摘要
通过对甘肃中西部地区豆科植物共生固氮资源多样性的调查,共获得豆科植物根瘤样品452份,涉及18个属,30个种,分离得到328株根瘤菌。调查结果显示:(1)本地区豆科植物资源贫乏,但适应性强,大多数都具有抗干旱、耐盐耐碱特性。(2)土壤干旱和土壤高盐浓度是影响根瘤形成的重要限制因子。(3)本地区豆科植物根瘤形状多为棒状、球状,部分为不规则状;颜色为红色、浅褐色、褐色、黄色,部分为白色、黑色。(4)许多豆科植物——根瘤菌共生固氮体系已被广泛应用于防风固沙、防治水土流失及改善生态环境等方面。
452 rhizobium samples were collected from 18 genera and 30 species of legumes according to the investigation in the middle and western areas of Gansu Province, and 328 rhizobium strains were isolated. The results show that the resources of leguminous plants are very scarce, and the growth of rhizobium is related to special ecological condition and topographical features. Especially, drought and high salt concentration are significant factors that limit rhizobium-legume symbiosis. The shape of these nodules is mostly sphericity or stick, and the color is mostly red, sandy beige, brown or yellow. Many kinds of legume have been applied not only to soil and water conservation but also to the improvement of environment in Gansu Province.
出处
《干旱地区农业研究》
CSCD
北大核心
2006年第1期183-186,191,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(30470040)
全国优秀博士学位论文作者专项基金(200254)
教育部新世纪优秀人才支持计划基金
关键词
共生固氮
根瘤菌
多样性
甘肃中西部
symbiotic nitrogen-fixation
rhizobium
diversity
the middle and western areas of Gansu
