白音花水库冰下水生维管束植物的研究

白音花水库冰下有菹草，扇叶水毛莨，聚草及金鱼藻等几种水生维管束植物存活，其生物量变动在１０－３７６０ｇ／ｍ＾２，以菹草居绝对优势（占有草区面积８０％以上），其次为聚草、金鱼藻，而扇叶水毛莨仅零星分布。通过黑白瓶测定，单位时间每克水草产氧量大小依次为菹草，扇叶水毛莨，聚草及金鱼藻，相应的各自光合偿点分别为１００ｌｘ，１７５ｌｘ，１６０ｌｘ及１５０ｌｘ。

Observation on Hydrophilic Fibrovascular Plants Living Under Ice of Baiyinhua Reservoir

Some hydrophilic fibrovascular plants living under the ice of Baiyinhua reservoir such as Potamogeton crispus, Myriophyllum spicatum,Ceratophyllum demersum,Batrachium bungei were observed.The biomass of these plants varied from 10 to 3760 g / m2,and according to the area occupied by each of the plants their order was as follows:Potamogeton crispus>Myriophyllum spicatum >Ceratophyllum demersum >Batrachium bungei.The result of test with black-white bottle showed that Potamogeton crispus gave the greatest amount of oxygen (1 g of hydrophilic plant per unit time), followed by Batrachium hungei,Myriophyllum spicatum, Ceratophyllum demersum accordingly.The supplementary point of photosynthesis is 100 1x,175 1x,160 lx and 150 lx,respectively.