Salt Removal from Soil by Winter and Spring Cultivation of Tall Fescue and Italian Ryegrass in Saemangeum Reclaimed Tidal Land

Abstract

Creating grasslands and cultivating forage crops on reclaimed tidal land in winter and early spring can contribute to improving soil physicochemical properties, reducing fine dust, and increasing feed self-sufficiency. Ryegrasses that adapt well to reclaimed land include tall fescue (Festuca arundinacea Schreb.) and Italian ryegrass (Lolium multiflorum Lam.), which are a cool-season perennial and a winter annual, respectively. To evaluate the salt uptake by winter crops and the soil desalinization, tall fescue and Italian ryegrass were grown twice for 3 years on Saemangeum reclaimed tidal land. The nutrient uptake and dry matter yield of crops were low in reclaimed tidal land compared to inland agricultural land, reflecting the nutrient-poor condition of the reclaimed tidal land. The crops removed 6.4 -10.3 kg ha -1 , 9.8 -12.5 kg ha -1 , and 4.1 -12.2 kg ha -1 for Ca, Mg, and Na per winter cultivation, respectively. Soil salinity significantly (P < 0.05) decreased in Italian ryegrass cultivation plot compared with control and tall fescue cultivation plots, reflecting salt removal by Italian ryegrass which was higher in salt uptake than tall fescue. These results suggest that creating grassland and cultivating forage crops on reclaimed tidal land in winter and early spring can contribute to soil desalinization along with the supply of forage containing high concentrations of minerals.

Spatial Variations in Salinity and Sodicity of Reclaimed Tideland Paddy Soils in Coastal Areas of Southwestern Korea

“…Though RTLs are responsible 22% of national rice production in South Korea, there are increasing social pressures on the use of RTLs for upland crops such as forage (Bae et al, 2021;Yun et al, 2021) and other cereal crops (Lee et al, 2021a(Lee et al, , 2021bOh et al, 2022) due to reduced rice consumption. Therefore, it is necessary to investigate the salinity status of RTLs for assessment of the suitability of RTLs for the cultivation of upland crops (Jeong et al, 2020).…”

Agricultural Water Salinity of Reclaimed Tidelands in Southwestern Coastal Areas of South Korea

“…따라서, 습해 우려가 없고, 재배기간 동안 주기적인 관개로 일시적 제염이 용이한 벼 (Oryza sativa L.)를 주로 재배하고 있다 (Park et al, 2022). 하지만, 최근 쌀 소비량 감소 등에 의해 간척지 밭 작물 재배 필요 성이 증가하고 있어, 간척지 토양에서 사료작물 (Jang et al, 2020;Bae et al, 2021;Yun et al, 2021), 서류 (Lee et al, 2021a), 곡류 (Lee et al, 2021b;Oh et al, 2022) 등 다양한 작물 재배를 위해 토양 염농도 관리 기술 개발에 대한 연구 가 진행되고 있다 (Jeong et al, 2020;Seo et al, 2022).…”

Conversion Factors for Electrical Conductivity of 1:5 Soil-Water Extracts to Saturated Paste of Reclaimed Tideland Soils are Affected by Sand Contents

“…우리나라 농경지의 약 11.7%를 차지 하는 간척지도 입지 특성에 의한 염해 가능성이 높아서 (Lim et al, 2020), 염해를 회피하고 주곡인 쌀 생산을 위해 밭 작물에 비해 내염성이 높은 벼를 주로 재배하고 있다 (Jeong et al, 2020;Lim et al, 2020). 하지만, 쌀 과잉 생산에 따 른 간척지 밭 작물 재배에 대한 정책적 요구가 증가하고 있어 간척지 염농도 모니터링과 그에 따른 작물 재배 관리가 더욱 중요해지고 있다 (Ryu et al, 2021;Seo et al, 2021;Yun et al, 2021;Lee et al, 2022).…”