The Effect of leaves Feeding with Heomic Acid in Some Growth and Producing Properties of Sun Flower Plant. Helianthus annuus L

Abstract

A factorial experiment was applied according to Randomized Complete Block Design (R.C.B.D) with three replications, during the spring season 2017 in Diyala / Baquba / Buhriz city, using silt loam soil to study the effect of four levels of foliar fertilization with humic acid 0, 2, 4, 6 ml.L^-1 in the growth and yield of sunflower, Helianthus annuus  L. (LuLeo). The results showed significant differences for level of humic acid 6 ml.L^-1 in plant height which gave an average 213.73 cm, leaf area of the plant 5597.32 cm², chlorophyll index 48.64 SPAD, dry weight of the plant 215.0 g, number of seeds in the flowery disc 1494 seed.disc^-1, 1000 seeds weight 88.3 g, plant yield 127.91 g.plant^-1, total yield 6.81 ton.h^-1 and oil percentage in the seeds 43.184%, while the level 4 ml.L^-1 humic acid gave the highest average for the protein percentage in the seeds 18.34%.