微囊藻毒素产生过程中磷素行为与作用研究

Effect of Phosphorus on the Production of Microcystin

通过培养实验考察了微囊藻生长过程中磷素的吸收利用情况,研究了可溶解性正磷酸盐对产毒微囊藻生长状况及几种不同磷形态在不同浓度下对微囊毒素产率的影响.结果表明,可溶性反应磷浓度的增加可以促进微囊藻生长,磷浓度为0.55mg.L-1更适宜微囊藻生长,不超过0.55 mg.L-1的磷对微囊藻产毒有促进作用,无磷时产毒率最低,而高于0.55 mg.L-1的磷对微囊藻产毒有抑制作用.磷酸钾、磷酸氢二钾和磷酸二氢钾三种无机磷形态对藻毒素产生过程的影响无显著性差异,但与有机磷形态β甘油磷酸钠相比影响较显著.

Effect of phosphorus on the production of microcystin was researched.The effects of soluble reactive phosphorus（SRP） on the growth of cells and on the production of Microcystin were studied.In addition,the efficiency of four different phosphorus compounds was researched.The results showed that microcystin increased with the increase of SRP,and c（TP）= 0.55 mg·L-1 was the best growth concentration.When c（TP）≤0.55 mg·L-1,the microcystin production increased with the increase of phosphorus concentration and was the lowest without phosphorus.Moreover,when c（TP）0.55 mg·L-1,the microcystin was restrained by the content of phosphorus.At the same time,the effects of three inorganic substance of different phosphorus forms（K3PO4,K2HPO4 and KH2PO4） were no significant difference,but their effects on the production of microcystis were larger than organic phosphorus of sodium β-glycerophosphate（GP）.