【摘要】：為了認(rèn)知沉積物磷釋放對海灣磷負(fù)荷的影響,本文以SMT分級方法分析了大亞灣表層沉積物中磷的形態(tài)結(jié)構(gòu),探討了沉積物磷的釋放潛力的時空性差異及其影響因素。結(jié)果表明,大亞灣沉積物中總磷(TP)的平均含量為429.65×10~(-6),無機(jī)磷(IP)、有機(jī)磷(OP)的平均含量分別為286.57×10~(-6)和143.08×10~(-6),IP占TP的67.83%;IP以酸提取態(tài)磷(HCl-P)為主,HCl-P的平均含量為237.10×10~(-6),堿提取態(tài)磷(Na OH-P)的平均含量為56.13×10~(-6);生物有效磷(OP+Na OH-P)占到總磷的45.63%。大亞灣沉積物磷具有較高的釋放潛力,并呈現(xiàn)出夏季高于冬季,近岸區(qū)域高于灣中心及灣口的變化規(guī)律。相關(guān)性分析表明,沉積物粒徑、氧化還原電位及有機(jī)質(zhì)含量(尤其是浮游藻類的自生有機(jī)質(zhì))對沉積物磷的釋放潛力有較大影響。
[Abstract]:In order to understand the effect of sediment phosphorus release on phosphorus loading in the Gulf, the morphological structure of phosphorus in surface sediments of Daya Bay was analyzed by SMT classification method, and the temporal and spatial differences of phosphorus release potential in sediments and its influencing factors were discussed. The results show that The average content of total phosphorus (TP) in sediment of Daya Bay is 429.65 脳 10 ~ (-6), the average content of inorganic phosphorus (IP), organic phosphorus (OP) is 286.57 脳 10 ~ (-6) and 143.08 脳 10 ~ (-6) IP accounts for 67.83% of TP. The average content of HCl-P in TP is 237.10 脳 10 ~ (-6). The average content of alkaline extracted phosphorus (Na OH-P) is 237.10 脳 10 ~ (-6). 56.13 脳 10 ~ (-6) and bioavailable phosphorus (OP Na OH-P) accounted for 45.63% of total phosphorus. The phosphorus release potential of sediment in Daya Bay is higher than that in winter, and the variation of phosphorus in the coastal area is higher than that in the center of the bay and the mouth of the bay. The correlation analysis showed that sediment particle size, redox potential and organic matter content (especially phytoplankton autogenous organic matter) had great influence on phosphorus release potential of sediment.
【作者單位】： 中國科學(xué)院南海海洋研究所中國科學(xué)院熱帶海洋生物資源與生態(tài)重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)項(xiàng)目(2015CB452901,2015CB452905) 國家自然科學(xué)基金項(xiàng)目(41406128) 中國科學(xué)院戰(zhàn)略先導(dǎo)性專項(xiàng)(XDA11020205)
【分類號】：P736.41;X145

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