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本文阐述了稀土复合固氮菌剂中稀土元素增效作用的试验结果。表明稀土元素对８种固氮菌菌体的增殖，固氮活性和激素等次级代谢产物的产生，在１００～３００ｍｇ（ＲＥ＿２Ｏ＿３）／ｋｇ￣（－１）培养液浓度范围内有较明显的促进作用，稀土元素与氮、磷、钾大量元素和微量元素复合，可呈现出明显的加合效应。试验表明，稀土与大量，微量元素的适当配比，不仅可促进作物种子发芽，改善作物的产量构成因素，提高作物产量，而且还可保证固氮菌剂产品质量、避免传统菌肥施用时前期肥效不稳、菌剂中菌体增殖缓慢等问题。
In this paper, the experimental results of rare earth elements synergism in rare earth composite azotobacter were described. The results showed that the production of secondary metabolites such as nitrogen and nitrogen, and the production of secondary metabolites such as hormones were significantly enhanced by rare earth elements in eight kinds of Azotobacter species, and the production of secondary metabolites was obviously promoted in the concentration range of 100-300 mg (RE 2 O 3) / kg -1 , Rare earth elements and nitrogen, phosphorus and potassium elements and trace elements complex, showing a significant additive effect. The results showed that proper ratio of rare earth to large amount of trace elements can not only promote the germination of crop seeds, improve crop yield components, increase crop yield, but also ensure the quality of products of nitrogen-fixing bacteria and avoid pre-fertilization Instability, bacterial proliferation slow bacteria and other issues.