Abstract
A study was done in one of Ramadi fields , AL-Anbar province in the spring season of 2005. The aim was to study the effect of addition chemical and organic fertilizers on the infection ratio of cucumber with root rot caused by the fungus (Pythium aphanidermatium) and some other traits . Results showed that replication (NPK) for three addition led to decrease infection ratio significantly to low level was ( 15% ), decreasing infection ratio resulted in significantly elevation in yield to high level ( 7.6 t/d ) , while the infection ratio increasing significantly to high level ( 45% ) in control treatment, this elevation in infection ratio resulted in reducing yield significantly to low level ( 3.2 t/d ) . Infection ratio was increased to ( 34 % ) when ( Urea ) was added, this elevation in infection ratio resulted in reducing yield significantly ( 3.1 t/d ) .While, a significant effect was found for ( NPK ) and ( Urea ) additions interaction in reducing the infection ratios which were ( 28 and 16 % ) for once and twice additions, respectively ; The decrease in infection ratio led to elevate yield significantly ( 4.8 and 6.5 t/d , respectively ) . The addition of organic fertilizer ( Poultry waste ) above soil surface before planting led to a significant reduction in infection ratio which was ( 10 % ). As a result , yield significantly increased to ( 6.8 t/d ) .The control ( no addition ) showed higher infection ratio ( 45 % ) and lower yield ( 3.2 t/d ) . The interaction of ( NPK and organic fertilizers ) revealed a significant reduction in infection ratio ( 8 % ) and a significant increase in yield ( 7.4 t/d ). For the replication of ( NPK and organic fertilizers ) addition , the interaction of their addition twice time led to a significant reduction in infection ratio ( 19 % ). As a result, yield was significantly increased to ( 6.9 t/d ). The control showed an elevation in infection ratio ( 45 % ) and a significant reduction in yield ( 2.5 t/d ) .
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