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 Centerresearch organisation
- People
Site: Yamagata field site
- Type
- research station field
- Location
- MurakizawaYamagataJapan
- Geographic location
- 38.25, 140.25
- 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
Variable Depth Value (range) Units Ref year Estimated? Baseline? soil pH 0 – 12 Centimetres 5.56 soil organic carbon 0 – 12 Centimetres 8.9 gram per kilogram total soil nitrogen 0 – 12 Centimetres 1.1 gram per kilogram - Climate properties
Variable Time period Value (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
Crop Years grown rice - Factors
- Factor name
- Factor levels
- nitrogen fertilizer exposure
N (80 kgN/ha)
Application frequency: annuallyApplication method: broadcast application methodChemical form: ammonium sulfateBefore soil puddling and rice transplanting.- phosphate fertilizer exposure
P (30 kgP/ha)
Application frequency: annuallyApplication method: broadcast application methodChemical form: monocalcium phosphateBefore soil puddling and rice transplanting.- potassium fertilizer exposure
K (69 kgK/ha)
Application frequency: annuallyApplication method: broadcast application methodChemical form: potassium chlorideBefore soil puddling and rice transplanting.- natural fertilizer exposure
RS (6 t/ha)
Application frequency: annuallyChemical form: rice strawCM1 (10 t/ha)
Application frequency: annuallyChemical form: rice straw compostThis locally recommended rate.CM3 (30 t/ha)
Application frequency: annuallyChemical form: rice straw compost
- Factor combinations
- PK
- phosphate fertilizer exposure: Ppotassium fertilizer exposure: K
- NPK
- nitrogen fertilizer exposure: Nphosphate fertilizer exposure: Ppotassium fertilizer exposure: K
- NPK + RS
- nitrogen fertilizer exposure: Nphosphate fertilizer exposure: Ppotassium fertilizer exposure: Knatural fertilizer exposure: RS
- NPK + CM1
- nitrogen fertilizer exposure: Nphosphate fertilizer exposure: Ppotassium fertilizer exposure: Knatural fertilizer exposure: CM1
- NPK + CM3
- nitrogen fertilizer exposure: Nphosphate fertilizer exposure: Ppotassium fertilizer exposure: Knatural 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 https://doi.org/10.1080/00380768.2016.1155169 [In English]
- 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 https://doi.org/10.1080/00380768.2019.1708209 [In English]