عملكرد سرشاخه گلدار و ميزان هيپريسين گل راعي تحت سطوح آبياري

Dry matter yield and Hypericin amount of Hypericum perforatum under irrigation levels

Because Hypericum perforatum L. distributes in altitude 0 - 2000 m from sea level in Golestan province, this project was performed to introduce the suitable cultivar with the highest amount of effective material. This study was conducted on the cultivars yield of Hypericum perforatum L. at the Chalki Research Station from 1380-1384. Experiment was carried out as split plot based on Randomized Complete Block design with three replications. Treatments included: Furrow-irrigatation as main plot from April to September based on 0, -0.3, -5 and -15 Mpa. Based on Wilting point that was determinated by means of TDR, and Cultivars: two improved (NLC and TOPAZ) and two ecotypes collected from Golestan province as sub plots. The timing of irrigation was determined by TDR apparatus. The aerial parts of plants (20-25 cm from the top) were harvested during the flowering stage for determining of dry matter yield. Dry matter yield was significant different between cultivars (p<0.01) and in irrigation levels (p<0.01). Hypericin amount was not significant different between cultivars but was significant different in irrigation levels (p<0.05). Dry matter yield were higher in Topaz, and local Narrow leaf and Broad leaf Cultivars than NLC , 64.6%,49.4% and 37.1%, respectively.