인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Polyacrylic acid (PAA), a synthetic superabsorbent polymer (SAP), enhances the maximum water holding capacity (WHC<sub>max</sub>), soil structural stability, and aeration of soil but may simultaneously affect soil microbiome by altering soil properties. However, its effects on microbial activity under different moisture regimes remain insufficiently understood. We examined the impact of PAA on soil microbial activity in a sand and loam treated with PAA at three concentrations (25, 250, 2500 mg kg<sup>- 1</sup> dry soil) either incubated under constant moisture or subjected to ten drying-rewetting cycles. During incubation, soil WHC<sub>max</sub>, pH, and soil microbial activity via headspace CO<sub>2</sub> and MicroResp assay were measured. PAA increased WHC<sub>max</sub> in both soils, yet its effectiveness decreased in loam under static conditions. Initially, PAA acidified both soils, with pH shifts persisting in sand but dissipating in loam after one week. Drying-rewetting cycles counteracted acidification and partially maintained PAA swelling. In sand, high PAA concentrations consistently suppressed microbial respiration across substrate groups, whereas in loam, microbial responses were modulated by moisture dynamics: drying-rewetting enhanced, while static moisture reduced SIR under PAA treatment. Overall, PAA altered soil microbial activity in a concentration-, soil type-, and moisture-dependent manner, emphasizing the dual role of SAPs in improving soil water retention while potentially impairing microbial-mediated soil functions over time.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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