Yamagata Long-term Experiment

This experiment has been added by the GLTEN Curators using existing published sources.
Objective
To study long-term effects of fertilization and organic inputs
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Organization
Yamagata Integrated Agricultural Research Center
research organisation
People

Site: Yamagata field site

Type
research station field
Location
Murakizawa
Yamagata
Japan
Geographic location
38.25, 140.25
© OpenStreetMap contributors
Visits permitted?
No
Management
Rice is grown in the area from May to September, and the rice field is left fallow for the remaining 7 months per year.
Soil description
The soil at the site is classified as an Inceptisol according to USDA Soil Taxonomy.
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
soil pH0 – 12 Centimetres5.56
soil organic carbon0 – 12 Centimetres8.9 gram per kilogram
total soil nitrogen0 – 12 Centimetres1.1 gram per kilogram
Climate properties
VariableTime periodValue (range)Units
air temperature 1981 – 2010 11.7 degree Celsius
precipitation 1981 – 2010 1163 millimeter

Design period: (1982—)

Design description
Plot area is 100 m2. For all factor levels except RM (rice straw), the rice straw was removed after harvest.
Crop
CropYears grown
rice
Factors
Factor name
Factor levels
nitrogen fertilizer exposure
N  (80 kgN/ha)
Application frequency: annually
Application method: broadcast application method
Chemical form: ammonium sulfate
Before soil puddling and rice transplanting.
phosphate fertilizer exposure
P  (30 kgP/ha)
Application frequency: annually
Application method: broadcast application method
Chemical form: monocalcium phosphate
Before soil puddling and rice transplanting.
potassium fertilizer exposure
K  (69 kgK/ha)
Application frequency: annually
Application method: broadcast application method
Chemical form: potassium chloride
Before soil puddling and rice transplanting.
natural fertilizer exposure
RS  (6 t/ha)
Application frequency: annually
Chemical form: rice straw
CM1  (10 t/ha)
Application frequency: annually
Chemical form: rice straw compost
This locally recommended rate.
CM3  (30 t/ha)
Application frequency: annually
Chemical form: rice straw compost
Factor combinations
PK
phosphate fertilizer exposure: P
potassium fertilizer exposure: K
NPK
nitrogen fertilizer exposure: N
phosphate fertilizer exposure: P
potassium fertilizer exposure: K
NPK + RS
nitrogen fertilizer exposure: N
phosphate fertilizer exposure: P
potassium fertilizer exposure: K
natural fertilizer exposure: RS
NPK + CM1
nitrogen fertilizer exposure: N
phosphate fertilizer exposure: P
potassium fertilizer exposure: K
natural fertilizer exposure: CM1
NPK + CM3
nitrogen fertilizer exposure: N
phosphate fertilizer exposure: P
potassium fertilizer exposure: K
natural fertilizer exposure: CM3

Related publications

  • Weiguo Cheng, Agnes T. Padre, Chizuru Sato, Hiroyuki Shiono, Satoshi Hattori, Akihiko Kajihara, Masakazu Aoyama, Keitaro Tawaraya & Katsumi Kumagai (2016) Changes in the soil C and N contents, C decomposition and N mineralization potentials in a rice paddy after long-term application of inorganic fertilizers and organic matter, Soil Science and Plant Nutrition, 62:2, 212-219
  • Toan Nguyen-Sy, Weiguo Cheng, Samuel Munyaka Kimani, Hiroyuki Shiono, Reo Sugawara, Keitaro Tawaraya, Toru Watanabe & Katsumi Kumagai (2020) Stable carbon isotope ratios of water-extractable organic carbon affected by application of rice straw and rice straw compost during a long-term rice experiment in Yamagata, Japan, Soil Science and Plant Nutrition, 66:1, 125-132