The study examined the effects of different amounts of humic acid and response curves in the Dactylis glomerata

The effect of acid on the vegetative growth humic acide Dactylis glomerata pasture species in 89 years as a greenhouse experiment was conducted in Damavand city humic acide granular fertilizer to the value of 0, 75, 150 and 225 kg per hectare was used. Traits studied were above the surface of the first leaf (cm), length from collar to the plant’s largest leaf (cm), fresh and dry weight of leaves, roots, stems and aerial parts (in grams), leaf (cm square), root length (cm), number of leaves, the shoot to root collar diameter in millimeters. Chlorophyll a, b, total, rwc, sal and wsd.The identified traits affect shoot dry weight and the effect of values humic acide on these traits, on the basis of ss or curves on the amount of 150 kg humic acide ha makes the most of these traits is and the weight of dry air also increases.