Effects of organic matter sources on nitrogen supply potential in arable land

Abstract

: Recently, assessment of nitrogen balance has been required for environmental agriculture. Nutrient management using organic matters in farmlands has been strongly required as a means of extending resource-cycling agriculture and reduction of nitrogen balance. Organic matters-derived nutrients and soil-available nitrogen should be necessarily considered to manage nutrient balance in soil-plant system. In this study, we reviewed the amount of N supply according to types of organic matter such as livestock compost and green manure in arable land. In case of applied livestock compost in soil, nitrogen mineralization was influenced by nitrogen amount of livestock manure and mixed materials. And nitrogen mineralization of green manure in arable land was influenced by types of crop and return period of green manure because of change of C/N ratio. Also, nitrogen supply by organic matter in arable land can be changed by environmental factors such as temperature, moisture in soil. Therefore, nitrogen supply according to C/N ratio of organic matter and analysis method for estimation of soil nitrogen supply availability should be evaluated to set up the nutrient management model.

Dissolution Characteristics of Ammonium and Nitrate in Soil with Bottom Ash from Biomass Power Plant

“…최근 바이오매스 발전소에서 발생하는 저회가 바이오차의 물리 적 특성과 매우 유사하며 (Tomczyk et al, 2020), 이를 바탕으로 저회를 활용한 폐수의 오염물질 제거 또는 중금속 고 정 등 저회를 자원으로써 활용하기 위한 연구가 활발히 진행되고 있다 (Ondrasek et al, 2021;Cui et al, 2022). (Lee et al, 2015). 이에 바이오차를 활용한 토양의 무기태 질소 보유 및 침출에 대한 연구는 많지만 (Ding et al, 2010)…”

Estimation of Nitrogen Mineralization of Organic Amendments Affected by Nitrogen Content in Upland Soil Conditions

“…또한 유기자원의 질소 무기 화율은 토양 깊이 및 시비시기 (Im et al, 2015;Moon et al, 2017)에 따라 달라진다. 이처럼 유기자원 사용시 고려해야 할 요소는 탄소, 질소 및 탄질비 등이 있으나 특히 중요한 것은 유기자원의 질소성분이며 (Ryoo, 2012;Ryoo and Choi, 2012;Lee et al, 2015), 토양 유기물에 함유되 어 있는 양분 중에서 가장 중요한 것은 질소이다 (Chang and Sohn, 2000).…”