Effects of Urea Solution with Different Nitrogen Content on the Seed Germination of Eclipta prostrata

In order to study the effects of urea on the seed germination of Eclipta prostrata L.,E.prostrata seeds were treated with different nitrogen content.Experimental results may be summarized as follows: When nitrogen content was 0.2 g/L,urea solution had certain promoting effect on the germination of Eclipta prostrata seeds.Furthermore,germination percentage decreased with the increase of nitrogen concentration above 0.2 g/L.When the urea content was below 1.0 g/L,there were no significant effects on the germination of Eclipta prostrata.But when the urea content was increased to more than 1.0 g/L,seed germination was obviously inhibited.