تأثير المدد بين الريات و مستويات البوتاسيوم في الحاصل و بعض مكوناته لنبات الذرة الصفراء

الملخص EN

To study the effect of irrigation periods ( irrigation each 5, 10 and 15) days , (T1 , T2 and T3) respectively and Potassium levels (0 , 120 and 240) kg ha-1 , (K0 , K1 and K2) kg ha-1 respectively on yield some and yield components of corn (Zea mays L.) .

Field experiment was conducted in the Field crops production department .College of Agriculture – University of Baghdad , in the Autumn season 2013 in silty clay loam soil texture .

Randomized Complete Block Design (RCBD) was used with three replications .

120 kg ha-1 P fertilizer added at sowing time .

240 kg N ha-1 of urea added at three stage of plant growth (vegetative , inflorescences and at tasseling stage ).

Water requirement of plant 675 mm .

Plants were irrigated after calculating quantities of water for every treatment .

Plants were harvested at maturity stage , the result showed that : The impact of irrigation after 10 and 15 days (T2 and T3) significantly effect in reducing biological yield , oven dry weight of crop and weight of 500 grain .

compared to (T1) treatment which produced biological yield , oven dry weight , weight of 500 grain and grain yield were 5112 kg ha-1 , 359 kg ha-1 , 163 gm and 4753 kg ha-1 respectively .

Potassium levels were significantly effect for increasing biological yield , oven dry weight , weight of 500 grain and grain yield were 5552 kg ha-1 , 401 kg ha-1 , 182 gm and 5150 kg ha-1 respectivly .

interaction was significantly effect in increasing all above parameters.