"Effects of cultivar, extent of cumulative chilling exposure, age of rootstock and sex on growth of spear in asparagus [Asparagus officinalis] forcing culture."
2002
"Koizumi, T. (Gunma-ken. Horticultural Experiment Station, Azuma (Japan)) | Yamazaki, H. | Yamato, Y. | Hamano, M. | Takahashi, K. | Miura, H. "
"A study was carried out to evaluate the effect of cultivar, extent of cumulative chilling exposure, age of rootstock and sex on growth of the spear in asparagus (Aspargus officindlis L.) forcing culture. The following results were obtained: As the extent of cumulative chilling exposure increased, crooked spear occurrence decreased. There was no browning due to Fusarium wilt observed in the vessel of crooked spears. These results suggest that crooked spear occurrence in forcing culture was caused by dormancy. Regardless of cultivar, as the extent of cumulative chilling exposure increased, the number of spears and marketable spear weight increased. Even if the cumulative chilling exposure was not extensive, crooked spear occurrence of _eBaitoru_f and _eWelcome_f decreased, and the number of spears and marketable spear weight of these cultivars were sufficient, suggesting that the dormancy of these cultivars was less than that of _eGreen tower_f and _eSuper welcome_f. Planting of one-year-old male, female and two-year-old male asparagus rootstock of _eGreen tower_f in a hotbed can be done 2 weeks earlier than that of two-year-old female rootstock."
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