阿拉善荒漠区豆科植物共生固氮资源初步研究  

Resource of Symbiotic Nitrogen Fixation of Legumes in Alashan Desert

作　　者：王卫卫[1] 胡正海[1] 

机构地区：[1]西北大学生命科学学院,陕西西安710069

出　　处：《水土保持通报》2001年第5期30-33,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目 (39670 0 1 7)

摘　　要：对阿拉善荒漠区不同生态条件下栽培与野生的 2 0属 5 5种豆科植物结瘤固氮状况进行了调查。新发现有 15种豆科植物的结瘤状况是Allen文献中未见记载的 ,该区豆科植物种的结瘤率为 94.8% ,其根瘤形态大多数为圆形、棒状、指状 ,形态较为规则 ,白色、黄色者居多。乙炔还原活力测定表明 2 4.6 %为无效根瘤 ,乙炔还原活力小于 1μmol/ (g·h) ,占检测总数的 45 .9% 。The nodulation and nitrogen fixation of major cultivated and wild legumes dispersed over 20 genera. There were 55 species be studied in Alashan desert region. Among them, 15 species have not been reported yet in Allen's 'The Leguminoaes'. The results showed that 94.8% leguminous plants can nodulate in natural environment. The shapes of nodules of these plants were circular, ellipse or cudgel, and most of them were white, yellow and brown in color. There were 77 samples of nodules be detected with the method of acetylene reduction. There were 24.6% of these nodules samples be ineffective for nitrogen fixation. Activities of nitrogen fixation in nodules varied little, all of them were low, and 45.9% of them be under 1μmol/g·h C 2H 4. The cause of low actions in Alashan desert region were discussed.

关 键 词：豆科植物 根瘤 共生固氮 阿拉善荒漠 

分 类 号：S154.381[农业科学—土壤学] S144.5[农业科学—农业基础科学]