光温条件和pH对浮萍生长及磷吸收的影响  

Effect of Photon Flux Density and pH on Growth Ability and Phosphorus Removal Efficiency of Two Duckweed Species

作　　者：蔡树美[1] 张震[2] 辛静[2] 周雄飞[2] 钱晓晴[2] 

机构地区：[1]扬州大学生物科学与技术学院,江苏扬州225126 [2]扬州大学环境科学与工程学院,江苏扬州225126

出　　处：《环境科学与技术》2011年第6期63-66,75,共5页Environmental Science & Technology

基　　金：江苏省科技支撑计划(农业)(BE2009378)

摘　　要：试验以长江三角洲地区常见的稀脉浮萍和少根紫萍为研究对象。在Hoagland’s E-Medium营养液进行实验室模拟培养的基础上,研究了光温条件以及pH对两种浮萍生长和磷去除能力的影响。结果表明,在1 500~6 000 lx光照强度范围内,光照越强,两种浮萍的生长和磷去除能力越强;在10~35℃温度范围内,两种浮萍生长和磷去除的最佳气温为25℃,高温和低温对浮萍的生长都有一定的抑制作用,且低温的抑制作用更明显;在pH5~9范围内,稀脉浮萍和少根紫萍生长和磷去除的最佳pH值分别为6.0和5.0,越偏离最佳生长pH值,pH对浮萍生长和磷去除的抑制效果越明显。Effect of photon flux density,temperature and pH on growth ability and phosphorus removal efficiency of Lemna aequinoctialis and Spirodela oligorrhiza,which are common species in Yangtze Delta region,was assessed with laboratory artificial culture experiments using Hoagland＇s E-Medium.Results indicated that the stronger photon flux density was,higher growth ability and phosphorus removal efficiency of duckweeds would become in photon flux density range of 1 500~6 0001x.The optimal temperature condition for duckweeds growth and phosphorus removal was 25 ℃ among temperature from 10 ℃ to 35 ℃.Either low or high temperature would lead to reduce the growth rate of duckweed,and restrain effect of low temperature was more significant.Among pH from 5 to 9,the optimal pH condition for Lemna aequinoctialis and Spirodela oligorrhiza was pH 6.0 and 5.0 respectively.Deviation from the optimal pH value caused a distinct restrain of both growth ability and phosphorus removal efficiency.

关 键 词：浮萍 光照 温度 PH 磷去除 

分 类 号：X703[环境科学与工程—环境工程]