논문 상세보기
pp.181-186
본 연구는 피복자재와 전기발열체에 의한 포도 유목의 휴면기와 수액이동기 꽃눈 피해를 경감하기 위하여 수행하였다. 1. 저온 환경제어시스템에서 보온력 차이는 볏짚 +부직포 > 부직포 > 볏짚 > 무피복 순으로 높았으며, 볏짚 +부직포 2중피복에서 온도 저하 지연 효과가 가장 좋았으나, 12시간 처리에서는 피복자재별 보온력 차이가 거의 없었다. 2. 휴면기 꽃눈 피해는 캠벨얼리와 MBA가 비슷하였으며, 거봉에서 높았고, 무피복 > 볏짚 > 부직포 > 볏짚 +부직포 순으로 낮았다. 볏짚 +부직포는 −20℃ 6시간 저온처리부터 꽃눈 피해가 발생하여 보온 효과가 높았다. 3. 수액이동기 –10℃ 저온처리에서 꽃눈 피해는 휴면기와 비슷한 경향이었으며, 품종 간에는 차이가 없었으며, 휴면이타파된 수액이동기 저온에서 꽃눈 피해가 더 크다. 4. 전기발열체 +부직포는 −5℃ 3시간 처리에서 휴면기 –20℃에서 −4.8℃, 수액이동기는 −10℃에서 −4.3℃ 주간부 내부온도가 유지되어 방한에 효과적이었다. 5. 짚 +부직포은 휴면기에는 꽃눈 피해가 발생하는데 지연 효과가 있으나 수액이동기에는 효과가 적었으며, −5℃ 설정 전기발열체 +부직포에서는 꽃눈 피해가 발생하지 않았다.
This study sought to reduce damage to grape seedling flower buds - during their dormant period and their sap transfer period - due to covering materials and electric heating elements. In the lowtemperature environment control system, the warmth-keeping difference was found to be higher in order of rice straw+non-woven fabric > non-woven fabric > rice straw > non-covering, and the temperature dropping delay effect was the best in the double covering of rice straw+non-woven fabric, but in the 12-hour treatment, there was nearly no difference in warmth keeping by covering material. In the flower bud damage during the dormant period, ‘campbell early’ and ‘MBA’ were similar and ‘Kyoho’ was high, and damage severity was lower in order of non-covering > rice straw > non-woven fabric > rice straw+non-woven fabric. With the rice straw+non-woven fabric, flower bud damage was caused beginning with the low-temperature treatment of -20℃ and 6 hours, thus having high warmth effects. In the 10℃ low-temperature treatment during the sap transfer period, flower bud damage was similar with the dormant period, and there was no difference between varieties of grapes. At the sap transfer period’s low temperatures with dormancy eliminated, flower bud damage was greater. With the electric heating element+non-woven fabric, at the −5℃ and 3-hour treatment, the daytime internal temperature of −4.8℃ was maintained at the dormant period's 20℃, and −4.3℃ was maintained at the sap transfer period's - 10℃, giving the fabric a good cold prevention effect.
