保水剂对千里光种子萌发及幼苗生长的影响研究

为探明保水剂对千里光(Senecio scandens)种子萌发、幼苗生长的影响以及最佳使用量,采用室内盆栽试验,研究了5个梯度的保水剂浓度[0(CK)、0.10%、0.20%、0.30%、0.40%]对千里光种子萌发及幼苗生长的影响。试验结果表明,添加适宜浓度的保水剂可提高千里光种子发芽率,最佳保水剂浓度为0.30%,较对照提高了7.62%。添加保水剂可以提升千里光幼苗生物量、株高与根系长度,株高随保水剂浓度增加呈先增加后下降趋势,根系长度随保水剂浓度增加而增加,在0.40%浓度处理达到最大值。在采用千里光进行绿化时建议加入浓度为0.30%的保水剂,有利于提高其成活率及绿化效果。

Effect of Super Absorbent Polymer on Seed Germination and Seedling Growth of Senecio scandens

The indoor pot experiment with 5 gradients of super absorbent polymer concentration(0,0.10%,0.20%,0.30%,0.40%)was conducted to determine the effect of super absorbent polymer on seed germination and seedling growth of Senecio scandens.The results showed that the suitable concentration of super absorbent polymer could improve the germination rate of Senecio scandens seeds,and the optimal super absorbent polymer was 0.30%and the values increased by 7.62%compared with that of the CK.The application of super absorbent polymer improved the biomass,plant height and root length of Senecio scandens seedlings.The plant height increased first and then decreased with the increase of super absorbent polymer concentration while the root length increased with the increase of super absorbent polymer concentration and reached the maximum at the concentration of 0.40%.It was suggested to add 0.30%super absorbent polymer when using Senecio scandens for greening,which was beneficial to improve the survival rate and greening effect.