Effects of Ammonia Nitrogen and Sediment Nutrient on Growth of the Submerged Plant Vallisneria natans. Issue 12 (30th June 2014)

• Record Type: Journal Article
• Authors: Zhu, Zhengjie; Yuan, Hezhong; Wei, Ying; Li, Pengshan; Zhang, Peihua; Xie, Dong
• Editors: An, Shu‐Qing; Shao, Hong‐Bo; Chen, Yu‐Shun
• Is Part Of: Clean. Volume 43:Issue 12(2015:Dec.)
• Page Start: 1653
• Page End: 1659
• Publication Date: 2014-06-30
• Subjects: Aquatic macrophytes -- Catchment -- Eutrophication -- Submerged plant -- Vegetation restoration; Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.201300878
• Languages: English
• ISSNs: 1863-0650

Abstract

Abstract : In order to investigate the impacts of ammonia nitrogen concentration and the necessity of dredging, five levels of ammonia nitrogen including 0, 2, 4, 8, and 16 mg L −1 and two levels of sediments nutriments (high and low) were treated. The total biomass, leaf, root, and flower biomasses were selected as the growth indicators, while total chlorophyll (i.e., chl‐a and ‐b), malondialdehyde (MDA), and free proline as subsidiary physiological index. When ammonia‐N contents of the water column were 8–16 mg L −1, the total biomass of Vallisneria natans in the first harvest is higher than those in the second harvest, and the total chlorophyll concentration, MDA and free proline of the plants became significantly low. It indicates that high ammonia nitrogen (>8 mg L −1 ) of the water column inhibit the growth of V. natans . The total biomass, the total chlorophyll concentration of plants in the high nutrient sediment is higher than those in the low nutrient sediment, suggesting that high sediments nutrient promote the growth of V. natans . Therefore, using V. natans for water ecological restoration, the water should meet the ammonia nitrogen content of <8 mg L −1 . Moreover, dredging eutrophication sediment is probably not necessary. Abstract : The findings of the paper indicate that high ammonia nitrogen (>8 mg L −1 ) of the water column inhibits the growth of Vallisneria natans and high sediments nutrient promotes its growth. When using V. natans for water ecological restoration, the water should meet the ammonia nitrogen contents <8 mg L −1 . Moreover, dredging eutrophication sediment is probably not necessary.