Soil organic matter in a cereal only cropping system, R3-0020, Lönnstorp

Local identifier
R3-0020, M-353-1980
Years operational
1980—
Objective
The aim of these experiments is to study the change in soil organic matter after long-term exclusive cereal production or at four levels of nitrogen addition and with straw either removed or left in field.
Description
The soil organic matter experiments, also called the “humic balance” experiments, consist of two paired experimental series, one with only cereals and one with mostly grass/clover ley, for a total of eight experimental sites. The experiments were started at four different locations between 1970 and 1981. The aim of these experiments is to study the change in soil organic matter after either long-term exclusive cereal production or mixed lay production at four levels of nitrogen addition. Nitrogen is added as mineral fertilizer (Axan, N28). In addition, the effect on soil carbon from removing or leaving the straw is investigated for the cereal experiment. Phosphorus and potassium removed by harvest is calculated for each four year rotation and the corresponding amount is applied as mineral fertilizer during the following rotation. Other plant nutrients are added as needed. Chemical pest and weed control are used. The crop rotation for R3-0020 consists of only cereals, such as winter wheat, spring barley and oats. Crop samples are collected every year and top soil samples every 4th year.
Data Access Statement
Available to any researcher on request
Data Access Notes
https://www.slu.se/en/departments/soil-environment/research/soil-nutrient-cycling/slu-field-research-plant-nutrition/
Data license
Don't know
Data policy
Don't know
Organization
The Swedish University for Agricultural Sciences
research organisation
Person
Dr Sabina Braun
experiment manager
SLU
Soil and Environment

Site: Lönnstorp

Type
research station field
Local code
M-353-1980
Location
Lund
Sweden
Geographic location
55.6689, 13.1028
© OpenStreetMap contributors
Elevation
10 Metres
Visits permitted?
Yes
Visiting arrangements
Contact information for visits here: https://www.slu.se/en/departments/biosystems-technology/research-facilites/lonnstorp/

Design period:

Design Type
Split split plot
Description
Cereal production or at four levels of nitrogen addition and with straw either removed or left in field. Only cereals in the crop rotation. The same amount of phosphorus and potassium that is removed by harvest during a four-year period is added as mineral fertilizer during the following four-year period.
Design description
Four blocks, straw-management in first split and N-level in second split. Sixteen plots total. Plot size 90 sqm.
Number of replicates
4
Number of harvests per year
1
Crops
CropYears grown
spring oats
spring barley
spring wheat
winter wheat
Factors
Factor name
Factor levels
nitrogen fertilizer exposure
N0  (0 kgN/ha)
N40  (40 kgN/ha)
Application frequency: annually
N80  (80 kgN/ha)
Application frequency: annually
N120  (120 kgN/ha)
Application frequency: annually
crop residue management exposure
Straw removed
Straw left in field
Measurements
VariableMaterialUnitsFrequencyScaleComment
soil pHSoilevery 4th year
plant available phosphorousSoilevery 4th yearAmmonium acetate lactate (AL method)
potassium contentSoilevery 4th yearAmmonium acetate lactate (AL method)
soil total carbonSoilevery 4th year
total soil nitrogenSoilevery 4th year
grain yield traitAll cropsYield, content of N, P and K
phosphorous contentAll cropsStraw (when removed)
potassium contentAll cropsStraw (when removed)

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