东湖大型围隔及围栏内植物群落和水质的变化_马剑敏.pdfVIP

J ournal of Plant R esour ces and Environment　 　　　 东湖大型围隔及围栏内植物群落 和水质的变化X 马剑敏XX　严国安　任　南　罗岳平　李益健 ( 武汉大学环境科学系, 武汉 430072) 摘要　 为恢复湖泊 水生植被, 初步研 究了建在武 汉东湖的 大型围隔、围栏中 的植物群落 和水质的 季节动 态以及两 者间的关系, 结果 表明: 围 隔、围 栏中, 植 物生物量 明显增加, 漂浮植 物易定 植, 水 绵和刚 毛藻易发生, 植物 群落结构难 以自然地得 到优化; 养鱼对水 生维管束 植物的生长 和恢复不 利; 水中总氮与总磷的变化具一致性, 它们与水生 植物的生物量间关 系密切, 围隔 中水生植物的良 好生长使水的总氮、总磷浓度明显降低。 关键词　大型围隔; 围栏; 植被恢复 The variations of phytocommunities and water quality in large-scale enclosure and corral in East Lake, Wuhan　M a Jian-M in, Yan Guo -A n, Ren Nan, Luo Yue-Ping , Li Yi-Jian ( De- partment of Enviro nm ental Science, W uhan University , Wuhan 430072) , J . Plant R esour . Environ. 1996, 5( 3) : 35～40 In o rder to restore aquatic vegetation in lakes, the seasonal dy nam ics o f phytoco mmunities and w ater quality and the relations betw een them in the larg e-scale enclosure and corral w hich w ere built in East Lake, Wuhan were preliminar ily studied. T he results show ed that in the enclo sure and corral, the biom ass of aquatic plants increased o bv io usly, the flo ating plants settled dow n and repro duced easily , the Sp ir ogy ra and Cladop hora gr ew easily , the structure o f phy toco mmunities w as difficult to be impr oved naturally . The fish culture w asn′ t beneficial to g row th and restoratio n of aquatic v ascular plants. The v ar iation o f TN ( total nitro gen) w as consistent w ith TP ( total phosphor us) in w ater. T here w ere close relations a- mong TN , T P and biomass o f aquatic plants. Because aquatic plants g rew w ell in the enclo- sure, the T N and TP in w ater decreased obviously . Key words　large-scale enclosure; co rral; veg etation restor ation 东湖( E 114°23′, N 30°33′) 位于武汉市东北郊, 面积 27. 899 km 2, ( 20. 5 m 高程) , 平均水 〔〕 深 2. 21 m