内生固氮菌在水稻上的应用效果研究初报

采用盆栽和田间小区试验,探讨了水稻接种2种内生固氮菌对其生长发育的影响,结果表明:水稻接种内生固氮菌后表现出固氮特性,促进了水稻的分蘖,提高了水稻产量,且Whr50菌株的总体效果要优于Hwo52菌株;与常规栽培处理相比,水稻接种内生固氮菌后根系活力较强,特别是表现在对根系吸收活跃表面积的影响上;而在水稻生长后期,2种固氮菌的固氮能力增强,造成水稻植株出现明显贪青现象.

Preliminary invocation effects of Endophytic diazotroph on rice

Pot trails and field experiments were conducted to study the effects of two endophytic diazotroph inoculated on rice.The results showed that endophytic diazotroph demonstrated nitrogen fixation ability,promotion of the rice tillers,and increase of rice yield.The inoculation effective of strain Whr50 showed better than that of strain Hwo52.Compared with the control,inoculated rice has strong root activity,especillay impacted the root active absorbing surface area.In the late period of the rice growth,two endophytic diazotroph showed strong nitrogen-fixing ability,causing the rice over-green growth,and the reason of this phenomenon needs further study.