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 Universityresearch organisation
- Person
- Dr Hubert Hügingprincipal investigatorBonn UniversityInstitute of Crop Science and Resource Conservation
Site: Experiment site
- Type
- research station field
- Location
- WesselingNorth Rhine-WestphaliaGermany
- Geographic location
- 50.807934, 6.953046
- 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
Variable Time period Value (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
Crop Years grown winter wheat clover potatoes oats sugar beet winter rye - Crop Rotations
- Cl-O-SB-WW-WR 1904—1950
- 1clover
- 2oats
- 3sugar beet
- 4winter wheat
- 5winter rye
Cl-P-SB-WW-WR 1951—2009- 1clover
- 2potatoes
- 3sugar beet
- 4winter wheat
- 5winter rye
Cl-P-SB-WW-WR 2010—- 1clover
- 2potatoes
- 3sugar beet
- 4winter wheat
- 5winter rye
- Factors
- Factor name
- Factor levels
- fertilizer exposure Factor describes different combinations of sources of fertilizer
organic fertilizer
Chemical form: farmyard manureinorganic fertilizers
synthetic fertilizersupplementary inorganic fertilizers
- nitrogen fertilizer exposure
- phosphate fertilizer exposure
- potassium fertilizer exposure
- calcium nutrient exposure
- Measurement
Variable Material Units Frequency Scale Comment yield trait Not 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 https://doi.org/10.1016/j.eja.2018.03.002 [In English]
- 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 https://doi.org/10.1088/1748-9326/aade12 [In English]
- Project website https://www.lap.uni-bonn.de/en/research/projects/long-term-experiment-dikopshof [In German, English]
- 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 https://doi.org/10.1016/j.geoderma.2022.116216 [In English]