摘要
用^(60)Coγ射线辐照文蛤幼贝,研究其对文蛤生长及抗病性的影响。A组预试验结果表明:低剂量^(60)Coγ射线辐照对促生长有效,高剂量辐射抑制了文蛤生长。B组正式试验辐照剂量(低剂量)3.23×10-7～25.80×10-7C/kg。低剂量辐射试验结果表明:46d后,试验组平均壳高及平均体重均高于对照组,分别增加15%～21%和16%～26%;276d后,试验组的平均壳高较对照组增加17%～23%,且试验组文蛤的抗病性远优于对照组。6.45×10-7～19.35×10-7C/kg低剂量为促进文蛤幼贝生长、提高抗病性的有效剂量范围。
Juveniles of Meretrix meretrix Linnaeus were treated with ^60Co γ-rays radiation in order to study effects on their growth and resistance. The research was designed into two parts named A and B, both of which were composed of one blank group and five test groups . After cultured in the sea for 46 days, A showed that low - dose ^60Coγ -ray radiation was good for promoting growth, while high -dose radiation of 95.46 × 10^-7 C/kg to 2363 × 10^-7 C/kg restrained the juveniles＇growth . Therefore, suitable doses ranged from 0 ×10^-7 C/kg to 25.80 × 10^-7 C/kg were selected to design B, and the juveniles were cultured for 46 and 276 days respectively. B showed average height and average weight of five test groups irradiated by ^60Co γ- ray were higher than blank group after 46 days cultured, and the two indexes were increased by 15% -21% and 16% -26% respectively. Continued to be cultured for 276 days in the sea, test groups were increased by 17% -23% , and irradiated test groups＇resistance excelled the blank group which was not irradiated. The juveniles were irradiated by ^60Co γ-ray ranged from 6.45×10^-7 C/kg to 19.35 × 10^-7 C/kg, which effect the growth and resistance greatly. Consequently, the suitable dosage of irradiation to juveniles was 6.45 × 10^-7 C/kg - 19.35 × 10^-7 C/kg.
出处
《水生态学杂志》
北大核心
2008年第6期146-150,共5页
Journal of Hydroecology
基金
南通市科技计划项目(L3006)
