonas) or PSB combined with 50%,
25%, 100 % of the recommended phosphorus (P2O5) mineral fertilizer without
inoculation on cotton produ
ctivity, phosphate uptake .
Significant differences in available phosphate were noticed in comparison
with the control. These microorganisms were effective in solubilizing of fixing
phosphate in soil and fixing phosphate, added to the soil as superphosphate.
Significant increasing in cotton yield of inoculating treatments was noticed in
comparison with the control.