摘要
土壤酸碱度是影响根瘤菌形成及固氮的一个主要因素,在南方酸性土壤地区,苜蓿生长的主要限制因素是固氮作用降低,筛选耐酸苜蓿根瘤菌用于接种具有十分重要的生产意义。本研究以9份根瘤菌株为研究对象,在不同的pH条件下培养研究其菌落直径,同时在不同的pH条件下分别与紫花苜蓿品种接种研究其结瘤数,结果表明:YNCY006菌株耐酸性最强而YNCY007菌株耐酸性最差,酸性土壤条件下GT13R紫花苜蓿分别与YNCY006或YNCY008接种是最佳结瘤的共生系统。
Soil pH is a main factor affecting the nodule formation and nitrogen fixation. Less nitrogen fixation limited the growth of alfalfa of acid soils in the South of China. It is particularly important that we select and anti-acid nodule and inoculate it. Colony diameters of nine strains and nodule number of alfalfa inoculated by theirs were studied in different acidic conditions. The result showed that YN- CY006 strain was the strongest for acid resistant, but YNCY007 strain was the weakest. For nodula- tion, GT13R alfalfa inoculation by YNCY006 or YNCY008 strain was the best symbiosis system in the acid soil.
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期56-60,共5页
Journal of Yunnan Agricultural University:Natural Science
基金
国家自然基金项目(31060324)
"西部之光"人才培养项目
"十二五"农村领域国家科技计划(2011BAD17B03)
关键词
紫花苜蓿
苜蓿根瘤菌
耐酸性
共生系统
alfalfa
Rhizobium meliloti L.
acid tolerance
symbiosis system
