CAJ | 학술논문

通过田间根瘤调查结合15 N 自然丰度值（δ15 N‰）及叶片（鲜叶、落叶）含氮量测试，分析了10种（品种）胡枝子属植物的固氮效率，综合固氮效率与落叶含氮量指标比较出各胡枝子种的绿地供肥能力，其中绿叶胡枝子（Lespedeza buergeri ）、美丽胡枝子（L ．formosa ）、截叶胡枝子（L ．cuneata ，白花）与二色胡枝子（L ．bicolor‘Yakushima’）四个胡枝子品种生物固氮效率较高，具有较高的肥田效果，适合在上海绿地中大面积推广应用。
통과전간근류조사결합15 N 자연봉도치（δ15 N‰）급협편（선협、락협）함담량측시，분석료10충（품충）호지자속식물적고담효솔，종합고담효솔여락협함담량지표비교출각호지자충적록지공비능력，기중록협호지자（Lespedeza buergeri ）、미려호지자（L ．formosa ）、절협호지자（L ．cuneata ，백화）여이색호지자（L ．bicolor‘Yakushima’）사개호지자품충생물고담효솔교고，구유교고적비전효과，괄합재상해록지중대면적추엄응용。
Based on the survey of field root nodules and the determination of 15 N natural abundance and both fresh and fallen leaves’nitrogen contents,the nitrogen fixation efficiencies of 10 Lespedeza species were evaluated,and the nitrogen supplying powers were compared among the 10 species.The result showed that four Lespedeza species-L .buergeri , L .formosa , L .cuneata ,L .bicolor‘Yakushima’-had a higher nitrogen fixation efficiency and a higher nitrogen supplying power than the other species and were worth large area planting in Shanghai greenland.