作业帮一小段英文,希望大家为我翻译一下~
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一小段英文,希望大家为我翻译一下~
Phosphorus is present in sediments in several chemical
forms (Gonsiorczyk et al., 1998). Thus, prediction of future
internal P-loading requires more than the knowledge on
the total concentration of phosphorus. Soil P-fractionation
has been investigated since 1957 and later applied to lake
sediments to overcome the limited information that total-
P analysis can provide (Zhou et al., 2001). Since then, several
procedures for phosphorus extraction in sediments
have been proposed in order to suit studies of different sediment
mineral phases. (Psenner and Pucsko, 1988; Ruttenberg,
1992; Ruban et al., 1999). These sequential extraction
schemes made possible, in several studies, to characterize
the diverse forms in which P is distributed in sediments,
classified as labile P, reductant P, metal bound P, occluded
P and organic P (Psenner and Pucsko, 1988). These fractions
have been also classified as water soluble P, readily
desorbable P, algal available P or ecologically important
P (Pettersson et al., 1988; Zhou et al., 2001).
Phosphorus is present in sediments in several chemical
forms (Gonsiorczyk et al., 1998). Thus, prediction of future
internal P-loading requires more than the knowledge on
the total concentration of phosphorus. Soil P-fractionation
has been investigated since 1957 and later applied to lake
sediments to overcome the limited information that total-
P analysis can provide (Zhou et al., 2001). Since then, several
procedures for phosphorus extraction in sediments
have been proposed in order to suit studies of different sediment
mineral phases. (Psenner and Pucsko, 1988; Ruttenberg,
1992; Ruban et al., 1999). These sequential extraction
schemes made possible, in several studies, to characterize
the diverse forms in which P is distributed in sediments,
classified as labile P, reductant P, metal bound P, occluded
P and organic P (Psenner and Pucsko, 1988). These fractions
have been also classified as water soluble P, readily
desorbable P, algal available P or ecologically important
P (Pettersson et al., 1988; Zhou et al., 2001).
专业词汇比较多,我参考了一些资料以后,自己翻的,给你作个参考吧.
磷以几种化学形态存在于沉积物里(Gonsiorczyk等,1998).因此,对未来内源磷负荷的预测需要更多的总磷质量浓度方面的知识.对土壤磷的分馏自1957年开始研究,后应用于湖泊沉积物以克服总磷分析只能提供有限信息的缺点(Zhou等.,2001).自此,沉积物中提取磷的几个步骤被提出,以配合对其他沉积物矿相的研究(Psenner和Pucsko,1988; Ruttenberg,1992; Ruban等,1999).这些连续萃取方案在多项研究中使将分布在沉积物里的多种形态的磷特性化,区分为活性磷、还原态磷、金属结合态磷、闭蓄态磷和有机磷,变成了可能(Psenner和Pucsko,1988).这些馏分也会区分成水溶性磷、易解吸磷、海藻有效磷或是具重要生态价值的磷(Pettersson等,1988; Zhou等,2001).
磷以几种化学形态存在于沉积物里(Gonsiorczyk等,1998).因此,对未来内源磷负荷的预测需要更多的总磷质量浓度方面的知识.对土壤磷的分馏自1957年开始研究,后应用于湖泊沉积物以克服总磷分析只能提供有限信息的缺点(Zhou等.,2001).自此,沉积物中提取磷的几个步骤被提出,以配合对其他沉积物矿相的研究(Psenner和Pucsko,1988; Ruttenberg,1992; Ruban等,1999).这些连续萃取方案在多项研究中使将分布在沉积物里的多种形态的磷特性化,区分为活性磷、还原态磷、金属结合态磷、闭蓄态磷和有机磷,变成了可能(Psenner和Pucsko,1988).这些馏分也会区分成水溶性磷、易解吸磷、海藻有效磷或是具重要生态价值的磷(Pettersson等,1988; Zhou等,2001).
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