Effects of Establishment Time and Size of Mother Fern on Yield of Spears in Semi-Forcing Green Asparagus (Asparagus officinalis L.) Cultivation

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  • アスパラガスの半促成長期どり栽培の収量に及ぼす立茎開始時期と親茎の太さの影響
  • アスパラガス ノ ハンソクセイチョウキドリ サイバイ ノ シュウリョウ ニ オヨボス リツケイ カイシ ジキ ト シンケイ ノ フトサ ノ エイキョウ

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Abstract

This study investigated the cultivation technique for high yield with high profit in mother fern green asparagus (Asparagus officinalis L.) cultivation. Effects of standing time and size of mother fern on the yield and size of spears were investigated. Spear emergence was temporarily suppressed after the beginning of mother fern establishment. When the beginning of mother fern establishment was later, the spear yields in spring and summer became higher and lower, respectively. The highest yield throughout the whole harvesting period was given when the mother fern was established from 50 to 60 days after spear harvesting. The optimal diameter of mother fern for higher yields in summer and next spring, for total spears and for a higher rate of large (L) class spears ranged from 10 to 14 mm. As the price of spring spears is higher than that of summer spears, the highest profit was expected when the mother fern was established between 50 and 60 days after spear harvesting.<br>

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