| 摘要: |
| 采用磷分级分离法对在杭州西湖采集的柱状泥样进行了磷分级提取.结果发现:HCl-rP即钙矿磷占据了西湖底泥总磷含量的30%-70%,其余依次为NaOH-rP(16%-40%)和NH4Cl-rP(0.6%-10%);活性磷由NaOH-rP和NH4Cl-rP构成,占总沉积磷的20%-40%.各磷分级组分和活性磷的垂直分布与总磷基本一致,含量随泥层深度的降低逐级增加,在10-30cm处形成峰值,但表层的蓄积量又出现逐层下降的趋势. |
| 关键词: 杭州西湖 底泥 磷分级 |
| DOI：10.18307/20010308 |
| 分类号: |
| 基金项目:杭州市园林文物局资助 |
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| Profiles of Phosphorus Fractions in the Sediments of West Lake, Hangzhou |
|
XU Jun
|
|
West Lake Authority, Hangzhou 310000, P. R. China
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| Abstract: |
| A 70cm-sediment core was collected from West Lake, an eupert rophic lake, Hang zhou, P.R.China.Samples were studied by the fraction procedure of Hieltjies & Lijklema (1980) to obtain the phosphorus fractional profiles.In the sediment, the largest partof phosphorus (30%-70%)was bound to calcium, while Fe & Al bound P (NaOH-rP)and loosely absorbed P (NH4Cl-rP)holding about 16%-40% and 0.6%-10% separately;labile phosphorus comprised of 20%-40% of the particulate phosphorus at the time of deposition.The vertical distribut ion of P fractions and labile phosphorus were similar with that of total phosopho rus.In the deep partof sediment the contents increased with the decrease of depth;the peaks all appeared in the layers of between 10-30cm;while in the upper layers a decline with depth was presented. |
| Key words: West Lake (Hangzhou) sediment phosphorus fraction |
