袁家湖三角帆蚌Hyriopsis cumingii最佳育珠水层的试验研究

封闭性育珠水体的各水层的理化和生物学性状不尽相同,因此,育珠蚌必须挂养在“最佳育珠水层”中。封闭型育珠水域具有明显而较稳定的最佳育珠水层。各育珠水域具有各自固有的最佳育珠水层。测定藻类的AGP值能预报该水域的最大浮游植物生物量。根据浮游植物生物量影响的透明度,可得出水域最佳育珠水层的关系式: 最佳育珠水层(cm)=透明度(cm)×0.8

Studies on optimum water layer for rearing pearls (hyriopsis cumingii) in Yuanjiahu Lake

The paper explores that the Hynopsis Cumingii for pearl-rearing have to be hung in the optimum water layer, since the physico-chemical and biological characteristics differ within the depths of water layers in a closed lake such as Yuanjiahu Lake, Hunan Province.The pearlrearing began a hundred years ago, but no reports have been found concerning the optimization of water layers for pearl-rearing in closed lakes.The experiment have obviously shown that there is an optimum water layer of rearing pearl in the closed lake, and the optimum water layers in different waters are relatively unchangeable.The maximum phytoplankton biomass can be predicted by the algae AGP value measured.According to rhe effects of phytoplankton density on transparent degree, the following formula could be drawn out: Optimum water layer of rearing pearl (cm)=Transparent Degree (cm)×0.8