论文部分内容阅读
栽培豆科绿肥,是培养土壤肥力,促进农业增产的重要措施之一,豆科绿肥培肥地力的机理,已为近百年来的研究所阐明。其主要作用在于豆科作物借助根瘤菌共生固氮。因此,绿肥作物的固氮量问题引起了众多学者进行研究。1902年 Hopkins 通过温室和田间试验的结果,得出了一个著名的结论。即:妥善接种根瘤菌的豆科植物,其整个植株的氮素大致有三分之二为根瘤菌从空气中固定,三分之一来自于土壤,这一结论至今
The cultivation of leguminous green manure is one of the important measures to cultivate soil fertility and promote agricultural productivity. The mechanism of fertilization of legume green manure has been elucidated for nearly a century. Its main role is that leguminous crops symbiotic nitrogen fixation with rhizobia. Therefore, the nitrogen fixation of green manure crops caused many scholars to study. In 1902, Hopkins reached a famous conclusion based on the results of greenhouse and field experiments. That is, proper inoculation of Rhizobia leguminous plants, the entire plant nitrogen is about two-thirds of Rhizobium fixed from the air, one-third from the soil, the conclusion so far