تاثير مستويات السماد البوتاسي المضاف الى التربة ورش الحديد في نمو وحاصل الذرة الصفراء) Zea mays L.)

Abstract

Afield experiment was conducted in fall - 2009 at a private farm of Al-Azraqia village - Saqlawia district - Falluja city in Alluvial CL soil classified as Typic - torrifluvents . The aim of this experiment is to study the effect of addition of four levels of potassium fertilizer K2SO4 to the soil (0 , 75 , 150 , 225 kg K. ha-1 ) (41.5 % K) as a source of potassium and foliar application of FeSO4 . 7H2O (%20 Fe) as a source of iron in four concentrations (0 , 50 , 100 , 150 mg Fc . L-l ) in the growth and yield of corn (Zea mays L.) Research 106. Factorial experiment according to Randomized complete block design (R.C.B.D) was used in this study with three replicates. dry weight of biomass , yield of grain , and concentration of K , Fe in grain , and potassium in soil after planting were estimated and the results were as follow: The level k3 (225 kg K .ha-l ) achieved significant superiority in the mean of yield of grain , and yield of dry matter (7.93 and 9.12 t.ha-1 ) respectively. Also, the same level achieved a superiority in the concentration of potassium and iron in grains (0.69 % , 174.83 mg Fe .kg-1 dry matter) and for soil after harvesting (234.70 mg K. kg-1 dry soil) in comparing with other levels. The concentration Fe3 (150 mg Fe. L-1 ) was significant superior among other levels of spray by giving the best results of studied properties, yield of grain e and yield of dry matter (7.62 and 9.03 t. ha-1 ) respectively. The same level achieved superiority in potassium and iron in grains (0.66% , 179.31 mg Fe. Kg-1 dry matter) and soil after harvest (217.48 mg K, g-1 dry soil). The interaction for the treatment K3Fe3 (0.25 kg K, ha-1 + 150 mg Fe. L-1 ) was superior significantly on other interaction levels in means of yield of grains, and yield of dry matter (8.56 and 10.37 t. ha-1 ) respectively. Also, the same interaction recorded highest rate of potassium and iron in grains (0.81 % , 196.45 mg Fe. Kg-1 dry matter) and soil after harvest (247.72 mg K. kg-1 dry soil).