BNF (Biological Nitrogen Fixation) Giessen
This experiment has been added by the GLTEN Curators using existing published sources.
- Local identifier
- BSG (Biologische Stickstoff-Gewinnung)
- Years operational
- 1982—
- Objective
- Effect of pre-crop and mineral fertilizers on yield and soil profile
- Data Access Statement
- Don't know
- Data license
- Don't know
- Data policy
- Don't know
- Organization
- Justus Liebig University, Giessen
- Person
- Markus KolmerTechnician
Site: BNF (Biological Nitrogen Fixation) Giessen
- Type
- research station field
- Local code
- BSG (Biologische Stickstoff-Gewinnung)
- Location
- Weilburger GrenzeGiessenGermany
- Geographic location
- 50.605285, 8.667577
- Elevation
- 158 Metres
- Visits permitted?
- No
- Soil type
- Eutric Fluvic Gleyic Cambisol (IUSS Working Group WRB 2015)
- Soil description
- silty clay texture
- Soil properties
Variable Depth Value (range) Units Ref year Estimated? Baseline? clay content 0 – 30 Centimetres (39 – 49) Percent silt content 0 – 30 Centimetres (40 – 58) Percent sand content 0 – 30 Centimetres (4 – 12) Percent usable field capacity 0 – 100 Centimetres 123 millimeter soil organic carbon 0 – 30 Centimetres (0.7 – 1.6) soil density 0 – 30 Centimetres (1.2 – 1.3) gram per cubic centimetre soil pH 0 – 30 Centimetres (6 – 6.4) soil potassium (4 – 15) mg/100g soil soil phosphorous (4 – 18) mg/100g soil soil magnesium (9 – 28) mg/100g soil - Climate properties
Variable Time period Value (range) Units mean air temperature 1982 – 2020 9.8 degree Celsius mean precipitation 1982 – 2020 672 millimeter
Design period: Current design period (1982—)
- Design Type
- Randomized complete block design
- Design description
- the field experiment includes two main factors (A) rotation crops (pre-crop/land use) and (B) mineral fertilization (N, P, K) arranged as a randomized block design with four field replications. The four years rotational crop sequence is as follows: first year: five different pre-crops/land uses arranged parallel to each other in the same field including crimson clover (CC) (Trifolium incarnatum used as green mulch, field bean (FB) (Vicia faba), summer oat (O) (Avena sativa), maize (M) (Zea maize) and fallow (F), followed by wheat in the 2nd year, rye in the 3rd year and barley in the 4th year. Mineral fertilization to winter wheat, winter rye and summer barley includes four sub-treatments: (1) zero NPK, (2) only PK 50%, (3) PK 100%+N 50% dosage (90, 60 and 60 kg N/ha for wheat, rye and barley, respectively) and (4) PK+N 100% dosage (180, 120 and 90 kg N/ha for wheat, rye and barley, respectively). The plots cover a gross size at sowing of 80 m2 and at harvesting a net plot size of 42 m2. The LTE includes 20 treatments (5 pre-crops x 4 NPK fertilisations) and 80 plots.
- Number of plots
- 80
- Number of harvests per year
- 1
- Crops
Crop Years grown wheat rye barley maize fallow crimson clover faba beans oats - Crop Rotations
- Fallow
- 1fallow
- 2wheat
- 3rye
- 4barley
Green mulch- 1crimson cloverincorporated as green mulch
- 2wheat
- 3rye
- 4barley
Faba bean- 1faba beansstraw residues incorporated 3 weeks after harvesting
- 2wheat
- 3rye
- 4barley
Oat- 1oatsstraw residues incorporated 3 weeks after harvesting
- 2wheat
- 3rye
- 4barley
Maize- 1maizestraw residues incorporated 3 weeks after harvesting
- 2wheat
- 3rye
- 4barley
- Factor
- Factor name
- Factor levels
- chemical fertilizer exposure
1. zero NPK
2. only PK 50%
P 45 kg/ha and K 60kg/ha3. PK 100% + N 50%
P 90 kg/ha and 90, 60 & 60 kg N/ha for wheat, rye and barley, respectively4. PK+N 100% dosage
P 90 kg/ha and 180, 120 & 90 kg N/ha for wheat, rye and barley, respectively
Related publications
- LTE “BSG” (Biologische Stickstoff-Gewinnung/Biological Nitrogen Fixation)
- Decoupling of subsoil carbon and nitrogen dynamics after long-term crop rotation and fertilization (2018) Hobley et al. Agriculture, Ecosystems and Environment 265: 363-373 10.1016/j.agee.2018.06.021 [In English]