洱海沉水植物碳、氮、磷化学计量学特征

摘要

指出了目前对于沉水植物碳(C)、氮(N)和磷(P)化学计量学的野外研究主要集中平原湖泊,而对于中富营养初期变化的洱海研究鲜见报道,为此,对洱海7种常见沉水植物的C、N和P的化学计量学特征进行了研究,结果表明:洱海沉水植物地上部分C、N和P含量平均值分为:320.6 mg/g、17.6 mg/g、2.84 mg/g;洱海沉水植物地上部分C∶N、C∶P和N∶P比平均值分别为:19.89、129.17、6.51;沉水植物C、N和P含量之间呈显著相关,N与P含量的相关性要大于C与N及C与P含量的相关性.%At present, the study on carbon (C), nitrogen (N) and phosphorus (P) stoichiometry of submersed macrophytes commonly focus on plain lake.However, there is little research onearly changes in the eutrophic Erhai Lake.Thus, we studied seven common submersed macrophytes on their chemometrics features of C, N and P in Erhai Lake.The results showed that: 1) the average contents of C, N and P were respectively 320.6 mg/g, 17.6 mg/G and 2.84 mg/g in the aerial parts of submerged oyster in Erhai Lake.2) The ratio of C: N, C: P and N: P was respectively 19.89, 129.17 and 6.51 in the aerial parts of the submerged plants.3) The contents of C, N and P were significantly correlated with N.But the correlation of N, P content was greater than that between C, N and C, P.