保水剂对梭梭幼苗生长及根系形态的影响

Effect of super absorbent polymer on the growth and root morphology of Haloxylon ammodendron seedlings

以一年生梭梭移栽苗为研究对象,比较了不同浓度的保水剂对土壤水分、梭梭生长特性和根系形态的影响。结果表明,保水剂能够提高土壤含水率,在土壤水分较低时,0.20%浓度的保水剂显著提高了20～40cm土壤含水率;土壤水分较高的4-6月,0.05%浓度的保水剂对梭梭同化枝生长促进显著,土壤水分较低的7-9月,0.20%浓度促进最显著;0.20%浓度的保水剂显著提高了梭梭的株高、冠幅、新生枝长、基径;0.05%和0.20%浓度的保水剂显著提高了梭梭的总表面积和总根长,总表面积较对照分别增加64.65%和125.62%,总根长分别增加81.68%和130.92%。综上,在土壤水分较高的4-6月,最适宜梭梭生长的保水剂浓度为0.05%,在土壤水分较低的7-9月,0.20%浓度的保水剂促进显著。

The effect of different concentrations of super absorbent polymer（SAP） on soil moisture,growth and root morphology of 1-year Haloxylon ammodendron was studied.0.2% SAP significantly increased soil moisture at a depth of 30-40 cm when soil moisture was relatively low.0.05% SAP promoted the growth of assimilating shoots of H.ammodendron,notably from April to June when soil moisture was relatively high,but 0.2% SAP had the most obvious effect from July to September when soil moisture was relatively low.The height,crown width,new branch length,and basal diameter of H.ammodendron were significantly improved when the SAP concentration was 0.2%.Both 0.05% and 0.2% SAP concentrations significantly improved root surface area by 64.65% and 125.62% respectively and total root length by 81.68% and 130.92%.It was concluded that the optimal SAP concentration for H.ammodendron growth was 0.05% from April to June,and 0.2% from July to September.