Effect of humic acid on sprouting and rooting of stem cuttings of dalberiga sissoo roxb.

The present study was conducted at FRC, Mandar (Ranchi), Jharkhand to study effect of the humic acid on sprouting and behavior of Dalbergia sissoo. The extracted humic acid was acidic in nature and available N and P content was lower than commercial HA (Humicil). Branch cuttings were treated with different concentrations of extracted HA in different months and its responses were recorded. Both sprouting and rooting were varied significantly with time, position and humic acid concentrations. The 0.08% extracted HA shown highest sprouting and survival per cent during August and September whereas 0.02% HA produced maximum sprouts and survival percent during December month. The highest percentage of both sprout and survival of basal and terminal cuttings were found at 0.04% and 0.08% HA, respectively during February. Extracted HA promotes root growth and root nodule in the clonal seedlings at 0.06% HA. Shoot growth and biomass of clonal seedlings were augmented by HA at 0.08% HA.