宁夏豆科植物根瘤菌资源调查及其生态分布

通过对宁夏野生及栽培豆科植物结瘤固氮资源的调查,从24属47种豆科植物根部采集到根瘤样品748份,通过调查显示:兴隆山棘豆和单叶黄芪为新发现的豆科结瘤植物;此地区根瘤主要为黄色或褐色,性状以球形和棒状为主,主要着生在侧根;影响宁夏豆科植物结瘤的因素有水分、土壤肥力和植物的生育阶段;根据生长习性、地理分布和利用状况,将宁夏豆科植物根瘤菌资源分为干旱区、山坡草地区和耕地区.

Investigation of rhizobium resources of leguminous plants and their ecological distribution in Ningxia

An investigation was made on the nodule and nitrogen fixation resources of wild and cultivated leguminous plants in Ningxia and 748 nodule samples that belonged to 24 genera and 47 species were collected.The results showed: 1) Oxytropis xinglongshanica C.W.Chang and Astragalus efoliolatus Hand.-Mazz.were the newly-discovered ones capable of setting nodules.2) The most nodules were yellow or brown,spherical or claviform,and grown on lateral roots.3) The water and fertility of soil and the growth stage were important factors that affected the nodulation.4) According to the growth character,distribution and utilization,the rhizobium of leguminous plants in Ningxia is distributed in aridity,mountainous grassland and plantation area.