Optimal Amount and Mixture Ratio of Seeding of the Exotic and Native Plants for Slope Revegetation(II)

사면 녹화용 외래초종과 재래 목·초본식물의 적정 파종량 및 혼파비에 관한 연구(II)

  • Jeon, Gi-Seong (Highway Research Center, Korea Highway Corporation) ;
  • Woo, Bo-Myeong (Dept. of Forest Resources, Seoul National University)
  • 전기성 (한국도로공사 도로연구소) ;
  • 우보명 (서울대학교 산림자원학과)
  • Received : 1999.06.02
  • Published : 1999.06.30

Abstract

This study was carried out to verify results of the nursery seedbeds. From November of 1997 to September of 1998, the artificial banking slopes in the greenhouse of the College of Agriculture and Life Sciences, Seoul National University were seeded with the mixtures of those species. Most of exotic species showed relatively poor development of root as short as 30cm. Also the green weight of root biomass of the native species was more than two times than that of the exotic species. On the other hand, it was found that the exotic species have relatively well-developed fine roots. Thus, it was concluded that the seed-mixture of the native species with long and thick roots and the exotic species with fine roots be the most effective method for topsoil erosion control on banking-slopes. The artificial rainfall system treatment(30mm/hr, 60mm/hr, 100mm/hr) on $30^{\circ}$ banking-slopes did not cause any significant change in the amount of soil loss by erosion. The root system was best developed in the plot of 1,000 seedlings per square meter and it performed well for soil erosion control. Consequently, in the case of seeding of single herbaceous species without mixing any woody seeds, the expected seedlings were 1,000 to 2,000 per square meter.

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