22 トドマツ, エゾマツ, アカエゾマツ稚苗の冬芽の發生, 開舒及伸長生長開始に就て

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概要

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• 1. The winter bud development The winter bud of fir, spruce and red spruce will de started by scales pri-modias coming out, e.g. Fir in the beginning of july, and Spruce and Red spruce in the beginning of August. The growing bud-cone of the winter bud of Fir presents itself distinctly by foming an upheaval on the shoot top about the end of July, and of the latter two, about the niddle of August, or at the end of the same month. Up to the end of October, almost all the kinds of trees complete winter budding with the outer surface enclosed in resin. Different kind of trees develops their particular colours.As the winter bud grows, the scales will enclose its growing bud-cone in a crown-like cover having resin cannal on the inner and outer parts of the scales. This stage comes to be seen at the end of October, the growing cone develops fully, and primary vascular tissue and the crown being completed at the end of October, the morphological body of the winter bud comes to the complete forma-tion. From this time up to the beginning of December we can recognize the cell split up.2. The time of budding I recognize the division of the nucleus of the bud cell of Spruce and Fir at the end of March, and in the case of Red Spruce the division is recognized at the beginning of April. As the temperature rises, the winter bud begins to put forth, and its scales producing gloss, gradually swells itself. In 3 or 4 weeks the winter bud swells much higger emer ges an inner scales on its top. And winter bud will grow up and swells enough till young leaves begin to emerge themselves among the scales. Thus, the new shoots will continue to grow being covered with the bud-scales which remain as they were. The Fir is the earliest one of the three above-going to start its winter budding, the Spruce follows the Fir, and the Red spruce, the last.3. The beginning of the winter bud-growth.The Fir begins its growing the earliest, Spruce secondly and Red spruce, the last.Spruce terminates its growing the earliest of all, and the other two do a little later than the former. Comparing the term of the witer-budding which all the test-seedlings neces sitated from the beginning to the end, with that of the completed growth of the test-seedlings, it was always found that the former was shorter than the latter. In other word, the test resulted in the fact that the term needed for the winter budding was less than that for the growth of the test-seedlings.4. The following is the figure obtained from the test, which follows the example of Sachs : [table]

• 一般社団法人日本森林学会の論文
• 1950-05-25

著者

• 田添 元

  鹿沼農商高校

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