池塘微囊藻生态环境调研与水华防抑试验

AN INVESTIGATION ON MICROCYSTIS ECOLOGICAL ENVIRONMENT AND EXPERIMENT ON PREVENTION AND RESTRAINT OF WATER BLOOM IN PONDS

通过宏观调查、系统测定和有关试验，分析了池塘微囊藻及其生态环境，并对该藻水华的预防和抑制进行了探讨。有微囊藻水华的池塘占到宏观调查池塘总数的50％以上。水华出现时间一般是6月至9月，这些池塘里的鲢、鳙鱼生长不良。系统测定中，探讨了池塘微囊藻生态环境，以及微囊藻生物量占浮游植物量的百分比（MPB％），分别与水中三态氮、有效磷等含量的关系。防抑试验启示，通过适当加大生石灰用量，并采用施肥培水等方式，对预防微囊藻水华的形成有效。微囊藻水华盛期，用药物和追肥抑制法加以控制为好。

This paper studied the Microcystis and its ecological environment in pond through the methods of macroscopic investigation,systematical determination and related experiment.At the same time,we discussed prevention and restraint of water bloom. It has been found that the ponds with Microcystis bloom had a percentage of more than 50% in total amount,and the period of its exisence is from June to September. In sunh ponds the Silver Carp (Hypophtha lmichthys Molitrix)and the Big Head (Aristichthys nobilis) can not grow well.Another aim of this paper was to research the relationship of the percentage of Microcystis biomass to phytoplankton (MPB% ) with dosage of quickline (Ca ) .nitrogen (NO3- N· NO2-N·NH3-N) .effective phosphorus etc,respectively.The experiment showed us that it was effective to prevent the formation of the bloom,with the help of increasing the amount of clearing ponds quickline properly and manuring water. It was the best way to control Microcystis by using the method of the medicine and additional manure when Microcystis was prosperous.