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红萍是江南稻区稻田的主要肥源之一。我省红萍越夏常因不耐高温和虫害而大批死亡,给二晚养萍造成了一定困难。如果利用红萍有性繁殖进行良种选育和品种复壮,可望找出一条红萍越夏的新途径。红萍的有性繁殖,是在一定的条件下发生的。在红萍舂繁和秋繁时,气温适宜,水肥良好,营养充足,萍体的营养生长和生殖生长就重迭并进。一般在五、六月和十月在枝顶第一叶下部的裂片上常有孢子果出现。红萍
Hongping is one of the main sources of rice in the rice fields in southern China. Hongping summer more often due to high temperature and pest insects and a large number of deaths, to two nights caused some difficulties Ping. If the use of sexual reproduction red clover seed breeding and rejuvenation, is expected to find a new way red summer. Sexual reproduction of Hongping occurs under certain conditions. In Hongfan bustling and autumn, suitable temperature, good water and fertilizer, adequate nutrition, Ping body nutrition growth and reproductive growth overlap. Spores commonly occur on lobes in the lower part of the first leaflet of the branches in May, June and October. Hongping