Influence Of Silicon On Photosynthetic Characteristics And Morphological Indexes Of Four Kinds Of Echinochloa Crusgalli

Echinochloa crusglli is an annual herb,is the most difficult to remove paddy weeds.In recent years,a large number of studies show that adding new paddy fertilizer,can significantly improve the hybrid rice yield and improve rice resistance effect.But the impact on the effect of silicon fertilizer on rice growth is less,especially on the response mechanism of different kinds of Echinochloa crusglli on different level under the treatment of silicon is less and less.The test set of four main paddy fields in Northeast China(common Echinochloa crusglli Echinochloa crusglli i and rice Echinochloa crusglli,Echinochloa crusglli,barnyard grass),divided into three stages(tillering,flowering,fruiting),three different silicon processing gradient:Make comparison of Sil(100kg·hm-2)?Si2:(200kg·hm-2)?(S13:400kg·hm-2),Through four kinds of different silicon under the treatment of barnyard grass to plant height,leaf index,stem and panicle index index,photosynthetic indexes and biomass was determined during the grain filling period of The growth mechanism of Echinochloa crusglli in different silicon concentrations.The main results are as follows:(1)the tillering rice and barnyard grass paspalum were high in 200kg-hm-2 and 400kg-hm-2 silicon concentration increased significantly.Rice Paspalum plantheight in 400kg-hm-2 silicon concentration reaches the maximum,silicon fertilizer in flowering plant height on the growth of Echinochloa crusglli was promoted,promoted in seeding stage.(2)application of silicon on Echinochloa crusglli and rice tillering common paspalum number has inhibitory effect,with silicon concentration increased tiller number of rice and barnyard grass paspalum were increased with silicon concentration increased first and then decreased,and reached the maximum at 200kg·hm-2 silicon concentration.The silicon concentration in the 200kg·hm-2 four at tillering angle in fruiting stage of Echinochloa crusglli increased degree were significant,and the plant characteristics in the compact range.(3)four in the total number of leaves during grain filling of barnyard grass compared to Echinochloa crusglli Echinochloa>>>rice Echinochloa crusglli common barnyard grass,the total number of leaves of rice and Echinochloa crusglli were long with atfirstincreasedandthendecreased increase the concentration of silicon silicon,different degrees of inhibition of ordinary Echinochloa crusglli and Echinochloa crusglli leaf growth.Silicon fertilizer in three periods were significantly inhibits the growth of Echinochloa crusglli leaf area,leaf sheath length of silicon fertilizer,rice and b Echinochloa crusglli long promotes the growth in 200kg·hm-2 were significant when the concentration of silicon,silicon fertilizer on Echinochloa crusglli have different degrees of inhibition.(4)the length of the ordinary Echinochloa crusglli,Echinochloa crusglli and barnyard grass stems in filling stage increased with the increased first and then decreased with increasing silicon concentration,Echinochloa crusglli and barnyard grass stems between the length of filling period were 200kg·hm-2 silicon concentration reached the maximum.Silicon fertilizer inhibited the rice tillering stem length between the growth of Echinochloa crusglli.Silicon fertilizer promoted the growth of stem diameter of common barnyard grass and barnyard grass.(5)during the grain filling period of rice and Echinochloa crusglli long panicles with atfirstincreasedandthendecreased increasing concentrations of Si and 200kg·hm-2 in silicon concentration reached the maximum effective panicle number.When the filling period of silicon fertilizer significantly inhibited the effective panicle number of ordinary grass.Duringthe grain filling period 400kg·hm-1 silicon concentration significatly promoted Echinochloa crusglli panicles growth.In the flowering and fruiting stage,rice and Echinochloa crusglli with long panicle length increased first and then decreased with increasing silicon concentration of silicon,different degree of promoting rice and Echinochloa crusglli long panicle elongation,and 200kg·hm-2 in silicon concentration reaches the longest.Silicon fertilizer during the grain filling period significantly reduced the Echinochloa crusglli ear length.(6)the number of ordinary two tiller Echinochloa crusglli,barnyard grass and rice millet increased with the increase of silicon content and increased first and then decreased,common barnyard grass and barnyard grass in most 200kg·hm-2 two grade silicon concentration tillers,silicon fertilizer in seeding stage on Echinochloa crusglli promoting effect is not obvious.Two tiller angle four growth differences,common Echinochloa crusglli>>Echinochloa crusglli Echinochloa crusglli i>long rice.In the filling stage,rice and Echinochloa crusglli and two tiller angle with the increase of silicon concentration increased first and then decreased,silicon fertilizer on ordinary barnyard grass did not have obvious promoting effect.(7)rice and barnyard grass Paspalum Ci and Pn values increased with silicon concentration increased and then decreased,reached the maximum peak at 200kg · hm-2 silicon concentration,rice and barnyard grass Paspalum Tr value increased with silicon concentration decreased and then increased,reached the most hours in 200 kg · hm-2 silicon concentration when.In general the Ci value and Pn value of Echinochloa crusglli with thick silicon increased gradually,reached the maximum at 400 kg · hm-2 silicon concentration.Silicon fertilizer on Echinochloa crusglli Ci value and Pn value have different degrees of inhibition.(8)morphological index by interspecific differences influence,common barnyard grass height and rice and Echinochloa crusglli Echinochloa compared were significant,the total number of leaves more than ordinary rice and b Echinochloa crusglli showed no difference between significant,leaf area of Echinochloa crusglli and other three kinds of Echinochloa crusglli were highly significant.The photosynthetic characteristics of the species has little effect on interspecific differences in net photosynthetic rate of the light of barnyard grass and rice and barnyard Echinochloa crusglli were significant.The biomass of fruiting period was affected greatly by biomass except fruit biomass.