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. 2012 Oct 23;6(1):122.
doi: 10.1186/1752-153X-6-122.

Nutritive quality of romanian hemp varieties (Cannabis sativa L.) with special focus on oil and metal contents of seeds

Marcela Mihoc  1 , Georgeta Pop, Ersilia Alexa, Isidora Radulov
Affiliations

Nutritive quality of romanian hemp varieties (Cannabis sativa L.) with special focus on oil and metal contents of seeds

Marcela Mihoc et al. Chem Cent J. .

Abstract

Background: The study aims to determine the nutritional value of hemp seed expressed by the oil content and by the concentration of metals (Ca, Mg, K, Fe, Mn, Zn and Cd), for five varieties of monoecious and dioecious hemp seeds approved in Romania, comparative with the concentration of these metals in the soil.

Results: The content of oil in hempseed registers a slight decrease in the production records of 2011, losses due to drought and low levels of precipitation during the growth period. The greatest loss is found in Diana monoecious variety (26.54-20.82%) followed by Zenit varieties (27.37-22.97%), Armanca (29.27-25.32%), Silvana (28.89-25.04%) and Denise (26.96-25.30%). Siccative hemp oil has a yellowish green color and an iodine index of 140-156 g I2/100 g oil. Hemp seed are rich in mineral based Ca (144-955 mg/100 g seed), Mg (237-694 mg/100 g seed), K (463-2821 mg/100 g seed), Fe (1133-2400 mg.kg-1), Mn (63-110 mg.kg-1) and Zn (42-94 mg.kg-1). For the soil the following macroelements concentrations were determined: Ca (2100-2520 mg.kg-1), Mg (320-376 mg.kg-1) and K (232-257 mg.kg-1). Mn (156-197 mg.kg-1) and Zn (54-67 mg.kg-1) remain within normal limits for Romania. The soils in the experience area contain large amounts of Fe (19000-20430 mg.kg-1). The presence of K in large quantities determines the accumulation of large quantities of Fe in the soil.

Conclusion: Hempseed belonging to the five Romanian varieties are rich source of nutrients (Ca, Mg, K) and unsaturated oil easily digestible by the body, but the presence of Cd concentrations above the upper limit puts a question mark over the use of seeds in various food products. Hemp extracts easily certain metals from the soil. Significant amounts of Fe (1133-2400 mg.kg-1), Mn (63-110 mg.kg-1), Zn (42-94 mg.kg-1) and Cd (1.3-4.0 mg.kg-1) are found in hemp seeds. Hemp (Cannabis sativa L.) is included among plants suitable for phytoremediation of soil contaminated with cadmium, zinc and iron.

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Figures

Figure 1
Figure 1
Ca and Mg content in hempseed varieties under fertilization (b0, b1, b2) and seeding space (20cm, 50cm).
Figure 2
Figure 2
K content in hempseed varieties under fertilization (b0, b1, b2) and seeding space (20cm, 50cm).
Figure 3
Figure 3
Fe and Zn content in hempseed varieties under fertilization (b0, b1, b2) and seeding space (20cm, 50cm).
Figure 4
Figure 4
Mn content in hempseed varieties under fertilization (b0, b1, b2) and seeding space (20cm, 50cm).
Figure 5
Figure 5
Cd content in hempseed varieties under fertilization (b0,b1,b2) and seeding space (20cm, 50cm).
Figure 6
Figure 6
Map of experimental sites (processed after Banat Map) [40].
See this image and copyright information in PMC

References

    1. Mölleken H, Theimer RR. Survey of minor fatty acids inCannabis sativaL. fruits of various origins. Journal of the International Hemp Association. 1997;4(1):13–17.
    1. Vogl C. Comparing Hemp Seed Yields (Cannabis sativa L.) of an On-Farm Scientific Field Experiment to an On-Farm Agronomic Evaluation Under Organic Growing Conditions in Lower Austria. Journal of Industrial Hemp. 2004;9(1):37–49. doi: 10.1300/J237v09n01_05. - DOI
    1. Eriksson M. Hemp seed cake as a protein feed for growing cattle. Swedish University of Agricultural Sciences: Department of Animal Environment and health; 2007. (MSc thesis, student report 128).
    1. Deferne JL, Pate DW. Hemp seed oil: A source of valuable essential fatty acids. Journal of the International Hemp Association. 1996;3(1):4–7.
    1. Mediavilla V, Jonquera M, Schmid-Slembrouck I, Soldati A. A decimal code for growth stages of hemp(Cannabis sativa L.) Journal of the International Hemp Association. 1998;5(2):68–74.

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