تأثير التسميد البوتاسي في بعض الصفات النباتية للذرة الصفراء بوجود فطريات تعفن الجذور

الملخص EN

This study showed using potassium to fertilize corn planted in spring season results led to a reduction the infection of corn root rot fungi all corn cultivars under this study (Buhoth 106, Al Rabia, Sarah and Dania) inoculated with Fusarium avenaceum and fertilized with potassium as K2SO4 did not show any variations in plant height, while cultivars Al Rabia and Sarah inoculated with Bipolaris sorokiniana and non-fertilized corn plants showed reducing in plant height as the percentage of inhibition were 28,97 and 29,36%, respectively, while the Al Rabia and Dania cultivars inoculated with Helminthosporium sativum and non-fertilized plants were less height, Al Rabia cultivar inoculated with F,avenaceum and fertilizer with potassium showed less damage in leafs number but record an increase in the number of leafs while Sarah cultivar was most affected, fertili- zation effect on stem diameter, corn cultivars inoculated with F.avenaceum and H.sativum did not show no significant difference, while Sarah cultivar was most effected when it inoculated with B.sorokiniana with inhibition ratio of 34,80%, inoculation with F.avenaceum caused significant inhibition to ears number in Buhoth 106 and Sarah cultivar in fertilized an non fertilized corn plants most inhibition effect in shoot dry weight appeared in (Buhoth 106 cultivar inoculated with F.avenaceum and non non fertilized with potassium while the same cultivar showed less inhibition in root dry weight when inculcated with F.avenaceum and fertilized with potassium with inhibition ratio 27,35%.