Miyawaki observed the trees which traditionally grew around temples, shrines, and cemeteries in Japan were native species, relics of the primary forest and at the same time he calculated that only 0.06% of contemporary Japanese forests were indigenous forests. Contemporary forests, created according to forestry principles, are not in his view the most resilient nor the best suited vegetation for the geobioclimatic conditions in Japan, neither are they the most suited to address climate change. >> More info on Pr. Akira Miyawaki's life on Wikipedia
Referring to potential natural vegetation (PNV) (a concept he studied in Germany), he developed, tested and refined a method of ecological engineering today known as the "Miyawaki method" to restore native forests from seeds of native trees on very degraded soils which were deforested and without humus. Using ecological theories and the results of his experiments, he quickly and successfully restored, sometimes over large areas, protective forests (disaster-prevention, environment-conservation and water-source-protection forests) So take a look on how you could create a Miyawaki forest in your garden, here we go!
Site survey and the discovery of the Natural Potential Vegetation.
Identification of the native species 20km around the selected zone for the afforestation. It's recommended to identify between 50 and 100 different species, they can be bought at a nursery or found nearby and transplanted.
Soil cleaning, addition of organic nutrients, preparation of elements permitting water retention (to be added later once the plantation finished) and the creation of a hill (30 degrees maximum slope).
Plantation by the volunteers.
Plant between 3 to 5 little trees per squared meter.
Apply the straw protection, that allow the creation of wood humidity and water retention.
Watering and weed control during 3 years. Reuse the dead plants (mortality tipically around 5%) and weeds as straw putting it on the top of the hill.
After 3 years the forest site becomes autonomous. It doesn't need any more maintenance: « No management is best management » according to Prof. Miyawaki.
Here you can see some example of Miyawaki forests, before and after the plantation.
Forest planted with many volunteers next to the "Porte de Montreuil".
IVN Natuur Educatie
Forest plamnted by the local community of Zaandam of and its school children.
Forest plantewd in Shubhendu Sharma's private backyard.
Forest planted by Prof. Akira Miyawaki and his students 10 yeras ago.