吐尔吉山水库养殖季细菌数量动态及其鱼产力的研究

A STUDY ON BACTERIA I’OI’ULATION DYNAMICS IN CULTURAL PERIOD AND FISH PRODUCTIVITY IN TUER.IISHAN RESERVOIR

对吐尔吉山水库养殖季细菌数量测定表明：细菌数波动在０．２６×１０＾－６－１８．６３×１０＾６ｃｅｌｌｓ／ｍｌ，高峰期出现在８－１０月，水库有草区细菌数明显高于无草区浮游生物，ＣＯＤ、ＮＨ７－Ｎ及ＰＯ４＾３－－Ｐ与细菌之间均无明显相关性。细菌数在水库表、底水层未见显著差异。养殖季细菌的平均世代时间为５２ｈ，日生长常数０．３８，细菌生产量１．５９ｍｇ／Ｌ·ｄ，占浮游植物初级产得的２７％。

A study on bacteria population dynamics in the cultural period and fish productivity in Tuerjishan reservoir was carried out.The results showed that the amount of bacteria was 026×106～1863×106 cells/ml,peaked in the period from August to October,The bacteria population in the water body with macrophyte grow was notably larger than that in the water body without macrophyte grow.There were not significant correlation between bacteria numbers and plankton biomass、COD、NH+4N and PO34P concentrations.There were not significant differences between the amount of bacteria in the upper and bottom water layer.The average generation time of bacteria in the cultural period was 52h.the daily growth constant was 038. The bacterial production was 159 mg/L·d,which was 27 percent of the phytoplankton primary production,and could provide 476g/m3 fish product.