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2020 Vol.53, Issue 4 Preview Page

Original research article

Assessment of Soil Organic Carbon Fractions and Stocks under Different Farming Practice in a Single Maize Cropping System
Yun Hae Lee1
,
Myung Sook Kim1
,
Seong Jin Park2
,
Hyun Young Hwang3†
,
Seong Heon Kim2†
1Senior Researcher, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Korea
2Researcher, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Korea
3Post-doctoral researcher, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Korea
*hyunyoung1203@gmail.com
**ksh4054@korea.kr
30 November 2020. pp. 626-634
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Abstract

This study investigated the effect of different fertilization practices on SOC fraction and stock changes during maize cultivation. The experiment consisted of four different fertilizations; no fertilization (control), chemical fertilizer (NPK), NPK+residue (NPKR) and NPK+residue+compost (NPKRC). Dissolved carbon (DOC) and nitrogen (DON), hot-water extractable carbon (HWEC) and nitrogen (HWEN) and humic (HA) and fulvic acid (FA) were determine in the 0-10, 10-20 and 20-30 cm soil layers. The yield of maize under NPKRC(13,202 kg ha-1) was higher than Control (2,699 kg ha-1), NPK (10,240 kg ha-1), NPKR (11,352 kg ha-1). In soil properties, pH, EC, OM, TN, Avail. P2O5 were increased when organic matters applied in soil. The content of soil organic carbon (SOC) was higher in order: NPKRC (4.7 g kg-1) > MPKR(3.4 g kg-1) > NPK (2.9 g kg-1) > control (2.2 g kg-1). The highest SOC stock was observed in NPKRC (21.8 kg C ha-1) due to the high SOC and low bulk density. This pattern is same with HA and FA content. In conclusion, application of organic matter increase maize yield, SOC stock and concentration of labile carbon and stable carbon. Therefore, it is recommendable for suitable soil management strategy to improve soil fertility and increase crop yield in upland soil.

HA(humuc acid), FA(fulvic acid), HA/FA and humification rate under different fertilization system. Alphabet indicated significant difference within same soil depth (Duncan’s test, p < 0.05). †Contorl, no fertilization; NPK, chemical fertilizer; NPKR, NPK+Residue; NPKRC, NPK+Residue+Compost.
Keywords
Soil quality
Organic carbon
Carbon fraction
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Information
  • Publisher :Korean Society of Soil Science and Fertilizer
  • Publisher(Ko) :한국토양비료학회
  • Journal Title :Korean Journal of Soil Science and Fertilizer
  • Journal Title(Ko) :한국토양비료학회 학회지
  • Volume : 53
  • No :4
  • Pages :626-634
  • Received Date : 2020-11-04
  • Revised Date : 2020-11-09
  • Accepted Date : 2020-11-10
  • DOI :https://doi.org/10.7745/KJSSF.2020.53.4.626
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