培養液のpHと濃度が養液栽培ニラの生育に及ぼす影響(栽培管理・作型)  [in Japanese] Effects of pH and Concentration of Nutrient Solution on Growth of Hydroponically Cultured Chinese Chive (Allium tuberosum Rottler)(Crop Production & Cropping Type)  [in Japanese]

ニラの水耕における条件を調べるため,培養液(大塚ハウス肥料A処方)のpHを4.5,5.5,6,5,7.5の4段階に,濃度を1/4,1/2,1,2単位の4段階に設定して,ニラ苗の生育と刈り取り後の地上部の再生を比較した.その結果,ニラ苗の生育は,pHにはほとんど影響されず,2単位の濃度でのみ抑制された.また,ニラ地上部の再生は,培養液のpH4.5で,あるいは培養液濃度2単位で抑制された.これらの結果から,ニラの水耕に好適な培養液pHは5〜7であり,濃度は1/4〜1単位であると判断した.

Seedlings and detopped plants of Chinese chive (Allium tuberosum Rottler) were grown in four levels of nutrient solution pH (4.5, 5.5, 6.5 and 7.5 of 1 strength solution) and four concentrations (1/4, 1/2, 1 and 2 units of standard solution of pH6.0) to study conditions for hydroponic production. The growth of seedlings was less affected by the solution pH, but was reduced at the highest concentration (2 units of standard solution). The re-growth of detopped plants was reduced at pH 4.5 and by the highest concentration. These results show that Chinese chive has the adaptability to wide range of pH and concentration of the nutrient solution in hydroponic cultivation. It is estimated that the optimal pH is 5 to 7, and optimal concentration of nutrient solution is 1/4 to 1 unit of standard solution for hydroponic cultivation of Chinese chive.