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最近,中国科学院植物研究所固氮研究室杜千有、范成英等同志,采用微生物原生质体融合的技术,经过反复试验,成功地使西红柿像豆科植物那样,也能结瘤固氮。这项研究受到人们广泛的重视。氮素是植物生长发育最重要的营养元素之一。空气中氮气占80％,这些氮(N_2)以游离状态存在,化学性质十分稳定,植物不能直接吸收利用。植物能够吸收利用的是铵态氮(NH_4~+)和硝态氮(NO_3~-)。我们通常使用的氮素化肥,就是化工厂利用特殊的催化剂,在高温高压下,将氮气转化为铵态氮或硝态氮的。人工合成氮肥,需要成套的设备,消耗大量的能源,投资昂
Recently, Du Qiangyou, Fan Chengying and other comrades of the Institute of Botany, Institute of Botany, Institute of Botany, Chinese Academy of Sciences, using microbial protoplast fusion technology, after repeated tests, successfully make tomatoes like leguminous plants, also nodulation and nitrogen fixation. This research has received widespread attention. Nitrogen is one of the most important nutrient elements in plant growth and development. Nitrogen in the air accounts for 80% of the nitrogen (N 2) exists in free state, the chemical properties are very stable, plants can not be directly absorbed. Plants can absorb and utilize ammonium nitrogen (NH 4 +) and nitrate nitrogen (NO 3 - -). The nitrogen fertilizers we normally use are chemical plants that use special catalysts to convert nitrogen to ammonium or nitrate at high temperatures and pressures. Synthetic nitrogen fertilizer, need complete sets of equipment, consume a lot of energy, investment expensive