미나리 겨울철 하우스 재배 시 수위에 따른 생육특성
Growth Characteristics of Water Dropwort(Oenanthe javanica) in Winter Season on Different Water Levels in Paddy Field Greenhouse Cultivation
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초록
미나리(Oenanthe javanica)는 주로 논에서 담수형태로 재배하여 김치재료나 탕용으로 널리 활용되고있다. 담수재배시 거머리나 혐오생물들이 검출될 수 있으며, 수확 후 신선도가 떨어져 품질저하의 원인이 되고 있어 청결한 미나리 생산을 위해 저수위로 관리하여 미나리 생육특성을 조사하였다. 담수재배의 첫 번째 마디와 두 번째 마디는 물에 잠겨 있어 절간장이 저수위재배보다 각각 2배, 1.9배 길었으나, 수면위에 드러난 3번째 절간은 저수위와 거의 같은 수준을 보였다. 저수위재배에서 엽장과 엽폭이증가되었으며, 통도조직이 작고 절단면의 줄기두께는 담수에 비해 21.4% 두껍게 나타났다. 안토시아닌함량은 저수위재배에서 5.8(ACI)로 고수위재배에 비해 2.9배 높았으며, 엽록소 함량도 11.7% 증가되었다. 광합성 활력(Fv/Fm)은 수위별 큰 차이가 없었으나 최대 값(Fm)은 저수위 재배에서 12.8% 상승하였다. 저수위재배에서는 초장이 감소되어 상품수량은 담수에 비해 12.3% 정도 낮게 나타났다. 겨울 재배에서 수확 소요기간은 담수재배에서 피복 후 약 80일 정도로 저수위재배보다 10일 정도 빨랐으나 줄기에서 부정근이 발생되어 상품성이 떨어지는 경향을 보였다. 이상의 결과에서 저수위 재배는 미나리의잎줄기가 청결하고 육질이 치밀하며, 영양성분이 높아 생식용으로 활용가능성이 높은 것으로 판단되지만 수량성은 담수재배에 비해 떨어지는 경향이었다.
Abstract
Water dropwort(Oenanthe javanica) is grown usually in submerged paddy field and is widelyused as additive in foods like Kimchi, fish soup. However, its cultivation in the undersubmerged cultivation has been known to cause the reduction in quality of water dropwortplants mainly due to the presence of dirt and some parasites like leeches and water animals. Thus, this study was conducted to evaluate a wetland cultivation(WLC) of water dropwort plantscompared to the conventional submerged cultivation(SBC) in the greenhouse paddy fieldconditions. WLC and SBC treatments maintained water levels to the depth of less than 5cm andabout 20cm, respectively. Vegetative stem sections were planted in September and plants wereharvested in early April. The results showed that height and yield of water dropwort plantswere higher in SBC than in WLC. Total yield per 10a in WLC was 12.3% lower than in SBC(2.34 vs 2.63 tons). However, the useful quality factors such as vitamin C, inorganic nutrients,chlorophyll, and anthocyanin contents were found to be considerably higher in WLC. That is Ca, K, Mg, and anthocyanin contents in the stem were increased 235%, 6%, 143% and 290%,respectively, compared to those of SBC plants. The length of underground internodes from WLCelongated about 2 times more than that of SBC, resulting in an increase in plant length andadvance in harvest time. On the other hand, water dropwort plants with wetland cultivation canbe produced with good cleanliness and quality, but the cultivation system should be optimizedand developed to get more yield the same as SBC.
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