EFFECT OF HUMIC ACID SEED TREATMENT ON YIELD AND SOME YIELD CHARACTERISTIC OF CORN PLANT (Zea mays L. indentata)

This study was aimed to determination of seed treated humic acid effects to yield and some yield characteristics of corn plant ( Zea mays L. indentata ) as grown second crop conditions. Study was set up according to randomized complete blocks experimental design with 3 replicates under Harran Plain conditions in 2012, Sanliurfa, Turkey. Motril hybrid corn variety was used as a plant material. Humic acid seed treatments were 0 (control), %2.5, %5, %7.5, %10, and %12 humic acid concentrations. Humic acid concentrations were applied to corn seed before sowing. Some yield and yield characteristic of corn plant such as tassel flowering duration, plant height, leaf number per plant, grain weight of ear, thousand kernel weights and grain yield were evaluated in the study. As a result of research; statistical significant differences were seen among humic acid seed treatments at tassel flowering duration and leaf number per plant (P≤0.05). Also, humic acid seed treatments were significant at grain weight of ear, thousand kernel weights and grain yield (P≤0.01). Tassel flowering duration decreased with humic acid seed treatment whereas leaf number per plant, grain weight of ear, thousand kernel weights and grain yield values increased with humic acid seed treatment. The highest values were found in % 7.5 humic acid seed treatment.