Horticulture, Environment, and Biotechnology : HEB

Korean Society of Horticultural Science (한국원예학회)
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Effect of Low Temperature Period on the Dormancy Breaking of Asparagus (Asparagus officinalis)

아스파라거스의 휴면타파에 미치는 저온경과 시간의 영향

Seong, Ki-Cheol;Lee, Jeong-Su;Seo, Hyo-Duk;Yoo, Byong-Chun;Lee, Jae-Wook;Kwon, Hyeog-Mo
;이정수;서효덕;유병천;이재욱;권형모

  • Published : 20020000
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Abstract

The effects of period of low temperature treatments on the dormancy breaking of asparagus for year-round production were investigated using three year old ‘Excel’ sparagus plants. Crowns from three year old plants grown in the field were transplanted to the greenhouse. Following the accumulated time of low temperature below 5$^{o}C$ for 250, 500, 750, 1,000, 1,250, 1,500 or 1,750 hours, they were exposed to 15$^{o}C$ to measure the degree of sprouting. To induce artificial dormancy breaking, crowns under dormancy were treated for 2 or 3 weeks at 5$^{o}C$. Under the open field condition, dormancy began at early December and reached its peak during late December to early January. This corresponded with accumulated hours of 1,000~1,250. Dormancy was broken from mid-January. The results of this experiment indicated that low temperature treatment increased the rates of marketable spear yields to 85% against 31% of non-treated. Also, it was considered that the best digging time of crowns for forcing culture seemed to be early January when the dormancy was broken. The low temperature treatment at 5$^{o}C$ for 3 weeks was most effective for the dormancy breaking of asparagus.

아스파라거스의 주년생산을 위한 휴면 특성을 검토하기 위하여 Excel 품종 3년생 주를 공시하였다. 노지의 기온 5oC 이하 저온 누적시간으로 250, 500, 750, 1,000, 1,250, 1,500, 1,750시간이 경과할 때마다 보온 및 가온을 하여 맹아성을 조사하였으며, 인위적인 휴면타파를 위해 휴면 중인 근주를 5oC에서 2주 및 3주간 각각 저온처리 하였다. 아스파라거스의 휴면은 5oC 이하 저온 누적시간 1,000~1,250시간인 12월 하순에서 1월 상순경에 깊은 휴면에 돌입하였으며, 1월 상순 이후에는 휴면으로부터 완전히 타파되는 것으로 생각되었다. 휴면중인 근주를 5oC에서 3주간 저온처리 하여 비교한 결과 상품수량 85%로 무처리 31%에 비하여 저온처리에 의한 휴면타파 효과가 컸다. 따라서 촉성재배를 위한 근주의 굴취 시기는 휴면이 타파되는 1월 상순 이후가 적당할 것으로 생각되었으며, 휴면 중인 근주의 경우 5oC에서 3주간의 저온처리를 할 경우 휴면타파가 가능 한 것으로 생각되었다.

Keywords

References

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  23. Received for publication 2 August 2002. Accepted for publication 9 October 2002