保水剂对梭梭（Haloxylon ammodendron）、白梭梭（Haloxylon persicum）种子萌发及幼苗根系的影响

在盆栽条件下，研究保水剂对梭梭（Haloxylon ammodendron）、白梭梭（Haloxylon persicum）种子萌发和幼苗根系形态的影响。结果表明：0.05%浓度的保水剂对梭梭、白梭梭种子萌发有明显的促进作用，发芽率较对照分别提高了18.7%和24.0%；0.05%浓度的保水剂能够抑制梭梭幼苗根系的垂直生长，有效促进侧根数量的增加和根系生物量的积累；0.1%浓度保水剂处理下，白梭梭的主根长度、侧根数量、根系生物量均达到最大；保水剂浓度达到0.2%时，梭梭、白梭梭种子萌发和幼苗根系的生长均受到抑制，表明梭梭幼苗生长最适宜的保水剂浓度为0.05%，白梭梭的浓度以0.05%～0.1%为宜。

Effect of Super Absorbent Polymer on Seed Germination and Seedling Roots of Haloxylon ammodendron and H. persicum

Effect of super absorbent polymer (SAP) on the seed germination and seedling root morphology of Haloxylon ammodendron and H. persicum  was investigated based on a pot experiment. The results showed that, compared with the contrast, the seed germination rates of H. ammodendron and H. persicum were increased by 18.7% and 24.0% respectively when SAP concentration was 0.05%. Vertical growth of seedling roots of H. ammodendron  was inhibited, while the growth and biomass accumulation of lateral roots were promoted when SAP concentration was 0.05%. Root length, lateral root number and root biomass of H. persicum all reached their maximum values at 0.1% SAP concentration. Seed germination and seedling root growth were all inhibited when SAP concentration was 0.2%. It was concluded that the perfect SAP concentration for H. ammodendron growth was 0.05%,and the best effect of SAP concentration for H. persicum varied in a range of 0.05%-0.1%.