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Open AccessArticle

Soil Fertilization with Urea Has Little Effect on Seed Quality but Reduces Soil N2O Emissions from a Hemp Cultivation

1
Research Division Portici, Institute of Biosciences and Bioresources (IBBR), National Research Council of Italy (CNR), Via Università 133, 80055 Portici, Naples, Italy
2
Institute of Food Sciences (ISA), National Research Council of Italy (CNR), Via Roma 64, 83100 Avellino, Italy
3
Institute for Animal Production System in Mediterranean Environment (ISPAAM), National Research Council of Italy (CNR), Via Argine 1085, 80147 Naples, Italy
4
Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), National Research Council of Italy (CNR), Via Patacca 85, 80056 Ercolano, Naples, Italy
5
Department of Chemistry and Biology “Adolfo Zambelli” (DCB), University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy
*
Author to whom correspondence should be addressed.
The authors equally contributed to this work.
Agriculture 2020, 10(6), 240; https://doi.org/10.3390/agriculture10060240
Received: 12 May 2020 / Revised: 17 June 2020 / Accepted: 18 June 2020 / Published: 19 June 2020
Multipurpose production of hemp has led to renewed interest for this crop cultivation, especially for human nutrition. To date, no information about the influence of nitrogen source on hemp seed quality is available. Hemp is also used for food and beverages due to its nutritional characteristics. This further use of hemp has led to an increase in hemp-grown areas. Therefore, it is important to get more information on the role of nitrogen on the quality production as well as to evaluate the environmental impact of the cultivation technique. In this work, we evaluate the influence of nitrogen source (i.e., NH4NO3 and urea) on the seed fatty acid composition of an edible hemp as well as on the environment in terms of soil N2O emission. Nitrogen source modified seed quality very little. Even if characterized by a lower acidic profile, seed from plants grown under urea and NH4NO3 had a ω-3/ω-6 ratio (0.3) within the optimal range from the nutritional standpoint, being considered as the optimal proportion for human metabolism and health. Urea fertilization reduced soil N2O emission. Our findings suggest that nitrogen source seems not to influence seed quality and that urea fertilizer might be more climate-friendly than NH4NO3 in terms of greenhouse gas emissions, in an extensive cultivation of hemp for industrial use. View Full-Text
Keywords: soil nitrogen fertilization; fatty acid profile; N2O emission; Cannabis sativa L. soil nitrogen fertilization; fatty acid profile; N2O emission; Cannabis sativa L.
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Tedeschi, A.; Volpe, M.G.; Polimeno, F.; Siano, F.; Maglione, G.; Di Tommasi, P.; Vasca, E.; Magliulo, V.; Vitale, L. Soil Fertilization with Urea Has Little Effect on Seed Quality but Reduces Soil N2O Emissions from a Hemp Cultivation. Agriculture 2020, 10, 240.

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