マツの枯死・衰退に対する活力剤の効果 (1)

Effect of a tree tonic on pine tree vitalities (1)

Nakane Kaneyuki

Ebisu Kouji

広島大学総合科学部紀要. IV, 理系編

Memoirs of the Faculty of Integrated Arts and Sciences, Hiroshima University. IV, Science reports

A tree tonic, which was the powder composed of seven kinds of herb medicines, rice brain, soybean, rice, pearl barley and etc., was exploited and its effectiveness on recovering or maintaining the vitality of trees was examined by the field treatment at seven pine (Pinus densiflora and P. thunbergii) stands in Hiroshima and Yamaguchi Prefectures. The tonic solution was injected into the soil at 6-90 points just around each trunk of about 3,700 pine trees (treatment trees). One year later their vitality, which was evaluated by the leaf longevity and divided into eleven grades, was measured again as same as just before the treatment. The average mortality of the treatment trees was only 0.8(nil)er year, while 17.10f non-treatment, i. e., control 4,700 trees, which were adjacent to the treatment trees, died during the year. The vitality of treatment trees became up on an average rather more than before treatment. The facts suggest remarkable effects of the tonic on the vitality of trees.

Herb medicine

Organic fertilizer

Pine tree

Tree tonic

Vitality

Forestry [ 650 ]

jpn

広島大学総合科学部

[Created] 2006-03-21

[ISSN] 1340-8364

[NCID] AN10435936