Hengyang long-term rice green manuring experiment

This experiment has been added by the GLTEN Curators using existing published sources.
Objective
To study the effects of green manuring on a double rice system.
Description
The paper by Gao Song-Juan describes this experiment as being at Hengyang Red Soil Experimental Station. This seems to be the same location as the Qiyang National Farmland Ecosystem Observation and Research Station (see referenced websites).
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Organization
People

Site: Qiyang

Type
research station field
Location
Qiyang
Hunan
China
Geographic location
26.755446, 111.87275
© OpenStreetMap contributors
Elevation
150 Metres
Visits permitted?
No
Soil type
acrisol
Soil description
Classified as Ferralic Cambisol on the FAO classification system (FAO 2006). It is a typical red paddy soil of southern China, and originally developed from quaternary red clay.
Soil properties
VariableDepthValue (range)UnitsRef yearEstimated?Baseline?
soil pH 6.5
soil organic matter 20.1 gram per kilogram
total soil nitrogen 0.94 gram per kilogram
total soil phosphorous 0.66 gram per kilogram
total soil potassium 11.5 gram per kilogram
plant available nitrogen 156 milligram per kilogram
plant available phosphorous 7.2 milligram per kilogram
plant available potassium 176 milligram per kilogram
Climatic type
humid subtropical climate
Climate properties
VariableTime periodValue (range)Units
air temperature18.3 degree Celsius
frost free days300
precipitation1250 millimeter

Design period: (1982—)

Design Type
Randomized complete block design
Description
The experiment has early and late rice crops each year and green manures are incorporated into the soil. The same rates of N, P, and K fertilizer are applied for both early and late rice, at 153 kg N ha-1, 84 kg P2O5 ha-1, and 129 kg K2O ha–1, respectively. Rice straw was removed from the plots after rice harvesting.
Design description
Plot size is 2.5 m×15.0 m.
Crops
CropYears grown
rice
winter rapeseed
rye grass
bare fallow
milk vetch
Crop Rotations
RRV
  • 1
    rice
    rice
    milk vetch
RRP
  • 1
    rice
    rice
    winter rapeseed
RRG
  • 1
    rice
    rice
    rye grass
RRF
  • 1
    rice
  • 2
    rice
    bare fallow
Factor
Factor name
Factor levels
green manure exposure
Green manures are applied as defined by the four rotations.
bare fallow
Control exposure
rye grass
milk vetch
winter rapeseed
Measurement
VariableMaterialUnitsFrequencyScaleComment
soil propertiesSoil

Related publications

  • Song-juan GAO, Ju-sheng GAO, Wei-dong CAO, Chun-qin ZOU, Jing HUANG, Jin-shun BAI, Fu-gen DOU, 2018. Effects of long-term green manure application on the content and structure of dissolved organic matter in red paddy soil, Journal of Integrative Agriculture, Volume 17, Issue 8, 2018, Pages 1852-1860