PubMed系统检索方法实践与思考

MEDLINE 数据库是美国国立医学图书馆(缩写为 NLM)MEDLARS 系统中最大的一个数据库。它收录了70余个国家从1966年起至今的近9万余条生物医学文献记录。PubMed(网络地址:http://www.ncbi.nlm.nih.gov/PubMed/)是实现 MDLINE 检索的“入口”系统。它主要分基本检索(Basic Search)和高     

Survival of the biocontrol agents Brevibacillus brevis ZJY-1 and Bacillus subtilis ZJY-116 on the spikes of barley in the field

INTRODUCTION Soil-borne pathogens, including Pythium spp. and Fusarium spp., cause significant yield losses in horticulture and agriculture crops (Mao et al., 1997). Current practices for controlling plant diseases are based largely on disease resistant crops, cultivation management in fields and application of synthetic pesticides (Elizabeth and Emmert, 1999). Biological control using antagonistic microbes to reduce the use of chemical pesticides in a system of integrated plantdisease …