四种水生植物各器官的氮、磷积累效应分析

Analysis of Nitrogen and Phosphorus Accumulation in Different Organs of Four Plants

选取景观河道水生植被构建中试区的4种优势水生植物——芦苇、菖蒲、香蒲和狐尾藻,从10月初至12月初分别对各植物不同器官的N、P积累量进行了分析。结果显示4,种植物不同器官的N、P含量差异显著,其中狐尾藻的TN含量最高(为28.3 g/kg)、菖蒲茎叶的TP含量最高(为3.1 g/kg);由4种植物各器官的N、P积累量可知,芦苇、菖蒲、香蒲和狐尾藻的最佳收割时间分别为10月1、1月初1、1月中旬和11月中旬。结合各种植物的种植密度和面积,通过收割4种优势植物可回收59.13 kg氮和8.76 kg磷。

Four dominant hydrophytes, Phragmites communis, Iris pseudacorus, Typha angustifolia and Myriophyllum verticillatum L. were used for water purification in landscape river in a pilot test area. The accumulation amounts of N and P in different organs of the above-mentioned plants were analyzed from Oct. to Dec. 2008. The results show that a wide range of N and P content exists in different organs, with the highest TN content of 28.3 g/kg in Myriophyllum verticillatum L. and the highest TP content of 3.1 g/kg in the stem and leaf of Iris pseudacorus. According to the accumulation amounts of N and P in different organs of Phragmites communis, Iris pseudacorus, Typha angustifolia and Myriophyllum verticiua- tum L., their best harvest time are Oct., early Nov., mid-Nov, and mid-Nov. According to planting density and area of each hydrolyte, 59.13 kg N and 8.76 kg P can be recovered by harvesting the four dominant hydrophytes.