红萍是稻田的好肥料,国外认为它同固氮鱼腥藻结合性共生可能是水稻生产上潜在的氮源。国内认为由于红萍能固氮,生长快、产量高、肥效好,又可与水稻套养共生,不占一季耕地,因此,它的发展具有无限的前途。近年来,国内外都很重视研究这一生物氮源,但对晚稻田如何合理利用是长期以来没有根本解决的问题。为此,我们想在这方面加以探讨。 Hongping is a good fertilizer for paddy field, which is considered as a potential nitrogen source in rice production. It is believed that Hongping has a very promising future due to its capability of nitrogen fixation, fast growth, high yield, good fertilizer efficiency and symbiosis with rice. In recent years, great attention has been paid to the study of this biological nitrogen source both at home and abroad, but how to reasonably utilize the late rice fields has long been a problem that has not been fundamentally solved. For this reason, we would like to discuss this issue.