暖地における薄荷の生育過程に関する研究 : 第3報 葉の生育経過 : 第4報 地上部および地下部の生育経過と水分の吸収
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III. The growth of leaf (1) Elongating process of the leaves resembled to Robertson's autocatalytic curve. Leaf weight increased regularly according to the leaf level from base to top, attained to maximum at several nodes on middle level, then decreased towards top. (2) Emergence of the leaf at higher levels than XIIth almost coincided with that of lateral shoot from the node three nodes lower in the main stem. (3) The size of leaf was largest in main stem, and became smaller according to the proceeding of growth period. The living period and the developing period has been shortened as the size became smaller. IV. Development of top and subterranean part and water absorption (1) Elongation of plant has begun progressively about three weeks later from the 2nd and the 3rd harvest. (2) The number of stems attained to maximum in late March, then decreased during the 1st growth period. In the 2nd and 3rd period it increased remarkably during about three weeks after every harvest, (3) The new rhizomes were formed first at early or middle April in Var. Sanbi, but later in other varieties observed. The number of new rhizomes decreased markedly after every harvest, as they grew to new stems, then increased with plant growth. (4) After every harvest roots degenerated for a while, being more seriously after the 1st harvest. Roots developed comparatively shallow depth in the 3rd period. (5) Water absorption was remarkable in the middle and the later stage of the 2nd period corresponing to the plant growth. But it did not increase in proportion to the leaf development in the later stage of the 3rd period. From the results stated in the reports I〜IV, the authors has devided every growth period into the following several stages. 1st growth period: Sprouting stage-Lateral shoot developing stage-Elongating stage 2nd and 3rd period: New stem developing stage-Elongating stage-Floral budding stage-Flowering stage.
- 日本作物学会の論文
- 1961-04-01
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