English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

There are serious problems with degradation of  Suaeda salsa  ( S. salsa ) in Liaohe estuary wetland, Liaodong Bay, Northeast China, which may be mainly caused by the high nitrogen runoff of the upstream ecosystem. This study investigated the effect of nitrogen addition on the nitrogen transformation of  S. salsa  and soil by  15 N labeling technology and the oxidative stress to  S. salsa , thereby exploring the cause of the degradation. The dry weight (by 45.2%–67.3%) of  S. salsa  and the abundance of ammonium monooxygenase (amoB) (by 62%–75%) gene in soil decreased under high concentration of nitrogen conditions. The dissolved organic nitrogen (DON) (by 3%–14.2%) and total nitrogen (TN) (by 75%–89.7%) content in soil increased with increasing nitrogen addition. The hydrogen peroxide (by 5.9%–14.6%) and malondialdehyde (MDA) (by 9.6%–14.7%) content of  S. salsa  increased with increasing nitrogen addition. Therefore, high concentration of nitrogen not only decreased the biomass of  S. salsa  but also caused the waste of nitrogen source. High concentration of nitrogen weakened the nitrification of soil microorganisms and caused oxidative stress to  S. salsa . The addition of high concentration of nitrogen was evidenced to be one of the main reasons for the degradation of  S. salsa  in the present study.

Nitrogen metabolism and antioxidant system responses of Suaeda salsa to nitrogen addition