The Effects of Irrigation, Topping, and Interrow Spacing on the Yield and Quality of Hemp (Cannabis sativa L.) Fibers in Temperate Climatic Conditions

The study was aimed at determining the most suitable irrigation schedule program for hemp grown fibers by using evaporation from free water surface (Eo), measured a Class A pan and related crop plant coefficient (Kc). experiment, carried out in Vojvodina, northern part of Republic Serbia, included three regimes: I1, I2, I3 corresponding, respectively, to daily an open two interrow spacings: RS1 (12.5 cm) RS2 (25 cm), topped (T) not (NT) variants. Kc values used calculation evapotranspiration (ETd) were 0.42 April May 1.00 (I1), 0.80 (I2), 0.60 (I3) June harvest. In addition, nonirrigated (Io) control variant also trial. dioecious fiber variety Marina trials. Irrigation drip system scheduled based on budget method. It started when readily available (RAW) soil layer 0.4 m completely depleted plants. first year study, did influence yield fiber, but second one, best result achieved I1. Interrow spacing have statistically significant effect both quality. topping plants significantly decreased hemp, it is recommended cultivated fibers. quality influenced irrigation, inter-row spacing, topping. rate interval 312 mm (ETa) 520 (ETm). highest IWUE ETWUE years bark detected variant, which suggested that (Kc) 0.6 could be correction Eo August. response factor (Ky) with 0.22 total growing season reveals that, rainy years, production without temperate climate Vojvodina region. However, such are rare. Without doubt, mentioned region order obtain high yields good product.