تأثير الصنف و الرش بحامض الهيومك في نمو و إنتاجية محصول الذرة الصفراء (Zea mays L.)‎

الملخص EN

A field experiment was carried out during the autumn season of 2016 in Al-Nile area, located 8 km north-east of Hilla city,Babylon for the purpose of study the effect of the varity and the spray with humic acid in the growth and productivity of corn Zea mays L.

The experimental design included the first three synthetic varieties of corn namely Fajr1, EL-Maha, Baghdad3, and the second factor was spraying concentrations of 0.5, 1.0, and 2.0 gm.L-1, respectively as well as the treatment of spraying with distilled water only Control.

The treatments were distributed in a Factorial Experiment according to the Randomized Complete Block Design (RCBD) with three replicates.

The obtained results showed that Fajr1 and spray with a concentration of 2.0 gm.L-1 of Humic acid were superior and the interaction between them, gave the highest average height of the plant, total number of leaves, leaves area , leaves area index, leaf content of total chlorophyll, number of ear per plant, number of grains per aer, weight of 500 grains, Biologecal Yield and grain productivity,With 148.01 cm2 ,16.95 Leavs.Plants-1, 525.59 cm2, 4.75, SPAD 51.61, 1.59 Aer.plant-1, 572.54 grains.Aer-1, 143.51 gm, 24.25 tons.hectare-1 and 11.61 tons.

hectare-1 on the sequence compared with the lowest average of those characteristics of AL-Maha varity which was 136.20 cm2 and 16.02 Leavs.Plants-1, 499.71 cm2, 4.27, SPAD 47.17 , 1.32 Aer.plant-1, 564.65 grains.Aer-1, 139.28 gm , 20.94 tons.

hectare-1 and 9.29 tons.

hectare-1 on the sequence we conclude from the results of this study that a positive effect of the variety and spraying of humic acid in increasing the growth characteristics and yield of maize crop.