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自从1888年荷兰人首先发现固氮的根瘤菌,至今已有90多年了。在近百年内,固氮,这个奇妙的生物现象,引起许多科学家的兴趣。近年,固氮微生物的研究成果,不仅对农业作出了贡献,而且在节能、环保及遗传工程等方面将起重大作用。工业上用哈伯法生产氮肥,需要高温、高压,消耗大量的能源。由于能源危机,氨的价格不断上涨,使生物固氮更显得必要。据报道,自生固氮菌每年每公顷固定大气氮素10—25公斤(在亚热带地区每年每公顷可达50—100公斤)。共生固氮微生物与寄生固
It has been more than 90 years since the Dutch first discovered nitrogen-fixing rhizobia in 1888. In nearly a hundred years, nitrogen fixation, this wonderful biological phenomenon, has aroused the interest of many scientists. In recent years, the research results of nitrogen-fixing microorganisms have not only contributed to agriculture, but also played a significant role in energy conservation, environmental protection and genetic engineering. Habitat industrial production of nitrogen fertilizer, need high temperature and pressure, consume a lot of energy. As a result of the energy crisis, the price of ammonia is constantly rising, making biological nitrogen fixation even more necessary. It has been reported that autotrophic Azotobacter fixes 10-25 kg of atmospheric nitrogen per hectare per year (up to 50-100 kg per hectare per year in subtropical regions). Symbiotic nitrogen fixing microorganisms and parasitic solid