相思属(A cacia)树种是速生的热带、亚热带豆科植物。对现在大面积种植的相思树品种——马占相思的根瘤菌进行分离和筛选,获得菌株若干株,对它们的结瘤固氮特性和对马占相思、大叶相思及厚荚相思生长的影响等进行了初步研究。结果表明,无氮条件下接种马占相思根瘤菌,能显著促进这3个树种的株重、株高和生物量的增长;苗圃接种马占相思根瘤菌,马占相思苗高增加27.6%,地径增加14.8%,植株鲜重增加32.6%,结瘤数增加83.8%。 The Acacia species are fast growing tropical and subtropical leguminous plants. A large number of acacia species now planted Acacia species - Rhizobia isolated and screened strains obtained strains of their nodulation and nitrogen fixation and Acacia mangium, Acacia crassicarpa and Acacia growth Conducted a preliminary study. The results showed that inoculation of A. acacia Rhizobia without nitrogen could significantly increase the plant height, plant height and biomass of these three species. The nursery inoculation of Acacia mangium increased the seedling height by 27.6% Soil diameter increased by 14.8%, fresh weight increased by 32.6%, and nodulation increased by 83.8%.