アスパラガスの半促成長期どり栽培の収量に及ぼす摘心と下枝除去の位置の影響(栽培管理・作型)  [in Japanese] Effects of Pinching and Lower Branch Pruning on Yield of Spears in Semi-Forcing Green Asparagus (Asparagus officinalis L.) Cultivation  [in Japanese]

アスパラガスの半促成長期どり栽培における若茎の階級別収量に及ぼす親茎の摘心と下枝の除去位置の影響を検討した結果,親茎を地上140cmで摘心し,50cm以下の側枝を除去することにより,夏芽と翌年春芽の可販収量,特に単価の高い太い若茎(L級)の収量が増加した.摘心と下枝除去位置の幅が80〜90cmの場合に夏芽の収量は最大となった.また,摘心と下枝除去位置の幅が広い程翌年の春芽の収量は増加したが,幅90cm以上では差がみられなかった.

The objective of this study was to establish the cultivation technique for high yield with high profit in mother fern green asparagus (Asparagus officinalis L.) cultivation. Effects of pinching and lower branch pruning on the yield and size of spears were investigated. The marketable yield, especially large (L) class spear yield with high unit price was the highest in both the summer and subsequent spring seasons, when mother ferns are pinched to a 140cm height with removal of the lower branches at a 50cm height. The marketable yield in summer spears showed maximum values when the width between pinching and the lowest branch heights was 80〜90cm. The marketable yield of spears in the subsequent spring increased with increases in both the width of pinching and the lowest branch height to 90cm.