تأثير التلقيح ببكتريا الازوتوباكتر و مستويات مختلفة من السماد النتروجيني في 1- صفات النمو الخضري لنبات البطاطا (Solanum tuberosum L.)‎

Abstract EN

The study was conducted at Research field /Agriculture Research Station, Zakho, North of Iraq during spring 2005 and 2006 growing seasons to investigate the effect of inoculation with Azotobacter chroococcum (+,-) and varying levels of nitrogen fertilizer Urea 46% N ( 0, 100, 200 kg/hat.) on vegetative growth characteristic of potato plant Solanum tuberosum L.

cv.

Desiree , a factorial randomized complete block design (F.RCBD) was selected for the experimental with three replicates .

The results showed that there was significant increase in all vegetative growth characteristic ( plant height , the number of stem , leave area/plant , total chlorophyll , the % of nutrition N, P, K, Ca, ) as a result for inoculation with Azotobacter , also for adding nitrogen fertilizer and for two growing seasons .

The interaction treatment between inoculation with Azotobacter and adding nitrogen fertilizer at 200 kg/hac.

gave the highest results in vegetative growth and for two growing seasons .