N、P、K在宽叶香蒲人工湿地系统中的分布与积累

Accumulation and distribution of N,P and K in man-made wetland with Typha latifolia

通过对广东省韶关市凡口宽叶香蒲(Typhalatifolia)人工湿地系统的进出水口、土壤剖面及宽叶香蒲、芦苇、茳芏和伴根草等4种主要水生植物体内的N、P、K含量进行分析.结果表明,土壤表层是人工湿地系统营养物质的主要贮藏库.从进水口到出水口,人工湿地土壤中N、P、K含量逐渐增加,而在同一地点,N、P、K的含量随土壤剖面深度增加而递减.N、P、K三种元素在4种被测植物体各组分中的含量变化各不相同.N为叶>凋落物>地上茎>地下茎>根;P为叶>凋落物>根>地上茎>地下茎;K在地下茎及叶中的含量相当高.

Analysis of water, soil and biomass in man-made wetlands populated with Typha latifolia shows that nutrients mainly accumulate in the soil surface layerof. The concentrations of N, P and K in the soil gradually increase with the distance from the wastewater influent, and decrease with the soil section depth. The contents of N, P, K in four kinds of thed etected plauts showed different ： N ： Leaf 〉 wither 〉 aerial stem 〉 subterranean stem 〉 root, P ： a leaf 〉 wither 〉 root 〉 aerial stem 〉 subterranean stem, while the content of K in leases and underground stems is very high.