不同沉水植物对沉积物磷迁移转化的影响

选择了微齿眼子菜(Potamogeton maackianus A.Benn .)、穗花狐尾藻(Myriophyllum spicatum L .)和金鱼藻(Ceratophyllum demerswn L .)3种沉水植物,在温室模拟研究了不同沉水植物对湖泊沉积物磷迁移转化的影响.研究结果表明,随着培养时间的延续微齿眼子菜和穗花狐尾藻对沉积物NaOH-P有明显的吸收和转化作用,分别吸收和转化了36.9%和33.2%,而金鱼藻对沉积物NaOH-P的影响不显著;各处理随着植物的生长,由于根系的吸收作用,沉积物中Olsell-P发生了从非根际→根际→沉水植物的迁移过程,其中微齿眼子菜和穗花狐尾藻更为明显.因此,微齿眼子菜和穗花狐尾藻对沉积物磷释放的控制作用更为明显.

Effects of different submerged macrophytes on migration and transformation of phosphorus in sediments

Effects of three submerged macrophytes, Potamogeton maackianus A. Benn., Myriophyllum spicatum L. and Ceratophyl-lum demersum L. on migration and transformation of phosphorus in Sediments were investigated in the greenhouse. The results indicated that NaOH-P have been absorbed and transformed obviously by Myriophyllum spicatum and Potamogeton maackianus along with the continuation of culture time, the contents is 36.9% and 33.2%, while the impact of Ceratophyllum demersum is not too obvious; With the growth of submerged macrophytes, the Olsen-p of each treatment occurs migration process, which is from non-rhizosphere to rhizosphere to submerged macrophytest, this is because of absorption of the root, of which Potamogeton maackianus and Myriophyllum spicatum are more obvious. So, the effects of control phosphorus releasing by Potamogeton maackianus and Myriophyllum spicatum in sediments are more obvious.