메뉴 건너뛰기
소속 기관 / 학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
고객센터 ENG
주제분류

논문 기본 정보

저자정보
출처
Wiley Advanced Science 13(9)
오류 신고하기
표지

검색

    초록·키워드

    Grassland degradation disrupts microbial nutrient cycling, yet the role of nitrogen (N) limitation in regulating soil organic carbon (SOC) dynamics during restoration remains poorly understood. Here, 10 years of active (sowing of seeds of native plants) and passive restoration (sand barrier protection) in degraded grasslands on the Qinghai-Tibetan Plateau are compared. Restoration impacts are assessed by integrating microbial metabolic traits such as stoichiometry-based nutrient limitation and C use efficiency (CUE<sub>ST</sub>) with SOC fractionation, which considers both POC and MAOC). Active restoration reduces microbial N limitation by 44-71%, driving a 291-467% increase in SOC stocks, from 0.81 to 3.15 kg m<sup>-2</sup> in topsoil and 0.54 to 3.08 kg m<sup>-2</sup> in subsoil. It also reduces CUE<sub>ST</sub> by 54% in topsoil and 34% in subsoil, boosting POC by 483-557% and MAOC by 621-1,071%. MAOC dominates SOC accumulation, exceeding POC by 2.3-7.2 times. The CUE<sub>ST</sub> reduction aids POC transformation into MAOC, stabilizing SOC storage. In contrast, passive restoration slightly reduces N limitation by 36-39% and CUE<sub>ST</sub> by 10-23%, but failed to enhance C fractions or SOC stocks due to persistent nutrient constraints. The findings demonstrate that alleviating microbial N limitation by active restoration is critical for stabilizing SOC through MAOC accumulation.

    본문·목차

    최근 본 자료 전체보기