التأثير الفسلجي لمصادر الأسمدة النتروجينية و مضادات النتج في بعض الصفات النوعية و تركيز النترات في درنات البطاطا

Abstract EN

This study was conducted in experimental field, department of horticulture, college of agriculture –university of Baghdad, in Abo Graib area for two seasons of spring for years 2011, 2012 for potatoes yield.

This study was included the effect of using three types of nitrogen fertilizer, as well as the control treatment ( Zero) , and two anti- transpiration , as well as to control treatment ( Zero).

This study was made by using factorial experiences (4*3) within RCBD design and three replications, that would give 36 experimental units after field and laboratory study indicators had completed, the means were compared for calculating less significant difference L.S.D.

at probability level of 5% by using SAS program of in the statistics analysis.

The results were summarized which follow: The interaction treatment of N3AS0 caused a significant increase in the quality indicators for the tubercles , when it gave highest rate for the dry matter of the tubercles in the first season which (46.2%) and highest rate for the solid matters T.S.S.

for two seasons which ( 3.50 ,and 4.08%) respectively and highest solid degree for two seasons which (10.3 , and 11.5 lcg\cm2) respectively, while the treatment N2AS1 was significantly higher in percentage the dry matter in the second season which ( 38.7%)