石漠化地区野生多花木蓝根瘤资源调查与分析

为充分发挥豆科植物在生态恢复与重建中的作用，调查了贵州省境内石漠化部分地区的野生多花木蓝根瘤资源.结果表明：隶属于干热河谷南亚热带季雨林生态区的野生多花木蓝根瘤菌及内生细菌资源较为丰富；野生多花木蓝的共生结瘤率只达50%左右，根瘤全部着生于寄主的侧根及须根上，大小可达0.5~3.0mm；12株根瘤菌分布在6个属10个种，其中慢生根瘤菌属（Bradyrhizobium）的分布频率最高41.67%，慢生根瘤菌属的B.japonicum和伯克霍尔德菌属Burkholderia bacterium的发生频率最高16.67%；16株根瘤内生细菌分布在4个属11个种，其中芽孢杆菌属（Bacillus）的分布频率最高43.75%，芽孢杆菌属的B.megaterium的发生频率最高31.25%.

Investigation and analysis of root nodule resources of wild Indigofera amblyantha in rocky desertification areas

In order to give full play to the role of leguminous plants in ecological restoration and reconstruction, the root nodule resources of wild Indigofera amblyantha in the rocky desertification region of Guizhou province were investigated. The results showed that the resources of rhizobia and endophytic bacteria of wild Indigofera amblyantha were abundant in southern subtropical seasonal rain forest ecological zone in the dry and hot valley; the symbiotic nodulation rate of wild Indigofera amblyantha was only about 50%, and all the nodules were on the lateral roots and fibrous roots of the host, 0.5~3.0mm in size; 12 rhizobia strains were distributed in 10 species of 6 genera, of which the distribution frequency of Bradyrhizobium was the highest in frequency 41.67%, and the frequencies of occurrence of B.japonicum of Bradyrhizobium and B. bacterium of Burkholderia were the highest in frequency 16.67%; 16 endophytic bacteria strains were distributed in 11 species of 4 genera, of which the distribution frequency of Bacillus was the highest in frequency 43.75%, and the frequency of occurrence of B.megaterium of Bacillus was the highest in frequency 31.25%.