%0 Journal Article
%A XIAO Yang
%A ZHANG Xiang
%A WANG Meng
%A DENG Zhi-min
%A LIN Yu-ru
%T Characteristics of δ<sup>15</sup>N of Foliage and Soil at Typical IsletWetland in Poyang Lake
%D 2020
%R 10.11988/ckyyb.20190170
%J Journal of Yangtze River Scientific Research Institute
%P 50-58
%V 37
%N 5
%X To study the characteristics of δ<sup>15</sup>N of foliage and soil at typical islet wetland in Poyang Lake, we took the islet wetland between Benghu Lake and Xiushui River as the research object. We analyzed the relation between foliar δ<sup>15</sup>N and soil δ<sup>15</sup>N at typical section from October to December, 2015 and in April, 2016. We also examined the influence of moisture content of soil and inorganic nitrogen (ammonium nitrogen and nitrate nitrogen) content on foliar δ<sup>15</sup>N and soil δ<sup>15</sup>N. Results demonstrated that foliar δ<sup>15</sup>N of most C3 plants were larger than that of C4 plants. The foliar δ<sup>15</sup>N and soil δ<sup>15</sup>N in wet period were larger than those in drought period; however, in both wet and dry periods, the <sup>15</sup>N was more enriched in foliage than in soil. Ammonium nitrogen is the major inorganic nitrogen in the wetland soil, accounting for 87.43%, whereas in wetland plants, nitrate nitrogen was dominantly adsorbed. The opening degree of nitrogen cycle in the study area is small, and the soil δ<sup>15</sup>N decreased with the increase of available nitrogen but increased with the rising of soil water content. There is a significant positive correlation between foliar δ<sup>15</sup>N and soil δ<sup>15</sup>N, and foliar δ<sup>15</sup>N is mainly affected by soil’s nitrogen content and nitrogen isotope fractionation.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20190170