81006527

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セイチョウソ リヨウ ニヨル クリ ノ トリキ ニツイテ

The Use of Growth Substances for the Rooting of Chestnut Layer

Japanese (日本語)

兵庫農科大學研究報告. 農学編

2(2)

161-168

兵庫農科大学

1956

2014-06-06

Four years old seedlings of the Japanese chestnut 'Gin-yose' were used chiefly for the layerage expriments applying some growth promoting substances. During 1955∿′56,these preliminary experiments were carried out in the field of Hyogo University of Agriculture, Sasayamacho, Takigun, Hyogo Prefecture. In the winter of 1955,the seedlings as the mother stocks were cut short to about a foot and a half and were planted in rows spacing a foot. For the purposes of getting more sprouts and ample spaces for them, a special care has been taken to plant some of them slantingly keeping an angle of about 15°and others were planted normally erect. To every basal part of the new sprouts which have arisen from the mother stocks, a slight wound was made and a dose of lanolin paste of 10mg./g. γ-indole butyric acid or other growth substances were applied and covered with earth. Such treatment has been done from early June till the end of July. Further a few marcotting experiments have been also carried out upon the branches of the first year growth, ringing the girths of 1∿2cm wide and applying with some growth substances such as α-naphthalene acetic acid, β-indole acetic acid, 2,4-dichlorophenoxy acetic acid and γ-indole butyric acid. Then they were embedded by damp sphagnum mosses, and wrapped up with sheets of polyethylene. By the layerage, fairly 80 percent of those treated have rooted in 20 days, but only a few of those by marcots have rooted. But the authors can assert that the ringing of the girth of 2cm wide with lanolin paste would induce more rooting than those of no ringing by their few experiments. There was no correlation between the length of shoots and the percentages of those rooted.

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