The application of humic acid and nanocamposite superabsorbant on growth ‎characteristic and resistance to drought stress in turf grass

In order to investigate the effect of nanocomposite superabsorbent and humic acid on the characteristics of lawn sport, a factorial experiment based on a completely randomized design with three replications was carried out. The first factor was nanocomposite superabsorbent at three levels (0, 2 and 5 g/Kg in each pot), the second factor was humic acid at three levels (0, 250 and 500 mg/L, as spray) and the thirs factor was drought stress at two levels (50 and 100% field capacity). Results showed that the application of humic acid during drought stress improved color traits and aerial part hieght. Application of nanocomposite superabsorbent during drought stress reduced the effect of drought stress on color traits, leaf texture quality and aerial part hieght. The application of humic acid and nanocomposite superabsorbent simultaneously improved the density, shoot height, fresh weight, but reduced the ion leakage, proline and dry weight of turfgrass. In general, the results showed that the application of humic and nanocomposite superabsorbent acid could help the stress flow through the passage, and reduced the effect of stress on the plant.