Tag Archives: Cannabis sativa

641–649 A. Adamovics, S. Ivanovs and V. Stramkale
Investigations about the impact of norms of the fertilisers and cultivars upon the crop capacity biomass of industrial hemp
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Investigations about the impact of norms of the fertilisers and cultivars upon the crop capacity biomass of industrial hemp

A. Adamovics, S. Ivanovs* and V. Stramkale

Latvia University of Agriculture, Liela iela 2, LV 3001 Jelgava, Latvia
*Correspondence: semjons@apollo.lv

Abstract:

Field trials were carried out in 2012–2014, on the Research and Study Farm ‘Pēterlauki’ of the Latvia University of Agriculture. Eleven sorts of industrial hemp (Cannabis sativa L.) – ‘Bialobrzeskie’, ‘Futura 75’, ‘Fedora 17’, ‘Santhica 27’, ‘Beniko’, ‘Ferimon’, ‘Felina 32’, ‘Epsilon 68’, ‘Tygra’, ‘Wojko’ and ‘Uso 31’ were sown in a sod calcareous soil (pHKCl 6.7, P 52 mg kg-1, K 128 mg kg-1, the organic matter content 21–25 g kg-1). The total seeding rate was 50 kg ha-1. The plots were fertilised as follows: N-120, P2O5– 90, K2O- 150 kg ha-1. Hemp was sown in the middle of May, in 10 m2 plots, triplicate. Hemp was harvested when the first matured seeds appeared. The biometrical indices, the height and stem diameter, the harvesting time, the amount of fresh and dry biomass and the fibre content were evaluated.
Yield of dry matter on average comprised 15.06 t ha-1, depending on the cultivars. Cultivation year and cultivar notably affected hemp biomass yield. In 2012, the highest yield of dry biomass was produced from cultivars ‘Futura 75’ (21.33 t ha-1) and ‘Tygra’ (20.87 t ha-1), the lowest – from ‘Bialobrzeskie’ (11.95 t ha-1). Significantly higher average yield of dry biomass was obtained from cultivars ‘Futura 75’ (17.76 t ha-1), ‘Tygra’ (16.31 t ha-1), ‘Wojko’ (15.51 t ha-1) and ‘Epsilon 68’ (15.28 t ha-1), the lowest – ‘Bialobrzeskie’ and ‘Uso 31’ (13.53 t ha-1). Meteorological conditions influenced the dry biomass yield.
The aim of this study was find productive cultivar of industrial hemp (Cannabis sativa L.) and clarify nitrogen fertiliser rates impact for biomass production in Latvia.

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