非豆科作物在无机氮高度保障的土壤上可增加干物质和氮的产量,豆科作物则因共生固氮作用而使这一效应降低。氮肥缺乏以及由于能源与原料涨价所引起的高昂价格,使得世界许多国家不得不研究共生固氮作用及其过程的作用因素。生物固氮在提高蛋白质报酬,减缓土壤氮枯竭,或者补充土壤氮,以及避免无机氮污染环境方面相当有效。 Non-leguminous crops increased dry matter and nitrogen yields in soils highly inorganic-nitrogen-tolerant and leguminous crops reduced their effects due to symbiotic nitrogen fixation. Lack of nitrogen fertilizer and high prices due to price hikes in energy and raw materials have forced many countries in the world to study the role of symbiotic nitrogen fixation and its processes. Biological nitrogen fixation is quite effective at increasing protein remuneration, slowing the depletion of soil nitrogen, or supplementing soil nitrogen, and avoiding environmental pollution by inorganic nitrogen.