التأثير المتداخل للإجهاد المائي و البوتاسيوم و الرايزوبكترين في إعداد الخلايا البكتيرية في رايزوسفير نبات الحنطة

Abstract EN

Pots experiment was conducted in green house-Soil Science-College of Agriculture- University of Baghdad, at winter season 2010, to study the interactive effect of three water stresses ( 50, 70 and 90% ) of the available water , potassium fertilizer addition and without potassium, inoculation seed with Rhizobacteren and without inoculation on cells number of bacteria at rhizosphere of wheat root, at vegetative and tellaring stages of plant growth.

Randomized complete block design ( RCBD ) was used with three replicates.

The results showed that : The lower water stress increased bacterial cells number of Rhizobacter significantly at percent of 43.2 and 58.9% at vegetative and tellaring stages of plant growth respectively.

While the same stress increased significantly number cells of Azospirillum at percentage of 31.5 and 25.6% at the same stages of plant growth respectively compared with high stress.

Potassium fertilizer addition significantly increased cells number of both bacterial genus at the same stages.

There were no cells observed ( not detectable cells ) without inoculation seed by Rhizobacterene.