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Decomposition Characteristics and Seedling Growth of Common Reed (Phragmites australis) by Salt Concentration in Saemangeum Reclaimed Land

새만금 간척지에서 염농도에 따른 갈대(Phragmites australis) 유묘 생장 및 분해 특성

  • Oh, Yang-Yeol (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration,) ;
  • Kim, Sun (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration,) ;
  • Ryu, Jin-Hee (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration,) ;
  • Lee, Su-Hwan (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration,) ;
  • Lee, Jung-Tae (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration,) ;
  • Bae, Hui-Su (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration,) ;
  • Kim, Young-Joo (Department of cadastre & Civil engineering, Vision College of Jeonju,) ;
  • Kim, Kil-Young (Institute of Environmentally-Friendly Agriculture, Chonnam National University)
  • 오양열 (농촌진흥청 국립식량과학원) ;
  • 김선 (농촌진흥청 국립식량과학원) ;
  • 류진희 (농촌진흥청 국립식량과학원) ;
  • 이수환 (농촌진흥청 국립식량과학원) ;
  • 이정태 (농촌진흥청 국립식량과학원) ;
  • 배희수 (농촌진흥청 국립식량과학원) ;
  • 김영주 (전주비전대학교 지적토목학과) ;
  • 김길용 (전남대학교 농화학과)
  • Received : 2019.07.04
  • Accepted : 2019.11.18
  • Published : 2019.12.31

Abstract

Common reed (Phragmites australis) is widespread in reclaimed land and wetland habitats. Every year, the common reed produces extensive colonies by means of underground rhizomes and ground-surface stolons. From an agricultural point of view, the common reed's large biomass is a good material for supplying organic matter. However, it has not yet been studied in terms of seedling production, transplanting conditions, and decomposition characteristics in reclaimed land. Seeds were harvested from the native common reed in Saemangeum, South Korea, the previous year and stored on an open field. The seeds were sowed in the greenhouse at the beginning of April. Common reed decomposition was studied from June to September, with the use of coarse mesh (5 mm) stem litterbags, on three samping dates and with five replicate packs per sample. These packs were dug in five soil condition (low-salinity topsoil, subsoil, high-salinity topsoil, subsoil, paddy topsoil) to 0.2 m and 0.4 m depth. The highest germination rate of common reed seeds was observed in non-salt solution, but the exhibited germination rate was 70% at 9.38 dS m-1. The plant height of young reed decreased steadily with increasing salinity, but leaf number did not decrease by 9.38 dS m-1. The survival rate of the two-year-old reed was 83.3%, which was 35% higher than that of the one-year reed. The transplant success rate was 0% in the no vinyl mulching in the soil, but the first year and second year seedlings survived rates were 63% and 83.3%, respectively, in vinyl mulching. Common reed decomposition rates were faster low salinity than high salinity. All nutrient contents were found to fluctuate significantly with time by soil conditions. We also need to study the growth rate of reed transplanting seedlings by soil moisture contents and the comparison of degradation in common reed tissues.

Acknowledgement

Supported by : 농촌진흥청

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