本文關鍵詞：洱海底泥特性對七種沉水植物生長的影響?　出處：《水生生物學報》2017年02期 　論文類型：期刊論文

  更多相關文章： 富營養(yǎng)化 底泥特性 沉水植物 生態(tài)修復 洱海

【摘要】：為研究洱海底泥特性對沉水植物生長的影響,采用不同比例洱海底泥與湖岸土壤摻混形成五種基質,并分別移栽苦草、黑藻、微齒眼子菜、馬來眼子菜、光葉眼子菜、穿葉眼子菜和狐尾藻,進行為期70d的室外生長實驗,結果表明不同基質對幾種植物的影響具種間差異。(1)在基質為50%深層底泥+50%湖岸土壤(碳、氮、磷含量分別為31.59、0.334和0.095 mg/g)時,苦草、馬來眼子菜和光葉眼子菜的株高最大;基質為100%深層底泥(碳、氮、磷含量分別為37.88、0.803和0.149 mg/g)時,黑藻、微齒眼子菜、穿葉眼子菜和狐尾藻的株高最大;(2)基質為100%深層底泥時,苦草、黑藻、微齒眼子菜、馬來眼子菜和光葉眼子菜生物量增加最多且相對生長速率最大;基質為100%淺層底泥(碳、氮、磷含量分別為77.37、5.691和0.136 mg/g)時,穿葉眼子菜生物量增加最多,相對生長速率最大;狐尾藻在基質為50%淺層底泥+50%深層底泥(碳、氮、磷含量分別為49.27、2.005和0.131 mg/g)時生物量增加最多,相對生長速率最大;(3)基質為100%湖岸土壤(碳、氮、磷含量分別為22.06、0.327和0.231 mg/g)時,7種沉水植物均生長緩慢,生物量增加較少。綜上所述,中營養(yǎng)底泥(碳、氮、磷含量分別為31.59—49.27、0.334—2.005和0.095—0.131 mg/g)更適合沉水植物生長,底泥中過高或過低營養(yǎng)都不利于沉水植物生長。
[Abstract]:In order to study the effect of sediment characteristics on the growth of submerged plants in Erhai Lake, five substrates were formed by mixing the sediment of Erhai Lake with the soil of the lake bank. The outdoor growth experiment was carried out for 70 days. The results showed that the effect of different substrates on several plants had interspecific difference. The substrate was 50% deep sediment and 50% lake shore soil (carbon, nitrogen and phosphorus contents were 31.59, respectively). At 0.334 and 0.095 mg / g, the highest plant height was found in Acanthopsis malayi and Elaeagnus malayi. When the substrate was 100% deep sediment (the contents of carbon, nitrogen and phosphorus were 37.88 mg / g and 0.149 mg / g, respectively), the algae and the microphylla were found. The highest plant height was found in Elaeagnus truncatum and A. vulgaris. (2) when the substrate was 100% deep sediment, the biomass increased most and the relative growth rate was the largest in the three groups: Hydophyllum mongolicum, Chlorophyllum microphylla, Elaeagnus malayi and Elaeagnus auriculata. When the substrate was 100% shallow sediment (carbon, nitrogen and phosphorus contents were 77.37 mg / g and 0.136 mg / g, respectively), the biomass increased most and the relative growth rate was the highest. When the substrate was 50% shallow sediment and 50% deep sediment (carbon, nitrogen and phosphorus contents were 49.270.005 and 0.131mg / g respectively), the biomass increased the most. The relative growth rate is the highest; 3) when the substrate was 100% lakeshore soil (the contents of carbon, nitrogen and phosphorus were 22.06 mg / g and 0.231 mg / g, respectively), the growth of seven submerged plants was slow. In conclusion, the contents of carbon, nitrogen and phosphorus in medium nutrient sediment were 31.59-49.27, respectively. 0.334-2.005 and 0.095-0.131 mg / g) were more suitable for submerged plant growth, but too high or too low nutrition in the sediment were not conducive to the growth of submerged plants.
【作者單位】： 武漢大學資源與環(huán)境科學學院;中國科學院水生生物研究所東湖湖泊生態(tài)系統(tǒng)試驗站;
【基金】：國家“十二五”水體污染控制與治理重大專項洱海項目第四課題(2012ZX07105-004)資助~~
【分類號】：X52;X173
【正文快照】： 水體富營養(yǎng)化已成為嚴峻的環(huán)境問題,受到了全世界的廣泛關注。水體富營養(yǎng)化會使水質惡化,導致水生植被衰退乃至消亡,水生態(tài)系統(tǒng)遭到破壞,生物多樣性降低,引發(fā)一系列生態(tài)環(huán)境問題。沉水植物不僅能夠對水體和底泥中的氮、磷和難降解有機污染物進行吸收、轉化,合成自身物質,對富

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