Distribution pattern of main hydrophyte resource in mianyang city .
绵阳市主要水生植物资源分布格局。
Hydrophyte a plant found growing in water or in extremely wet areas .
水生植物：是生长在水中或是极端潮湿的环境中的植物。
The hydrophyte landscape value and purification function .
水生植物的景观价值及净化作用的研究。
The species of hydrophyte for controlling the agricultural non-point source pollution and their mechanism were analyzed . The characteristics and efficiency of different hydrophyte ecological engineering mode were discussed . On this basis , the flow , research emphases and directions of the agricultural non-point source pollution control were proposed .
