长江口潮滩表层样中分级磷的时空变化

Temporal and spatial change of Phosphorus in superficial sample of Yangzi River estuary

长江河口表层沉积物中各种形态的磷,虽然都是以钙磷有机磷为主,但是,在不同的地点,各种形态的磷随着上覆水的盐度、pH、沉积物的粒度及有机质含量等物理化学性质的不同,都会呈现出一定的变化:可吸附态磷大致为顾路>寅阳>溆浦>崇明东滩;铝磷则是顾路>溆浦>寅阳>崇明东滩;铁磷是顾路>溆浦>寅阳>崇明东滩;钙磷则崇明东滩>溆浦>寅阳>顾路;有机磷是顾路>溆浦>寅阳>崇明东滩;不同季节各点的变化有规律性:可吸附态磷在春季最高,铝磷也基本如此,铁磷则是秋季最高,钙磷变化性不大,有机磷则表现出冬春季节较高的规律。

Ca-P and organic phosphorus in all kinds phosphorus in superficial sample of Yangzi River estuary is major, but all kinds phosphorus are changing in vary spaces and times.Because there are different physical chemical property,including salinity, pH of water and grade of grain,?concentration of organic material of sediment.Dop: gl>yy>xp>cd Alp and Fep:gl>xp>yy>cd Cap:cd>xp>yy>gl Organic Phosphorus:gl>xp>yy>cd And dop .Alp are highest in spring:Fep is highest in autumn :OP is highest in autumn and winter:But Cap have no evident change.