Influence of enhanced ultraviolet-B radiation during rice plant growth on rice straw decomposition with nitrogen deposition.

ABSTRACT: Although straw decomposition is important for ecosystem fertility and carbon balance, influence of ultraviolet-B (UV-B) radiation and nitrogen (N) deposition on this process is unclear. In this study, UV-B-exposed rice straw was decomposed under different N addition treatments for 15 months to investigate the indirect effects of UV-B radiation on straw chemistry and direct effects of N deposition on decomposition. UV-B exposure during rice plant growth changed the rice straw chemical composition, increasing the concentrations of acid-insoluble fraction (AIF), acid-soluble fraction, and UV-B-absorbing compounds. High N content had a negative effect on decomposition of rice straw exposed to enhanced and ambient UV-B radiation. Both AIF concentration and FTIR peak intensities indicated that l

SUBMITTER: Zhou G 

PROVIDER: S-EPMC6162212 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature