为缓解苏芡前期虫、萍及丝状藻类等生物的为害,减少农药用量,积极尝试生物防控、绿色生态种养新技术,探索发现在苏芡定植前后15 d向田中投放规格170～400尾/kg的草鱼,每667 m2放养0.5～1.1 k g,进行萍害和藻类的拦截,成功率可以达到95%以上,且早期无虫害发生.该技术可实现每667 m2减少农药使用2次,同时,节省了捞萍、打药等用工成本,平均每667 m2增收节支399～511元,生态、社会、经济效益十分显著,推广应用前景广阔.
A New Mode of Green,Low-carbon and Ecological Planting and Breeding of Symbiosis between Suzhou Semen Euryales and Grass Carp
In order to alleviate the damage of pests,duckweed and filamentous algae in the early stage of Suzhou semen euryales planting,reduce the amount of pesticides,new technologies of biological prevention and control and green ecological planting and breeding were actively tried.It was found that grass carps with specifications of 170-400 fishes per kilogram and 0.5-1.1 kg per 667 m2 put in the field 15 days before or after planting of Suzhou semen euryales could intercept duckweed and algae,with a success rate of over 95%and no pests occurred in the early stage.This technology could reduce the use times of pesticides twice per 667 m2,at the same time,save the labor cost of fishing duckweed and spraying pesticides,and increase the income and reduce the expenditure by 399-511 yuan per 667 m2 on average.The ecological,social and economic benefits are very remarkable,and the popularization and application prospect is broad.
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