Artificial regeneration of Japanese red pine [Pinus densiflora] by directly seed sowing to forest: Germination of seed and growth of early stage

Wakushima, S.

Artificial regeneration of Japanese red pine [Pinus densiflora] by directly seed sowing to forest: Germination of seed and growth of early stage

2001

Wakushima, S. (Hiroshima-ken. Forest Experiment Station, Miyoshi (Japan))

Seed of Japanese red pine was sowed directly in damaged pine tree forest by pinewood nematode for regeneration. Sowing nests (20 * 20cm) were made 325 at every 2 * 1.5m square after the damaged forest was clear cutted and site prepared (0.1 ha). Red pine seeds (germination rate in laboratory : 83.5%) were sowed 4 grains per 1 sowing nest in March 25, 1998. Germination was observed in the sowing nest after 3 weeks, and germination rate was reached highest (45.9%) in May. The rate of the sowing nest contains pine seedlings alive was 78.5% after 3 years. Then, average height of the pine seedlings was 49.3cm (brush cutting) and 36.0cm (no brush cutting). This experiment indicate that the directly seed sowing to the forest was available in the place where the undergrowth vegetations was grown only a few amounts.

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