莲菜为水生蔬菜作物 ,适宜的水质ｐＨ为 6 .9～ 7.1。1 990年以来 ,部分县、乡相继推广浅水种藕新技术 ,因其技术先进效益高 ,已由零星田块发展为连片种植 ,成为部分县、乡的支柱产业之一。但是 ,随着浅水莲藕种植规模的扩大 ,莲藕叶斑病和腐败病也逐渐蔓延起来 ,加上施肥不科 Lotus is an aquatic vegetable crop with a suitable water quality of pH 6.9 to 7.1.1 Since 1990, some counties and townships have been promoting new technologies for shallow watermelon varieties. Due to their advanced technology and high efficiency, they have been developed from sporadic plots Film planting, as part of the county, one of the pillar industries. However, with the expansion of shallow lotus root cultivation, lotus leaf spot and rot disease also gradually spread, coupled with fertilization is not Section