تأثير الفطريات المذيبة للفوسفات في زيادة جاهزية الأسمدة الفوسفاتية في التربة

الملخص EN

A pot experiment was conducted to study the effect of phosphate dissolving fungi (PDF) in increasing the availability of phosphates fertility during growing season of 2002-2003.

Soils were inoculated with three isolates of PDE.

These isolates were.

Aspergillus candidus (F1), Trichoderma harzianum (F2), penicillium digitatum (F3).

Inoculated soils were treated with either super phosphate or rock phosphate (as source of phosphorus) at rate of 40 mg P/Kg soil.

Zea mays plants were planted in pots and treated with super phosphate and rock phosphate.

After 50 days the plants were harvested.

Plants were dried in oven at 70Co, then shoot dry weights were recorded.

Plants were ground and subsamples were digested.

Phosphorus concentration in plant samples were determined then phosphorus uptake was calculated.

Available P in soil was also measured.

Results showed that inoculation of soils with (PDF) significantly increased available P, dry weights and P uptake as compared to those of non inoculated plants.

However, significant differences among used PDF isolates were noticed and being highest for (F1) isolate.