Investigation of hemp (Cannabis sativa L.) crop weediness

Zofija Jankauskienė, Elvyra Gruzdevienė, Natalija Burbulis, Ernestas Maumevičius, Iryna M. Layko

Abstract


The investigation of hemp crop weediness was carried out at the Upytė Experimental Station of the Lithuanian Research Centre for Agriculture and Forestry in 2014. Bi-factorial trial was carried out: Factor A – variety (A1 – USO 31; A2 – Bialobrzeskie); Factor B – sowing rate (B1 – 45 kg ha-1; B2 – 70 kg ha-1). Data showed that seed rate had a significant influence on crop density at full hemp emergence as well as at harvesting time. Rainy vegetation period was favourable not only for hemp growing, but for weeds as well. Crop density (resulted by seed rate) had a significant influence on crop weediness – significantly more weeds (in average 166 plants m-2) were found in the plots with seed rate of 45 kg ha-1, consequently at lower crop density, and under 140 weed plants m-2 were found in the plots with seed rate of 70 kg ha-1, consequently at higher crop density. Hemp crop weediness at harvesting time was much lower than that at the beginning of vegetation; reduction of weediness over the vegetation period was close to 87-90 percent.

Keywords


Cannabis sativa L.; crop density; seed rate; variety; weediness

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References


I. Bocsa and M. Karus, “Hemp cultivation” in: The cultivation of hemp: botany, varieties, cultivation and harvesting. Sebastopol, USA, 1998, 186 p.

V. Mediavilla, M. Jonquera, I. Schmid-Slembrouck, and A. Soldati, “Decimal code for growth stages of hemp (Cannabis sativa L.)”, Journal of the international hemp association, vol. 5, no. 2, pp. 65, 68-74, 1998.

Z. Jankauskienė and E. Gruzdevienė, “Evaluation of Cannabis sativa cultivars in Lithuania”. Zemdirbyste-Agriculture, vol. 97, no. 3, pp. 87-96, 2010.

L. Poiša and A. Adamovičs, “Hemp (Cannabis sativa L.) as an Environmentally Friendly Energyplant”. Scientific Journal of Riga Technical University. Environmental and Climate Technologies, 5, pp. 80-85, 2010.

M. S. U. Rehman, N. Rashid, A. Saif, T. Mahmood and J.-I. Han, “Renewable and Sustainable Energy Reviews”. Renewable and Sustainable Energy Reviews, vol. 18, pp. 154–164, 2013.

H. Burczyk, L. Grabowska, M. Strybe and W. Konczewicz, “Effect of sowing density and date of harvest on yields of industrial hemp”. Journal of Natural Fibers, vol. 6, pp. 204-218, 2009.

J. Hall, S. P. Bhattarai and D. J. Midmore, “Effect of industrial hemp (Cannabis sativa L) planting density on weed suppression, crop growth, physiological responses, and fibre yield in the subtropics”, Renewable Bioresources, 2014. [Online]. Available: http://dx.doi.org/10.7243/2052-6237-2-1, [Accessed Feb 12, 2015].

Hemp Factsheet. 2007. [Online]. Available: http://www.hemp-sisters.com/Information/factsheet.htm [Accessed: Feb. 14, 2014].

H. M. G. Van der Werf, W. C. A. van Geel and M. Wijlhuizen, “Agronomic research on hemp (Cannabis sativa L.) in the Netherlands, 1987–1993”. Journal of the International Hemp Association, vol. 2, no. 1, pp. 14-17, 1995.

Weed control. Manitoba Agriculture, Food and Rural Initiatives [Online]. Available: http://www.gov.mb.ca/agriculture/crops/hemp/bko05s05.html. [Accessed: Feb. 13, 2014].

Hemp agronomy 101. [Online]. Available: http://www.votehemp.com/PDF/HempAgronomy101version2006. [Accessed: Feb. 14, 2014].

T. Prade, “Industrial Hemp (Cannabis sativa L.) – a High-Yielding Energy Crop”, Doctoral Thesis, Swedish University of Agricultural Sciences Alnarp, 93 p., 2011.

P. I. Peev, “Is industrial hemp a sustainable construction material?” , Bachelor of Architectural Technology and Construction Management, Via University College, Horsens, Denmark, 36 p., 2012.

T. Reeves, Hemp: an agricutural super-crop held hostage. 16 p., 2012.

P. C. Struik, S. Amaducci, M. J. Bullard, N. C. Stutterheim, G. Venturi and H. T. H. Cromack, “Agronomy of fibre hemp (Cannabis sativa L.) in Europe”, Industrial Crops and Products, vol.11, pp. 107–118, 2000.

B. Sipos, E. Kreuger, S.-E. Svensson, K. Reczey, L. Bjornsson and G. Zacchi, “Steam pretreatment of dry and ensiled industrial hemp for ethanol production”. Biomass and Bioenergy, vol. 34, no 12, pp. 1721-1731, 2010. DOI:10.1016/j.biombioe.2010.07.003

K. Pudełko, L. Majchrzak and D. Narożna, “Allelopathic effect of fibre hemp (Cannabis sativa L.) on monocot and dicot plant species”, Industrial Crops and Products, vol. 56, pp. 191–199, 2014.

V. V. Buivydaitė, M. Vaičys, J. Juodis and A. Motuzas, Lietuvos dirvožemių klasifikacija. Vilnius, p. 76, 2001.

P. Tarakanovas and S. Raudonius, Agronominių tyrimų duomenų statistinė analizė taikant kompiuterines programas ANOVA, STAT, SPLIT-PLOT iš paketo SELEKCIJA ir IRRISTAT. Akademija, Kauno r. 58 p., 2003.

Z. Jankauskienė, E. Gruzdevienė and S. Lazauskas, “Potential of industrial hemp (Cannabis sativa L.) genotypes to suppress weeds”, Zemdirbyste-Agriculture, vol. 101, no. 3, pp. 265-270, 2014.




DOI: http://dx.doi.org/10.17770/etr2015vol2.272

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