The inhibition ofoverwintering cyanobacteria recovery in Taihu Water by gamma-ray irradiation from 60Co was studied, the effects of different absorbed doses and additives (methanol, sodium carbonate) on inhibition were investigated. Gamma-ray irradiation significantly inhibited the recovery of overwintering cyanobacteria, the increasing of absorbed dose enhanced the inhibition effect. The ratio of chlorophyll a, chlorophyll b and phycocyanin, in water with the absorbed dose of 5kGy and 40 days culture, were 8.66％、 16.8％ and 17.2％ to that in control sample, the recovery of overwintering cyanobacteria was inhibited. 0.5％ CH3OH、 0.22mmol/LNa2CO3 additives restrained irradiation process, with the same absorbed dose and culture time, the chlorophyll a, chlorophyll b and phycocyanin concentration in water sample contained additives were higher than that in control sample.%采用60Co衰变产生的Y-射线辐照太湖原水,研究其对水中越冬蓝藻复苏的抑制,分析不同吸收剂量和添加物(甲醇、碳酸钠)对抑制效果的影晌.结果表明,Y-射线辐照能有效抑制太湖水中越冬蓝藻的复苏,吸收剂量越大,抑制蓝藻复苏的效果越好.吸收剂量为5kGy的水样,培养40d,水中叶绿素a(Chl-a)、叶绿素b(Chl-b)和藻蓝素(PC)含量分别为对照样的8.66%,16.8%和17.2%,抑制了越冬蓝藻的复苏.0.5%甲醇和0.22mmol/LNa:CO3添加物抑制了辐照过程,与不含添加物水样相比,相问吸收剂量下,相同培养时间内,含添加物水样中Chl-a,Chl-b和PC浓度较高.
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