作　　者： ; ; (莫家勇）;

机构地区： 暨南大学

出　　处： 《应用与环境生物学报》 2016年第2期320-325,共6页

摘　　要： 以恢复沉水植物为主要手段在浅水富营养化湖泊修复中得到广泛应用,但修复后水质差异很大,可能与沉积物特征有关.暨南大学南湖是浅水富营养化湖泊,在削减外源负荷后,实施了沉水植物恢复等修复工程.本研究选择具有不同水质的区域,采集水样与沉积物,分析沉积物NH4Cl-P(弱结合态磷)、Fe-P(铁结合态磷)、Al-P(铝结合态磷)、Bio-P(细菌可利用性磷)、Ca-P(钙结合态磷)和Ref-P(残渣磷)6种形态的磷,并检测水质差异,以探讨生态修复对沉积物磷形态及水体磷浓度的影响.结果显示,沉水植物较丰富的2号点沉积物密度显著高于沉水植物较少的1号点,2号点沉积物中Fe-P、Al-P和Ref-P含量较高,沉积物磷最大释放潜力(P-MSP)为4.87 mg/L,大幅高于1号点的2.58mg/L,然而2号点水体磷浓度却低于1号点,1号点水体的总磷、颗粒态磷、总溶解性磷和溶解活性磷浓度分别为2号点的1.29倍、1.11倍、1.17倍和1.14倍,水质较2号点差.本研究说明沉水植物能抑制沉积物中磷的释放,提高沉积物对磷的滞留能力,从而降低水体磷含量,改善水质. Re-establishment of submerged plants is widely used in restoration of eutrophic shallow lakes, with water quality varying significantly, which may be related to sediment characteristics. This research aimed to study the effects of ecological restoration on the sediment phosphorus form and the water phosphorus concentration in a shallow lake. The South Lake in Jinan University is a shallow eutrophic lake which was restored by recovering submerged plants after reducing external loading. This research selected sampling sites with different water quality and collected water and sediment samples. Sediment phosphorus was analyzed using a sequential extraction scheme as six forms of NH4Cl-P（loosely sorbed phosphorus）, Fe-P（iron boundphosphorus）, Al-P（aluminum bound phosphorus）, Bio-P（bioavailable phosphorus）, Ca-P（calcium bound phosphorus） and Ref-P（refractory phosphorus）. The results showed that sediments density was significantly higher in Site 2 which had more abundant submerged plants than Site 1. The Fe-P, Al-P and Ref-P content in sediments and P-MSP（Phosphorus Maximum Solubilization Potential） were higher in Site 2（4.87 mg/L） than in Site 1（2.58 mg/L）, whereas the phosphorous concentration of water was lower in Site 2 than in Site 1. The concentration of TP, PP, TDP and SRP in Site 1 was 1.29 times, 1.11 times, 1.17 times and 1.14 times higher than in Site 2, respectively. These findings indicate that submerged plants can inhibit the release of phosphorus from sediments and increase the phosphorus retention by sediments, and thus reduce phosphorus concentration in lake water.

关 键 词： 浅水湖泊 生态修复 沉水植物 沉积物磷形态 磷浓度 改善水质

领　　域： [环境科学与工程] [环境科学与工程]