볏짚퇴비 사용이 논토양의 화학성 및 유기탄소 축적에 미치는 영향

• Published in: Korean journal of crop science Vol. 68; no. 2; pp. 90 - 96
• Main Authors: 변지은, Ji-eun Byeon, 김성헌, Seong Heon Kim, 심재홍, Jae Hong Shim, 전상호, Sang Ho Jeon, 이윤혜, Yun Hae Lee, 권순익, Soon Ik Kwon
• Format: Journal Article
• Language: Korean
• Published: 한국작물학회 01.06.2023
• Subjects: application rate; nitrogen uptake; rice straw compost; soil organic carbon; soil organic carbon stock; 농학; rice straw compost; soil organic carbon; application rate; soil organic carbon stock; nitrogen uptake
• ISSN: 0252-9777; 2287-8432

The aim of this study was to investigate the effect of application rate of rice straw compost on soil chemical properties and soil organic carbon stock (SOC stock). The experiments were performed with no fertilizer (NF), inorganic fertilizer (NPK), NPK + rice straw compost 7.5 ton ha -1 (NPKC7.5), NPK + rice straw compost 15 ton ha -1 (NPKC15), NPK + rice straw compost 22.5 ton ha -1 (NPKC22.5), and NPK + rice straw compost 30 ton ha -1 (NPKC30). The SOC and SOC stock were highest in the NPKC30 treatment at 22.8 g kg -1 and 71.2 Mg C ha -1 , respectively. Rice production was in the range of 621.2-654.4 kg 10a -1 in NPKC22.5 and NPKC30 treatments, which was higher than that in the NPK treatment. However, with increase in compost application, the exchangeable K and Ca of the soil increased, and the exchangeable K and Ca were higher than the optimum range in NPKC22.5 and NPKC30 treatments. Excessive application of compost can have negative impacts on the environment, including nutrient accumulation in the soil and water pollution from nutrient runoff. Therefore, applying the standard amount of compost according to the agricultural environment would be appropriate, despite the relatively lower rice production and SOC stock than that observed with the application of 22.5 and 30 ton ha -1 .