Yuan Qing-Ye, Xie Zong-Qiang, Yang Lin-Sen, Xiong Gao-Ming, Li Zhao-Jia, Fan Da-Yong
Ying Yong Sheng Tai Xue Bao. 2014 Aug;25(8):2229-37.
A total of 10 annuals and perennials of herbaceous species were investigated in reservoir riparian region of Three Gorges Reservoir. The correlations between the plants' nutrient release rate and the substrate composition and structural matter were studied under flooding condition. The decomposition rates of different species differed substantially, with the maximum of Alternanthera philoxeroides (decomposition rate constant k = 0.0228 d(-1)) and the minimum of Microstegium vimineum (k = 0.0029 d(-1)). There was no significant difference in k between annuals and perennials. There was no significant difference in nitrogen and phosphorus contents between annuals and perennials. Paspalum paspaloides and Bidens pilosa released more nutrients into the water than the other species. A. philoxeroides had a higher potential to release nitrogen while it had little effect on water phosphorus compared with the other species. Total N, P contents in the water were negatively correlated with the plants' decomposition rate, initial C content, C:N ratio, lignin:N ratio, and positively correlated with initial contents of K, Ca and N in plants.
对三峡水库消落带的10种一、二年生草本植物和多年生草本植物进行了研究。研究了水淹条件下植物养分释放速率与基质组成和结构物质之间的相关性。不同物种的分解速率差异很大，其中空心莲子草的分解速率最大（分解速率常数k = 0.0228 d(-1)），而虉草的分解速率最小（k = 0.0029 d(-1)）。一、二年生植物和多年生植物的k值无显著差异。一、二年生植物和多年生植物的氮、磷含量无显著差异。雀稗和鬼针草向水中释放的养分比其他物种更多。与其他物种相比，空心莲子草释放氮的潜力更高，而对水体磷含量影响较小。水体中总氮、总磷含量与植物分解速率、初始碳含量、碳氮比、木质素氮比呈负相关，与植物中钾、钙、氮的初始含量呈正相关。
