水生高等植物马来眼子菜和金鱼藻的初级生产率(黑白瓶法)

PRIMARY PRODUCTION RATES OF AQUATIC MACROPHYTES POT AMOGETON MALAIANUS AND CERATOPHYLLUM DEMERSUM, DETERMINED BY "LIGHT-DARK BOTTLE" METHOD

用黑白瓶测氧法测定了水生高等植物马来眼子菜(竹叶眼子菜,Potamogeton malaianus)和金鱼藻(Ceratophyllum demersum)的初级生产。按单位鲜重或干重表示的毛生产率,马来眼子菜为0.43—1.50mg O_2/g FWt.h(3.76—13.03mg O_2/g DWt.h);金鱼藻为0.44—0.45mg O_2/g FWt.h(5.12—5.27mg O_2/g DWt.h)。净生产率则分别为0.15—1.44mg O_2/g FWt.h(1.31—12.51mg O_2/g DWt.h)和0.08—0.25mg O_2/g FWt.h(0.93—2.95mg O_2/g DWt.h)。讨论了测定时的样品重量和光照强度对生产率的影响。

The primary production rates of aquatic macrophytcs potamogeton malaianus and ceratophyllum demersum were measured by 'light-dark bottle' oxygen method. The gross primary production rates on the basis of unit fresh or dry weight for P. malaianus are 0.43—1.50mg O_2/g FWt. h (3.76—13.03rag O_2/g DWt. h) ,and for C. demersum O.44—0.45mg O_2/g FWt. h(5.12—5.27mg O_2/g DWt. h). The net production rates are 0.15—1.44mg O_2/g FWt. h(1.31—12.51mg O_2/g DWt. h) and 0.08—0.25rag O_2/g FWt. h(0.93—2.95mg O_2/g DWt. h) respectivly. The effects of sample weight and light intensity on the measurement of production rate were discussed.