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红萍又名绿萍,学名满江红(Azolla imbracate Nakai)。因其体内生存着一种能够固氮的兰绿藻(Anabaena Variabilis Kuti),在稻田里养萍,可以为水稻提供氮肥。据分析:每百斤千红萍分别含氮素2.769斤,磷素0.346斤,钾素1.182斤。北京地区能否进行稻田养萍?现就调查和试验、谈谈我们的一些看法。一、稻田养萍的好处北京地区七十年代以来,稻麦两熟面积发展到30多万亩,占稻田面积的一半,如果有机
Hongping, also known as Lvping, a scientific name Azolla imbracate Nakai. Anabaena Variabilis Kuti, which is capable of nitrogen fixation, survives in the body and nourishes it in rice fields to provide nitrogen fertilizer to rice. According to the analysis: per kilogram of red duckweed contain 2.769 kg of nitrogen, 0.346 kg of phosphorus, potassium 1.182 kg. Is it possible to carry out rice paddy cultivation in Beijing? Now, on the basis of investigations and experiments, let us talk about some of our opinions. First, the benefits of rice paddies in Beijing since the seventies, rice and wheat area has grown to more than 30 million mu, accounting for half of the paddy area, if the organic