In the ecological management and resources development of Lake Wuliangsuhai , harvesting submerged vegeta-tion by mechanization method can decrease the accumulation of internal nutrient salts ; meliorate the water environment and transfer nutrient salts of nitrogen and phosphorus to achieve the purpose of eutrophication management and resources development .Design of rubbing type submerged vegetation desalting machine can decrease the amount of nutrient salts on the submerged plants after harvesting , improve the dainty of submerged vegetation feedstuff .Desalting submerged vegeta-tion shows that removal effect for about 9%-22 %moisture , 720 r/min rated rotation speed and 16 mm size of vibration sieve pore is the best and maximum removal rate reaches to 85 .45%, its desalting efficacy is better than beater pulveriz-er.Grey system theory model was set up to estimate desalting rate , average error is -1.66%, which lays theoretical foundation for its technology parameter optimization .
desalting machinesubmerged vegetation feedstuffdesalting ratedesalting efficacygrey model