摘要
为了解水体营养物质低限浓度对浮游植物生长的影响,于2006年4月研究了浮游植物在自来水及添加不同浓度氮和磷后的自来水中生长情况.结果表明,在自来水中,浮游藻类仍然能够大量生长繁殖,培养28 d后个体密度可达8.00×104inds.L-1.在添加总氮(TN)浓度分别为0.8,0.4,0.2,0.1,0.05和0.025 mg.L-1的自来水样中,浮游藻类浮游藻类密度分别达到1.69×105,2.81×105,1.19×105,1.03×105,5.88×104和8.12×104inds.L-1.在添加总磷(TP)浓度分别为0.16,0.08,0.04,0.02,0.01和0.005 mg.L-1的自来水样中,密度分别达到1.71×106,7.23×105,5.13×105,5.00×105,3.85×105和3.75×105inds.L-1.藻类密度与添加的TN浓度之间关系为y=-88 650x2+895 456x+26 326,与TP浓度之间关系为y=8×106x+262 582.添加P对藻类生长的影响比N更为显著.控制水体氮磷浓度难以达到控制浮游植物大量繁殖的目的.
Abstract： To find out the effects on the growth of phytoplankton of limiting nutrimental concentration, the growth of phytoplankton in tap water samples with different the concentration of nitrogen and phosphorus is investigated in April, 2006. The results show that, the phytoplankton can grow and reproduce well in tap water with density of 8.00 × 10^4 inds· L^- 1. When the total nitrogen（TN） concentration in the tap water samples were 0.8,0.4,0.2,0.1,0.05 and 0. 025 mg· L^- 1, the phytoplankton densities ecxne to 1.69 × 10^5, 2.81 ×10^5, 1.19 × 10^5, 1.03 × 10^5, 5.88 ×10^4 and 8.12 × 10^4 inds· L^-1 apart. When the total phosphorus（TP） concentration in the tap water samples were 0.16,0.08,0.04,0.02,0. 01 and 0. 005 rng· L^- 1, the phytoplankton densities come to 1.71 × 10^6, 7.23 ×10^5, 5.13 ×10^5 ,5.00 ×10^5, 3.85 × 10^5 and 3.75 ×10^5 inds· L^- 1 respectively. The relationship between phytoplankton density and TN, TP concentration can be described with the regression equations y = - 88 650x^2 ＋ 895 456x ＋ 26 326 and y = 8 × 10^6x ＋ 262 582 respectively. The added TP has more remarkable effects on phytoplankton growth and reproduction than TN has. It is difficult to control the phytoplankton blooms by reducing the concentration of nitrogen and phosphorus in water.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2007年第3期344-347,355,共5页
Journal of Fudan University：Natural Science
基金
国家社科重大基金资助项目(06&ZD024)
