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NEC Rice Paddy Story NEC Rice Paddy Cultivation Project with Asaza Fund
Observation Records of Living Organisms
Survey of living organisms in Kamiota district of Ushiku City
Before restoring a paddy field in ravine of Kamiota district additionally beginning FY 2012, the condition of a fallow rice field in FY 2011 and living organisms throughout the four seasons after starting restoration of the rice paddy in FY 2012 were surveyed to check changes in living organisms before and after restoration. Various living organisms could be seen in the paddy field in ravine after restoration. A significant change was seen especially with dragonflies.
Changes in the area of the restored rice paddy
The fallow rice field densely covered with weeds was restored and the surface of the water appeared. As a result, dragonflies that like marshland rich in vegetation and dragonflies that like the surface of the water have increased.
| Type | 2011 | 2012 | |
|---|---|---|---|
| Dragonflies that like marshland rich in vegetation | Indolestes peregrinus | 0 | 11 |
| Ischnura senegalensis | 0 | 24 | |
| Dragonflies that like the surface of the water | Orthetrum albistyrum speciosum | 2 | 42 |
| Sympetrum frequens | 1 | 11 |
Changes in other areas
A wooded area near the paddy field in ravine was developed to create a large space in the woods and more dragonflies that like flying in the woods can be seen there.
| Type | 2011 | 2012 | |
|---|---|---|---|
| Dragonflies that like flying in the woods | Sympetrum eroticum eroticum | 5 | 38 |
| Sympetrum infuscatum | 97 | 205 |
Survey of the amount of feed for crested ibis
A crested ibis is estimated to eat about 75 kg of feed in a year. A decision was made to periodically survey the amount of feed for crested ibises in restored rice paddies so that they can live in these rice paddies. The amount of feed found in a survey in FY 2012 was 1.5 g/m2 compared with the target of 4 g/m2, showing that it was exceedingly short of the amount required for crested ibises to live in them. Efforts will continuously be made in the future to restore paddy field in ravine by building an environment for the inhabitation of crested ibises such as creating biotopes and grassland.
(Wooden frames measuring 1 m x 1 m were sunk in rice paddies, life forms living in these frames were caught, and types and quantities of them were surveyed)
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