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Fiber Hemp Biomass Yield and Quality on Shallow Stony Soil in Southwest Germany

Author

Listed:
  • Beatrice E. Greiner

    (Department of Biobased Resources in the Bioeconomy (340b), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany)

  • Jana Kunisch

    (Department of Biobased Resources in the Bioeconomy (340b), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany)

  • Galina Krauße

    (Department of Biobased Resources in the Bioeconomy (340b), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany)

  • Theresa Thiel

    (Department of Biobased Resources in the Bioeconomy (340b), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany)

  • Klaus Schwadorf

    (Core Facility Hohenheim, Analytical Chemistry Unit, 70599 Stuttgart, Germany)

  • Moritz von Cossel

    (Department of Biobased Resources in the Bioeconomy (340b), Institute of Crop Science, University of Hohenheim, 70599 Stuttgart, Germany)

Abstract

Shallow arable soils (<35 cm depth) are classified as marginal for common agriculture but may still support biomass production from industrial crops like fiber hemp, which has a low indirect land-use change risk. However, little is known about hemp’s performance under such conditions. Therefore, this study investigated the biomass yield and quality of fiber hemp and other crops on a shallow (<35 cm), stony (>15% stone content), and clay-rich (>50% clay content) soil at 800 m above sea level in Southwest Germany (2018–2021). A randomized field trial tested different row widths and nitrogen (N) fertilization levels to assess low-input options for the given type of marginal land. Across years and row widths, hemp achieved average grain dry matter (DM) yields of 1.3 Mg/ha at a fertilization rate of 40 kg N/ha and 1.6 Mg/ha at 120 kg N/ha (with on average 30.9 ± 1.4% crude fat content across treatments). The average stem DM yields accounted for 5.11 Mg/ha (40 kg N/ha) and 6.08 Mg/ha (120 kg N/ha), respectively. Reduced N fertilization (40 kg/ha) lowered DM yields by up to 16% compared to full fertilization (120 kg/ha), but the effect was not significant and weaker at wider row spacing (45 cm). Additionally, maize reached acceptable DM yields (>17 Mg/ha). These findings suggest that shallow soils classified as marginal require reassessment, as they may offer viable opportunities for sustainable industrial hemp cultivation and contribute to a bio-based economy.

Suggested Citation

  • Beatrice E. Greiner & Jana Kunisch & Galina Krauße & Theresa Thiel & Klaus Schwadorf & Moritz von Cossel, 2025. "Fiber Hemp Biomass Yield and Quality on Shallow Stony Soil in Southwest Germany," Land, MDPI, vol. 14(4), pages 1-36, March.
    • Handle: RePEc:gam:jlands:v:14:y:2025:i:4:p:720-:d:1622323
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    References listed on IDEAS

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