稻田养萍,是自力更生、多快好省解决肥料的重要途径。杂交水稻生育期长,大田插植较稀,本秧少,有的采用宽窄行,封行迟,可充分利用稻行间水面养殖红萍固氮造肥,特别是在杂交中稻、杂交晚稻秧田和杂交中稻大田养萍,不仅可以做追肥,而且还可做基肥,增产效果显著,因此,随着杂交水稻的推广,也为红萍的养殖利用开辟了广阔的前景。 1976年,我们在桂东县杂交中稻示范样板田放养红萍550多亩,对杂交水稻的养萍用萍效果进行了试验,现将结果汇报如下: Rice paddy cultivation, self-reliance, more efficient and more efficient solution to fertilizer an important way. Hybrid rice has a long growing period, field planting is more rare, the seedling less, and some use of narrow and narrow lines, closure of late, you can make full use of paddy field cultivation of red ping nitrogen fertilizer, especially in hybrid rice, hybrid late rice seedling and Hybrid paddy field Tianpingping, not only can be topdressing, but also to do base fertilizer, yield significant results, therefore, with the promotion of hybrid rice, but also for the Hongping breeding and utilization has opened up a broad prospect. In 1976, we planted more than 550 mu of red duckweed in a sample demonstration field of hybrid mid-rice in Guidong County. We tested the effect of ping-pong on the cultivation of hybrid rice. The results are reported as follows: