Pattern of soil organic matter content in reclaimed tide lands with different reclamation time in Korea

Dr Jin-hee Ryu1, Dr Yang-Yeol Oh1, Dr Su-hwan Lee1, Mr Jae-won Jeong1, Dr jeong-Tae Lee1

1National Institute Of Crop Science, RDA, Wanju-gun, South Korea

In Korea, reclamation projects have been pushed forward to build 135,100ha of reclaimed tide lands from 1965 to 2020. In order to utilize the reclaimed tide lands as competitive farm lands, the government has been pursuing comprehensive development of the reclaimed lands. To provide basic data for rational land-use and soil management, we investigated soil physical and chemical properties for 11 reclaimed tide lands with different reclamation time from 2013 to 2016. Soil analysis results showed that annual mean value of soil EC was in the range of 5.1 to 8.3 dS m-1 and continued to decrease over the years. Average value of soil organic matter(SOM) content of the reclaimed tide lands ranged from 2 to 17 g kg-1 in 2016. The reclaimed tide land with longer years after reclamation tended to have higher SOM content. The estimation equation for the SOM was y = 4.3183e0.08x (R2=0.5196), where y = SOM content, x = years after reclamation. Cation exchange capacity(CEC) increased with the increase of SOM content. The higher SOM content in the reclaimed tide lands with longer years after reclamation was attributed to input of organic matter and growth of roots during crop cultivation. As the years after reclamation had elapsed, SOM had increased but was still far from adequate level for crop cultivation. It was found that management for continuous enhancement of SOM content would be important for efficient agricultural use of the reclaimed tide lands


Biography:

  1. 8 : Ph.D. in Soil Science, Chungnam University
  2. 2 : M.S. in Soil Science, Chungnam University
  3. 2 : B.S. in Agricultural Chemistry, Korea University
  4. 8. 4 ~ Present : Reclaimed Land Agriculture Research Div. National Institute of Crop Science(NICS), RDA, Korea

 

SOIL ORGANIC MATTER

7th International Symposium
Soil Organic Matter

6 – 11 October 2019

Hilton Adelaide

Adelaide, South Australia

Australia

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