根瘤菌与豆科植物间共生固氮作用的广泛应用,为农业生产提供了丰富的氮素和人、畜需要的蛋白质和脂肪。为了选育适于我省不同地区、不同土壤、不同大豆品种的高效根瘤菌株,几年来对引进的一些新菌株进行盆栽、田间小区、大田生产接种效果试验,获得如下初步结果。一、盆栽试验品种为铁丰18号,在砂培、土培条件下进行试验,供试土壤为沈阳草甸土、棕黄土和朝阳褐色土,供试菌株18个,试验处理有单一菌 Rhizobium and legumes symbiotic nitrogen fixation between the widespread use of agricultural production provides abundant nitrogen and human and animal needs of protein and fat. In order to select efficient strains of Rhizobia strains suitable for different regions, different soils and different soybean varieties in our province, several new strains introduced in the past few years were tested for their inoculation effects in potted plants, field plots and field plots. The preliminary results were as follows. First, the variety of potted plants was Tiefeng No.18, under the condition of sand culture and soil culture, the test soil was Shenyang meadow soil, brown loess and Chaoyang brown soil. The tested strains were single strain