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http://dx.doi.org/10.17137/korrae.2022.30.1.5

Long-term Application Effects of Soil Amendments on Yield and Soil Properties in Paddy  

Kwon, Soon-Ik (Soil & Fertilizer Management Division, National Institute of Agricultural Science)
Lee, Yun-Hae (Soil & Fertilizer Management Division, National Institute of Agricultural Science)
Hwang, Hyun-Young (Oragnic Agriculture Division, National Institutue of Agricultural Science)
Kim, Sung-Hyun (Soil & Fertilizer Management Division, National Institute of Agricultural Science)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.30, no.1, 2022 , pp. 5-11 More about this Journal
Abstract
This research evaluated the long-term application effects of different soil amendments on yield, dissolved organic carbon, nitrogen and soil organic carbon stock in rice paddy. The experiment consisted of four different fertilizations; Inorganic fertilization (NPK), NPK+Lime (NPKL), NPK+Silicate (NPKS), NPK+Compost (NPKC). There was no significant difference in rice yield between the treatment groups in 1995, but the rice yields in the NPKL and NPKC treatments in 2019 increased by 4.3% and 14.3% compared to NPK. In terms of soil properties, the pH of NPKS(6.7) and NPKL(6.4) in 2019 increased the most compared to the soil pH before experiment(5.2). The organic matter(OM) content from NPKC treatment increased upto 34 and 27 g kg-1 in year of 1995 and 2019, respectively, compared to before the test. In NPKS and NPKL treatment, labile carbon and nitrogen content, used as a soil quality indicator, increased by 1.1-1.9 times over the control. From these result, it is suggested that type and application rate of soil amendment should be determined based on the soil analysis before cultivation for sustainable agricultural environment and productivity.
Keywords
Soil amendment; Long-term experiment; Yield; Soil properties;
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