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当前许多国家,由于高产作物品种的推广,氮肥施用水平的提高,加以对产品品质提出更高的要求,因而对钾肥的需要急剧增长,有的国家已感到缺钾的严重性,引起密切的关注。我国当前施肥上也存在氮、钾比例失调的现象。 钾肥资源不足是当前广泛应用钾肥的一个障碍。因此,近年来寻找具有强烈吸钾能力的绿肥作物,利用它把水土中的钾富集起来,是一个颇引起各方重视的解决钾肥的途径。我们在研究红萍固氮时发现,红萍具有较强的富钾能力,但至今未见这方面的研究报道。本研究的目的就是了解红萍富钾的内在可能性,以便为生产利用提供理论依据。
In many countries at present, due to the popularization of the high-yielding crop varieties and the improvement of the application level of nitrogenous fertilizers, higher demands are put on the quality of the products, and the demand for potash fertilizer is rapidly increasing. Some countries have already felt the seriousness of potassium deficiency and have drawn close attention . China’s current fertilization also exists nitrogen and potassium imbalance in the phenomenon. The shortage of potash resources is an obstacle to the widespread application of potash fertilizer. Therefore, looking for a green manure crop with strong potassium absorption capacity in recent years, using it to enrich potassium in water and soil is a way that has drawn great attention from all parties to solve the problem of potash fertilizer. When we studied the fixation of Azolla, we found that Azolla has a strong potassium-enrichment ability, but so far no reports of this aspect have been reported. The purpose of this study is to understand the inherent potential of Hongping potassium, in order to provide a theoretical basis for production and utilization.