Thyrow Endurance Field Experiments: Static crop rotation and straw fertilization test

This experiment has been added by the GLTEN Curators using existing published sources.
Local identifier
Years operational
Effect of straw fertilization on the content of soil organic matter, biomass production and nitrogen utilization with staggered mineral N fertilization in crop rotations with different grain content.
In 1976, a previous experimental area was divided into three fields for the current "Thy_D5" experiment. In field 1, the original crop rotation continues with 50% cereals, in field 2 and field 3 it has been replaced by a crop rotation with 75% and 100% cereals respectively. Since then, manure fertilization has been omitted or replaced by straw fertilization. Nitrogen fertilization has been carried out in four stages since 1976. By means of annual soil analyses, year-related and long-term changes in the carbon content in the soil are to be determined after changes in management in 1976. They enable statements to be made about the location of the site- and management-specific humus equilibrium, about the duration of the transition phases (equilibrium time), about the C release potential or about the potential of additional C storage. Especially against the background of various options for straw utilization (straw export or straw for humus reproduction), questions will be answered about the effect of straw fertilization on the carbon content in the soil and its correlation with biomass production, about the effect of mineral N fertilization on the amount of straw produced and the resulting effect on the C content in the soil as well as about the influence of straw fertilization on N utilization in the soil-plant system. In the comparison of crop rotations, the crop rotation effect on the C content of the soil as well as the relationship between biomass export and C storage in the soil are of interest.
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Humboldt University Berlin

Site: Thyrow

research station field
Local code
Geographic location
52.1509, 13.1409
© OpenStreetMap contributors
Visits permitted?
The experiment is located on an area where different forms of potash fertilizer were tested from 1937 to 1971 in combination with manure fertilization.
Soil type
Soil description
Albic Luvisol
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
sand content 83.1 Percent
silt content 16.2 Percent
clay content 2.7 Percent

Design period: Current design period (1976—)

Number of test elements: 2x4=8+2 additional test elements = 10 Number of repetitions: 2 (per test series) Number of cuts: 20 (per crop rotation) = 60 Test facility: Block system (AxB)-B1 Test crop: spring barley Additional test elements: ZP1 without organic fertilization since 1972 / ZP2 without organic fertilization since 1937
CropYears grown
spring barley
winter barley
spring barley
yellow mustard
Factor name
Factor levels
straw amendment exposure
without straw fertilization
Chemical form: straw
with straw fertilization
nitrogen fertilizer exposure
N1 without  (0 kgN/ha)
without N fertilizer
N2 low  (40-60 kgN/ha)
Low nitrogen fertilizer: 40kg to grain and 60kg to maize and potatoes
N3 local  (80-120 kgN/ha)
Local nitrogen fertilizer: 80kg to grain and 120kg to maize and potatoes
N4 elevated  (120-180 kgN/ha)
Elevated nitrogen fertilizer: 120kg to grain and 200kg to maize and potatoes
plant growth and developmentNot specified
yield componentsNot specified
soil organic carbonNot specified

Related publications