Emulsion prepared under acidic conditions was compared with emulsion prepared under basic conditions.Under acidic conditions emulsion had a small average count rate,emulsion particles grow slowly at the early stage an...Emulsion prepared under acidic conditions was compared with emulsion prepared under basic conditions.Under acidic conditions emulsion had a small average count rate,emulsion particles grow slowly at the early stage and grow quickly at the latter,the Zeta potential was low.However,under basic conditions,those parameters were contrasted.At the same time there was a plateau range in which particles almost would not grow.展开更多
对东方水韭(Isoёtes orientalis H.Liu et Q.F.Wang)2个自然样地(浙江松阳叔婆湾和小烂湖)生境土壤主要营养成分含量进行了比较分析,并对叔婆湾样地水体pH值进行了测定,在此基础上,对导致东方水韭濒危的土壤及水体因素进行了讨论。结...对东方水韭(Isoёtes orientalis H.Liu et Q.F.Wang)2个自然样地(浙江松阳叔婆湾和小烂湖)生境土壤主要营养成分含量进行了比较分析,并对叔婆湾样地水体pH值进行了测定,在此基础上,对导致东方水韭濒危的土壤及水体因素进行了讨论。结果显示:东方水韭叔婆湾样地的土壤有机质、总氮、速效磷、速效钾和总铁离子(包括Fe3+和Fe2+)含量分别为102.7 g.kg-1、3.1 g.kg-1、18.1μg.g-1、15.0μg.g-1和221.6μg.g-1;小烂湖样地土壤中上述营养成分的含量分别为122.8 g.kg-1、4.8 g.kg-1、13.7μg.g-1、7.1μg.g-1和240.0μg.g-1。小烂湖样地土壤中有机质、总氮和速效钾含量显著或极显著高于叔婆湾样地,2个样地间速效磷和总铁离子含量差异不显著,但2个样地土壤中速效钾含量极低、总铁离子含量丰富。叔婆湾样地中上、中、下游水体的pH值分别为pH6.35、pH6.53和pH6.49,略呈中性。分析结果表明,东方水韭2个自然样地的土壤均为有机质、总氮、速效磷以及总铁离子含量较为丰富且速效钾含量较低的土壤类型,土壤中速效钾极度缺乏和水体中性化很可能是限制东方水韭种群发展的重要环境因素。展开更多
基金The project of National Natural Science Fund,China(41006059)Special Fund for Strategic Pilot Technology Chinese Academy of Sciences,China(XDA11040301)Special Fund for Natural Gas Hydrate
文摘Emulsion prepared under acidic conditions was compared with emulsion prepared under basic conditions.Under acidic conditions emulsion had a small average count rate,emulsion particles grow slowly at the early stage and grow quickly at the latter,the Zeta potential was low.However,under basic conditions,those parameters were contrasted.At the same time there was a plateau range in which particles almost would not grow.
文摘对东方水韭(Isoёtes orientalis H.Liu et Q.F.Wang)2个自然样地(浙江松阳叔婆湾和小烂湖)生境土壤主要营养成分含量进行了比较分析,并对叔婆湾样地水体pH值进行了测定,在此基础上,对导致东方水韭濒危的土壤及水体因素进行了讨论。结果显示:东方水韭叔婆湾样地的土壤有机质、总氮、速效磷、速效钾和总铁离子(包括Fe3+和Fe2+)含量分别为102.7 g.kg-1、3.1 g.kg-1、18.1μg.g-1、15.0μg.g-1和221.6μg.g-1;小烂湖样地土壤中上述营养成分的含量分别为122.8 g.kg-1、4.8 g.kg-1、13.7μg.g-1、7.1μg.g-1和240.0μg.g-1。小烂湖样地土壤中有机质、总氮和速效钾含量显著或极显著高于叔婆湾样地,2个样地间速效磷和总铁离子含量差异不显著,但2个样地土壤中速效钾含量极低、总铁离子含量丰富。叔婆湾样地中上、中、下游水体的pH值分别为pH6.35、pH6.53和pH6.49,略呈中性。分析结果表明,东方水韭2个自然样地的土壤均为有机质、总氮、速效磷以及总铁离子含量较为丰富且速效钾含量较低的土壤类型,土壤中速效钾极度缺乏和水体中性化很可能是限制东方水韭种群发展的重要环境因素。
