５号鉢の福助でも９号鉢や尺鉢で栽培している菊よりも大きな花を咲かす・・・・・それが絶対的目標・・・・


もし、お暇でしたら私が参考にしている研究論文のコピーもご覧ください


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1日当たりの給液頻度(1日1回, 1日8回)および根域容量(30, 100, 300ml)がキク'ピンキー'の生育, 蒸発散速度, 光合成特性と気孔の形態に及ぼす影響について調査し, セル苗や鉢物生産などの根域制限下で生じる水ストレスの程度について検討した.根域容量が小さいほど地上部の生長は抑制されたが, 給液頻度を高くすると生育抑制の程度は軽減された.蒸発散速度は根圏の水分量と密接な関係にあり, 根域容量が30mlか100mlの場合は蒸発散量が根圏の最大保水量とほぼ等しくなると蒸発散速度は著しく低下した.しかし, 給液頻度が高い場合には蒸発散速度は高く維持された.気孔は給液頻度が高いほどまた根域容量が大きくなるほど大きくなった.1回-30ml(給液回数-根域容量)と1回-100mlの植物体では, 気孔が小さいばかりでなく, 気孔開孔率(開いている気孔数/全気孔数)が著しく低かった.また, 光合成・蒸散速度および葉内CO_2濃度も, 1回-30mlと1回-100mlの植物体が著しく低かった.以上のように, 養水分を1日8回に分けて供給することによって, 根域制限下で栽培されたキクの蒸発散速度や光合成能力が高く維持され, 約3倍の根域容量で1日1回の養水分供給によって栽培されたキクとほぼ同様あるいはそれ以上の大きさにまで生育させることが可能であった.

This experiment was conducted to clarify the effect of fertigation frequency (once or 8 times per day) on the growth, evapotranspiration rate, and photosynthetic and leaf morphological properties of chrysanthemum (Dendranthema grandiflorum Kitamura cv. Pinky) grown under different restricted root zone volumes (30, 100, and 300 ml). Shoot growth was reduced with decreased root zone volume, but, the growth reduction was smaller when the plants were fertigated 8 times per day rather than once per day. Although the evapotranspiration rate did not decrease when the plants were fertigated frequently, the rate decreased significantly when the total water consumption nearly equaled the water-holding capacity of the medium (50% of the volume), especially in 30-ml or 100-ml containers. Stomata size decreased with a decrease in fertigation frequency and container size. The percentage of open stomata (open/total stomata × 100) and consequently, transpiration rate, net photosynthetic rate, and leaf CO_2 concentration were significantly lower in the plants grown in 30-ml and 100-ml containers, and fertigated once per day, compared to the four other treatments. The rates of photosynthesis and evapotranspiration of the plants fertigated 8 times per day remained faster than those fertigated only once per day. Consequently, vegetative growth of the plants fertigated frequently was equal to or more vigorous than those grown with three fold greater root zone volume but fertigated only once per day.