China LTFE Network - Qiyang

This experiment has been added by the GLTEN Curators using existing published sources.
Objective
To assess the sustainability of agricultural systems including: 1. whether acceptable crop yields can be maintained over a long period, 2. the nutrient inputs required to maintain crop yields and soil reserves of nutrients 3. understand costs of nutrient losses
Description
This experiment is part of the China National Soil Fertility and Fertilizer Efficiency Long-term Monitor Network which aims to address problems around sustainability of agricultural systems by studying cropping systems across nine highly diverse regions of China. The experiments represent approximately 86 Mha of arable land in China and are relevant to large areas in other parts of Asia and elsewhere.
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Organization
China National Soil Fertility and Fertilizer Efficiency Long-term Monitor Network
research network
People

Site: Qiyang

Type
research station field
Location
Qiyang
Hunan
China
Geographic location
26.753333, 111.875556
© OpenStreetMap contributors
Elevation
120 Metres
Visits permitted?
No
Soil description
Red soil with a clay texture.
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
sand content0 – 20 Centimetres3.7 Percent
silt content0 – 20 Centimetres34.9 Percent
clay content0 – 20 Centimetres61.4 Percent
soil density0 – 20 Centimetres1.3 gram per cubic centimetre
soil pH0 – 20 Centimetres5.7
soil organic carbon0 – 20 Centimetres8.1 gram per kilogram
total soil nitrogen0 – 20 Centimetres1.07 gram per kilogram
Climate properties
VariableTime periodValue (range)Units
air temperature18.3 degree Celsius
precipitation1276 millimeter

Design period: (1990—)

Design description
The experiments have a single block with treatments randomized within it. Experiments are unreplicated. Plots measure 196 m2. The experiment uses a double cropping of a wheat-maize rotation with two crops per year.
Number of harvests per year
2
Crops
CropYears grown
wheat
maize
Factors
Factor name
Factor levels
nitrogen fertilizer exposure
N  (90 kgN/ha)
Applied to crop: wheat
Chemical form: urea
210 kg N ha-1 to maize. Where N treatments are combined with manure, N is applied at a lower rate to bring the total N application to 90 or 210 kg N ha-1 for wheat and maize respectively.
N1.5  (41 kgN/ha)
Applied to crop: wheat
Chemical form: urea
95 kg N ha-1 to maize. For both wheat and maize, N1.5 is used only in combination with manure. N1.5 is the combined N from the urea and manure.
superphosphate exposure
P  (16 kgP/ha)
Applied to crop: wheat
Chemical form: single superphosphate
37 kg P ha-1 to maize.
P1.5  (24 kgP/ha)
Applied to crop: wheat
Chemical form: single superphosphate
55 kg P ha-1 to maize
potassium fertilizer exposure
K  (30 kgK/ha)
Applied to crop: wheat
Chemical form: potassium chloride
70 kg K ha-1 to maize
K1.5  (45 kgK/ha)
Chemical form: potassium chloride
105 kg K ha-1 to maize
natural fertilizer exposure
M  (40 t/ha)
Applied to crop: All crops
Chemical form: pig manure
30% before wheat and 70% before maize
M1.5  (60 t/ha)
Applied to crop: All crops
Chemical form: pig manure
30% before wheat and 70% before maize
St  (2 t/ha)
Applied to crop: All crops
Chemical form: maize straw
50% before wheat and 50% before maize
Factor combinations
Control
No inputs applied
N
nitrogen fertilizer exposure: N
NP
nitrogen fertilizer exposure: N
superphosphate exposure: P
NK
nitrogen fertilizer exposure: N
potassium fertilizer exposure: K
PK
superphosphate exposure: P
potassium fertilizer exposure: K
NPK
nitrogen fertilizer exposure: N
superphosphate exposure: P
potassium fertilizer exposure: K
NPK+M
nitrogen fertilizer exposure: N
superphosphate exposure: P
potassium fertilizer exposure: K
natural fertilizer exposure: M
1.5(NPK+M)
nitrogen fertilizer exposure: N1.5
superphosphate exposure: P1.5
potassium fertilizer exposure: K1.5
natural fertilizer exposure: M1.5
NPK+St
nitrogen fertilizer exposure: N
superphosphate exposure: P
potassium fertilizer exposure: K
natural fertilizer exposure: St
M
natural fertilizer exposure: M
Measurements
VariableMaterialUnitsFrequencyScaleComment
grain yield traitAll crops
nitrogen contentAll crops
phosphorous contentNot specified
potassium contentAll crops

Related publications

  • Zhao, B.-q., Li, X.-y., Li, X.-p., Shi, X.-j., Huang, S.-m., Wang, B.-r., Zhu, P., Yang, X.-y., Liu, H., Chen, Y., Poulton, P., Powlson, D., Todd, A. and Payne, R. (2010), Long-Term Fertilizer Experiment Network in China: Crop Yields and Soil Nutrient Trends. Agron. J., 102: 216-230.