キリンソウと四季の彩り日記屋上緑化システム株式会社
技術顧問　山下律正

233　四季彩14　環境変化

233

四季彩14の環境変化

Environmental changes in Shikisai 14

１　四季彩14は環境変化により草姿の草丈はあまり変わらず、キメラ色は変化しやすい品種です。

２　特に冬至芽の草姿は最も影響を受けやすい事が判っている。葉色は幼冬至芽は白色～明黄色（ライトグリーン）～淡紅明黄緑の範囲に収まり、２月頃より本来の色調に変化し、６月～１２月は環境に適合した明黄色（ライトグリーン）～濃緑色葉色に変化して落葉を迎える。６月～１２月は環境に適合した明黄色～濃緑色葉色は露天環境では明らかに変化し、日陰環境でも明黄色（ライトグリーン）の維持は難しく緑色系に移行した色調となる。

３　耐候性はタケシマキリンソウ原種に比べると劣る。耐候性の影響の仕方は、旱（ひでり）よりも蒸れに大きく左右され、土質の影響を受ける。

培土の剪定は、見かけ比重よりも保水性に着目して剪定する必要がある。サボテン用培土のような透水性と保水性に優れた培土を使用すると耐候性を高める。

４　肥料は後撒きをすると葉に残った肥料により葉やけを生じやすいので、元肥を長期緩効性肥料を入れる事を推薦する。

５　耐候性に抵抗できる育苗令は春植え苗で１年経過後、秋植え苗で２年経過後を目安にすればよい。

６　キメラと全斑の出現割合はおおよそ８：２程度である。

７　キメラと全斑の緑被率割合はおおよそ８：１程度である。

1 Shikisai 14 is a variety whose plant height does not change much due to environmental changes, but its chimera color changes easily.

2 In particular, the appearance of winter buds is the most susceptible. The leaf color ranges from white to light yellow (light green) to light red and light yellow green at young winter solstice buds, and changes to its original color from around February, and from June to December it changes from light yellow (light green) to dark green, which is compatible with the environment. The leaves change color and begin to fall. From June to December, the color changes in an open environment, and even in a shaded environment it is difficult to maintain a bright yellow (light green) color, resulting in a greenish tone.

3 Weather resistance is inferior to the original species of Bamboo shoots. Weather resistance is affected more by dampness than by drought, and is influenced by soil quality. When pruning cultivated soil, it is necessary to pay attention to its water retention capacity rather than its apparent specific gravity. Using a soil specialized for water permeability and water retention, such as soil for cacti, will increase weather resistance.

4. If fertilizer is applied later, the fertilizer left on the leaves tends to cause leaf burn, so it is recommended to use a long-term slow-release fertilizer as the base fertilizer.

5. The age at which seedlings can withstand weather resistance should be set after one year for spring-planted seedlings and after two years for fall-planted seedlings.

6. The appearance ratio of chimera leaves and lemon-lime colored leaves is approximately 8:2.

7. The green coverage ratio between chimera leaves and lemon-lime colored leaves is approximately 8:1.

環境による変化例　　Examples of changes due to environment

４月の葉の色の変化　Change in leaf color in April