硅酸盐细菌促进玉米生长的生理机制  

Physiology Mechanism of Growth- Promotion for Silicate Bacteria on Corn

作　　者：占新华[1] 蒋廷惠[1] 徐阳春[1] 谭卫华[1] 

机构地区：[1]南京农业大学资源与环境学院,江苏南京210095

出　　处：《农业环境科学学报》2003年第6期736-739,共4页Journal of Agro-Environment Science

摘　　要：采用土培与水培试验相结合的方法研究了硅酸盐细菌促进玉米生长的生理学机制。结果表明,硅酸盐细菌可以增加玉米的生物量和含水量;叶片中叶绿素的含量比对照高20%以上。硅酸盐细菌还能提高植物体内的硝酸还原酶(NRA)和ATPase的活性,促进植物对N素的吸收和利用。硅酸盐细菌处理可降低介质中的pH,从而有利于介质中养分的活化与迁移。Little has been known about physiology mechanism for the silicate bacteria capable of promotion corn growth. The present study using both soil and hydroponic cultures aimed to elucidate the promoting mechanism of silicate bacteria on plants in physiology. The results showed that silicate bacteria increased biomass and water content of corn. The chlorophyll content in corn leaf treated with silicate bacteria was 20% more than that of CK. We also found that the activity of NRA and H+ - ATPase both in corn leaf were promoted by using silicate bacteria and N uptake and utilizing in corn increased. This may be explained that silicate bacteria can decrease pH Value in the media, resulting in enhancement of activity and transport of nutrients.

关 键 词：硅酸盐细菌 玉米 生长发育 生理机制 生物量 含水量 养分迁移 

分 类 号：S513[农业科学—作物学]