Effects of algal bloom on N,P and K contents in Meiliang Bay of Taihu Lake.

Abstract

Abstract: According to the measurements in Meiliang bay between1998～2000,the effects of algal bloom on N,P,and Kcontents were studied. The results showed that the relationship between the Chl a content and temperature was positive. The lowest contents of NH₄⁺-N,TN, and TP were obtained in August and September every year, and their total content was positively related to the Chl a content. The annual change of Kcontent was similar to that of N and P. Compared to the 8 th sampling point,the content of N and Pat 0^th and 6^th sampling point was higher,and P was not the limiting factor. But in other areas,P was the limiting factor. It also proved that Microcystis spp. grew to form water bloom only when Ncontent was between 1～4 mg·L^-1 and TPcontent was between0.1～0.3 mg·L^-1 .

Key words: Chl a, N, P, K, Microcystis spp

CLC Number:

P343.3

YANG Dingtian, CHEN Weimin, JIANG Jing, JI Jiang, CAO Wenxi . Effects of algal bloom on N,P and K contents in Meiliang Bay of Taihu Lake.[J]. Chinese Journal of Applied Ecology, 2003, (6): 969-972.

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