논 토양에서 유기물원 투입에 따른 벼 수량과 토양유기탄소 축적 효과
Effect of Different Type of Organic Matter Application on Rice Yield and Soil Organic Carbon Stock in Paddy Soil
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초록
This study evaluated the effects of organic material inputs on rice productivity, soil chemical properties, and organic carbon (SOC) accumulation in paddy soils. The results demonstrated significant increases in rice yield, SOC, and SOC stock. Among the treatments, the NPKCC treatment exhibited the highest yield (712.6 kg 10a-1) and SOC stock (42.5 Mg C ha-1), along with increased exchangeable cation content due to the higher cation levels, such as K and Ca, in compost. While rice straw, with its high C/N ratio, decomposed slowly and favored long-term carbon storage, cattle and swine manure composts decomposed relatively faster, providing enhanced nutrient supply and boosting crop productivity. In summary, the application of organic matter to paddy soils not only promotes crop growth but also enhances SOC storage, contributing to carbon sequestration in agricultural soils. However, excessive application of organic matter can leave unabsorbed nutrients in the soil, potentially leading to negative environmental impacts. Therefore, it is recommended to adhere to standard application rates that consider soil and agricultural conditions. Proper organic matter application is expected to improve rice productivity and soil physical and chemical properties, as well as contribute to climate change mitigation efforts aimed at achieving carbon neutrality.
Abstract
This study evaluated the effects of organic material inputs on rice productivity, soil chemical properties, and organic carbon (SOC) accumulation in paddy soils. The results demonstrated significant increases in rice yield, SOC, and SOC stock. Among the treatments, the NPKCC treatment exhibited the highest yield (712.6 kg 10a-1) and SOC stock (42.5 Mg C ha-1), along with increased exchangeable cation content due to the higher cation levels, such as K and Ca, in compost. While rice straw, with its high C/N ratio, decomposed slowly and favored long-term carbon storage, cattle and swine manure composts decomposed relatively faster, providing enhanced nutrient supply and boosting crop productivity. In summary, the application of organic matter to paddy soils not only promotes crop growth but also enhances SOC storage, contributing to carbon sequestration in agricultural soils. However, excessive application of organic matter can leave unabsorbed nutrients in the soil, potentially leading to negative environmental impacts. Therefore, it is recommended to adhere to standard application rates that consider soil and agricultural conditions. Proper organic matter application is expected to improve rice productivity and soil physical and chemical properties, as well as contribute to climate change mitigation efforts aimed at achieving carbon neutrality.
참고문헌 (26)
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