Effect of Drip Irrigation Level on Soil Salinity and Growth of Broccoli (Brassica oleracea L. var. italica) in Saemangeum Reclaimed Tidal Land

Huisu Bae; Jaebok Hwang; Haksin Kim; Bonil Gu; Inbae Choi; Taeseon Park; Hongkyu Park; Suhwan Lee; Yangyeol Oh; Sanghun Lee; Geonhwi Lee

doi:10.12791/KSBEC.2015.24.4.275

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Effect of Drip Irrigation Level on Soil Salinity and Growth of Broccoli (Brassica oleracea L. var. italica) in Saemangeum Reclaimed Tidal Land 새만금간척지에서 점적관수량이 토양염농도와 녹색꽃양배추의 생육에 미치는 영향

30 November 2015. pp. 275-280

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Abstract

The objective of this study was to investigate the effect of drip irrigation level on soil salinity and growth of broccoli (Brassica oleracea L. var. italica) at the ‘Saemangeum Reclaimed Tidal Land’ from April to June, 2015. Drip irrigation was conducted at 1.5, 3.0 and 6.0mm·day^-1 level for reduction of resalinization in the plastic vinyl house using 10cm spacing drip irrigation tape. At harvesting stage, the average EC of surface soil was 10.9dS·m^-1 for 1.5mm·day^-1, 11.5dS·m^-1 for 3.0mm·day^-1 and 5.1dS·m^-1 for 6.0mm·day^-1 and was significantly reduced by 52~56% in 6.0mm·day^-1 treated plot compared to those in 1.5 and 3.0mm·day^-1 plots. The fresh bud weights of 1.5, 3.0 and 6.0mm·day^-1 treatment plots were 60.9, 129.1 and 371.3g·plant^-1, respectively. The estimated soil EC for 50% yield reduction was 7.6dS·m^-1 and the desalinization depth by drip irrigation was 30~40cm in soil profile. The total amount of drip irrigation water was estimated to be 422mm and the daily drip irrigation level was 6.0mm·day^-1 for the prevention of resalinization during the broccoli growing period at the ‘Saemangeum Reclaimed Tidal Land’. Our results suggested that drip irrigation shows effectiveness on the lowering the soil salinity according to the drip irrigation quantity but it needs more research on this study because dynamics of salts in soil can vary with many factors such as soil physico-chemical properties and seasonal climate.

Keywords

resalinization

salt movement

soil electrical conductivity

본 연구는 새만금 간척지에서 비닐하우스 작물 재배 가능성 검토를 위해 녹색꽃양배추를 대상으로 일일 관수 량을 달리하여 관수량에 따른 토양 염농도 및 생육특성 등을 조사하여 관수량에 의한 재염화 억제효과를 알아보 고자 수행하였다. 수확기의 표토의 평균 토양 EC 는 1.5 및 3.0mm·day^-1 처리구에서 각각 10.9 및 11.5dS·m^-1 였으며 6.0mm·day^-1 처리구에서 5.1dS·m^-1로 1.5 및 3.0mm·day^-1 처리구보다 52~56% 낮게 나타나 점적관수 량에 따른 제염효과를 확인할 수 있었다. 화뢰의 무게는 6.0mm·day^-1 처리구에서 주당 371.3g으로 1.5 및 3.0mm·day^-1 처리구의 60.9g 및 129.1g보다 높은 값을 나타냈다. 50%의 수량감소를 보이는 토양 EC는 7.6dS·m^-1였으며 점적관수에 의한 토양 제염효과는 6.0mm·day^-1 처리에서 30~40cm 깊이까지 나타났다. 따 라서 새만금간척지에서 녹색꽃양배추 재배시 점적관수에 의한 토양 재염화 억제를 위해서는 6.0mm·day^-1 수준의 관수량으로 총 422mm의 물량이 필요할 것으로 예측된 다. 그러나 염류의 이동은 토양 이화학적 특성 및 계절 적 요인 등 여러 가지 환경요인에 영향을 받으므로 간 척지 비닐하우스에서 점적관수에 따른 염류의 이동특성 에 관한 추가적인 연구가 필요할 것으로 판단된다.

키워드

토양전기전도도

염류이동

재염화

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Information

Publisher :The Korean Society for Bio-Environment Control
Publisher(Ko) :(사)한국생물환경조절학회
Journal Title :Protected Horticulture and Plant Factory
Journal Title(Ko) :시설원예ㆍ식물공장
Volume : 24
No :4
Pages :275-280
Received Date : 2015-08-17
Revised Date : 2015-10-23
Accepted Date : 2015-10-27
DOI :https://doi.org/10.12791/KSBEC.2015.24.4.275

Journal of Bio-Environment Control ISSN:1229-4675(Print) 2765-3641(Online) 생물환경조절학회지

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