Long-term experiment Dikopshof

This experiment has been added by the GLTEN Curators using existing published sources.
Objective
The Dikopshof was established as a classical deficiency experiment.
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Organization
Institute of Crop Science and Resource Conservation, Bonn University
research organisation
Person
Dr Hubert Hüging
principal investigator
Bonn University
Institute of Crop Science and Resource Conservation

Site: Experiment site

Type
research station field
Location
Wesseling
North Rhine-Westphalia
Germany
Geographic location
50.807934, 6.953046
© OpenStreetMap contributors
Elevation
62 Metres
Visits permitted?
No
Soil type
luvisol
Soil description
The soil is a humous, fine sandy loam developed from a 1 m loess layer and is highly fertile.
Climatic type
temperate oceanic climate
Climate properties
VariableTime periodValue (range)Units
air temperature 1950 – 2010 10 degree Celsius
precipitation 1950 – 2010 633 millimeter

Design period: (1904—)

Design description
The experiment consisted of five blocks, each one containing one crop and 24 treatments. Blocks are subdivided in 24 different unreplicated fertilization treatments measuring 18.5 × 15 m. From 1904 until 2009 the experiment was fully phased, since then only one crop per year has been grown, but the rotation sequence has been maintained. The fertilizer treatment factors for this LTE are complex and summarised in Rueda-Ayala et al (2018). N, P, K, and Ca were applied in combinations of synthetic fertilizers and organic manures. Amounts of fertilizer applied varied with different crops in the rotation.
Number of plots
120
Crops
CropYears grown
winter wheat
clover
potatoes
oats
sugar beet
winter rye
Crop Rotations
Cl-O-SB-WW-WR  1904—1950
  • 1
    clover
  • 2
    oats
  • 3
    sugar beet
  • 4
    winter wheat
  • 5
    winter rye
Cl-P-SB-WW-WR  1951—2009
  • 1
    clover
  • 2
    potatoes
  • 3
    sugar beet
  • 4
    winter wheat
  • 5
    winter rye
Cl-P-SB-WW-WR  2010—
  • 1
    clover
  • 2
    potatoes
  • 3
    sugar beet
  • 4
    winter wheat
  • 5
    winter rye
Factors
Factor name
Factor levels
fertilizer exposure
Factor describes different combinations of sources of fertilizer
organic fertilizer
Chemical form: farmyard manure
inorganic fertilizers
synthetic fertilizer
supplementary inorganic fertilizers
nitrogen fertilizer exposure
phosphate fertilizer exposure
potassium fertilizer exposure
calcium nutrient exposure
Measurement
VariableMaterialUnitsFrequencyScaleComment
yield traitNot specified

Related publications

  • Victor Rueda-Ayala, Hella Ellen Ahrends, Stefan Siebert, Thomas Gaiser, Hubert Hüging, Frank Ewert, 2018. Impact of nutrient supply on the expression of genetic improvements of cereals and row crops – A case study using data from a long-term fertilization experiment in Germany, European Journal of Agronomy, Volume 96, Pages 34-46
  • Ahrends, H.E., Eugster, W., Gaiser, T., Rueda-Ayala, V., Hüging, H., Ewert, F., Siebert, S., 2018. Genetic yield gains of winter wheat in Germany over more than 100 years (1895–2007) under contrasting fertilizer applications. Environ. Res. Lett. 13, 104003
  • Project website
  • Khatab Abdalla, Yue Sun, Mohsen Zarebanadkouki, Thomas Gaiser, Sabine Seidel, Johanna Pausch, 2022. Long-term continuous farmyard manure application increases soil carbon when combined with mineral fertilizers due to lower priming effects, Geoderma, Volume 428