The Effects of Humic Acid and Ammonium Sulfate Foliar Spraying and Their Interaction Effects on the Qualitative and Quantitative Yield of Native Garlic (Allium sativum L.)

In order to investigate the effects of ammonium sulfate and humic acid foliar spraying and their interaction effects on the yield and components yield of native garlic (Allium sativum L.), an experiment as a factorial form in a randomized complete block design in the farming year 2013-2014 was conducted. The considered treatments were included ammonium sulfate at four levels of zero (control), 100, 150 and 200 kg.ha-1 and humic acid at four levels zero (control), 1000, 2000 and 3000 mg.lit-1. According to the variance analyze results, ammonium sulfate and humic acid on the measured characteristics at one percent probable has significant effect, also the interaction, ammonium sulfate with humic acid at one percent probable on the clove number, chlorophyll and allicin at five percent probable on the leaves number and bulb yield ha significant effect but on the clove weight and essential oil percent has not significant effect. The obtained results of the mean comparison showed that the using of ammonium sulfate caused the increasing of yield and yield components except clove weight, so that the most positive effect was observed in the 150 kg per hectare of ammonium sulfate treatment, also the using of humic acid by increasing yield and yield components except the clove weight was observed and the 3000 mg.lit-1of humic acid treatment has the most measured characteristics amounts.