The article introduces the tube aerator with oars, which is developed from the original one and has comparatively simple structure. The aerator absorbs water mainly from the intermediate level, but also from the lower...The article introduces the tube aerator with oars, which is developed from the original one and has comparatively simple structure. The aerator absorbs water mainly from the intermediate level, but also from the lower level in a pond so as to make water convecting through the three levels and thus improves the aerating efficiency by refreshing the water surface in the pond.展开更多
The task of the fishery machinery mating and its application is one of the research subjects listed in the eomprehensire technical experiments in pond culture of great area with high productivity in Shanghai suburbs.T...The task of the fishery machinery mating and its application is one of the research subjects listed in the eomprehensire technical experiments in pond culture of great area with high productivity in Shanghai suburbs.The researchists have compared various fishery machines, suitble in experiments for the modcl selection, provided a special technical training course for the farmers and carried out a practical experiments in Liantang country, Qingpu county in the meantime in order to accomplish this task well in practical way. On the grounds of these the author put forward in this paper three models of fishery machinery mating with deferent productive scales,such as 500, 750, 1000kg/per mu as net productivity.展开更多
文摘The article introduces the tube aerator with oars, which is developed from the original one and has comparatively simple structure. The aerator absorbs water mainly from the intermediate level, but also from the lower level in a pond so as to make water convecting through the three levels and thus improves the aerating efficiency by refreshing the water surface in the pond.
文摘The task of the fishery machinery mating and its application is one of the research subjects listed in the eomprehensire technical experiments in pond culture of great area with high productivity in Shanghai suburbs.The researchists have compared various fishery machines, suitble in experiments for the modcl selection, provided a special technical training course for the farmers and carried out a practical experiments in Liantang country, Qingpu county in the meantime in order to accomplish this task well in practical way. On the grounds of these the author put forward in this paper three models of fishery machinery mating with deferent productive scales,such as 500, 750, 1000kg/per mu as net productivity.
