Effect of exogenous silicon treatment on seedling growth of different pumpkin rootstocks
In order to clarify the effect of silicon on the seedling growth of different pumpkin rootstocks,three pumpkin rootstocks with different abilities of removing cucumber wax pollen(B04,B07 as the dewaxing powder materials,B06 as the non dewaxing powder material)were used as the test materials.The exogenous silicon(Na2SiO3·5 H2O)treatment was carried out with seven concentration gradients(0,0.3,0.6,0.9,1.2,1.8,2.4 mmol·L-1)using hydroponic cultivation in an artificial climatic chamber.The growth indexes and silicon content were determined and analyzed when the seedlings grew to four leaves and one heart.The results showed that the seedling biomass and root growth potential of the non-dewaxed powder material were higher than those of the dewaxed powder material.The exogenous silicon treatment lower than 1.2 mmol·L-1 promoted the seedling biomass and root growth potential,with 0.9 mmol·L-1 having the most significant promotion effect.The treatment of 1.8 mmol·L-1 had an inhibitory effect on the dewaxed powder material,while promoting the growth potential of the non-dewaxed powder material.The exogenous silicon treatment of 2.4 mmol·L-1 had a significant inhibitory effect on the three materials,but the tolerance of the non-dewaxed powder material to the high concentration of exogenous silicon was stronger than that of the dewaxed powder material.The silicon content of seedlings aboveground and underground increased with the increase of exogenous silicon concentration,but the silicon content of aboveground was always higher than that of underground,and the silicon content of non-dewaxed powder material was higher than that of dewaxed powder material.In summary,the effect of exogenous silicon on the growth of pumpkin seedlings was characterized by promotion at low concentration and inhibition at high concentration,and the tolerance of pumpkin materials with different dewaxing powder ability to high concentration of exogenous silicon treatment was different.
万方数据
维普
