【摘要】 采用野外田间试验，以1 a龄梭梭幼苗为研究对象，设置5种不同剂量保水剂(0 g、1 g、2 g、3 g、4 g),4种栽植深度(20 cm、40 cm、60 cm、80 cm)组合处理，研究不同处理后梭梭的成活率、同化枝相对含水量、光合色素、渗透调节物质、丙二醛(MDA)含量和抗氧化系统活性的变化，旨在探索最适宜梭梭幼苗成活及生长发育的栽植方式。结果表明：(1)施用保水剂、适当增加栽植深度能显著提高梭梭成活率。(2)3 g保水剂处理同化枝相对含水量、叶绿素总含量、叶绿素a含量、叶绿素b含量、CAT活性、POD活性、SOD活性最高，与CK(0 g)相比分别显著增加11.7%、48.5%、45.7%、62.0%、1.4倍、1.6倍、14.1%(P<0.05);3 g保水剂处理的叶绿素a/b、SS、SP、Pro、MDA含量最低，与CK(0 g)相比分别显著降低10.6%、26.6%、28.5%、56.4%、36.8%(P<0.05);60 cm栽植深度处理同化枝的相对含水量、叶绿素总含量、叶绿素a含量、叶绿素b含量、CAT活性、POD活性、SOD活性最高，与20 cm相比分别显著增加6.8%、15.4%、13.4%、24.6%、1.2倍、1.3倍、11.0%(P<0.05)。60 cm栽植深度处理的叶绿素a/b、SS、SP、Pro、MDA含量最低，与20 cm相比分别显著降低10.0%、15.4%、24.3%、47.4%、19.0%(P<0.05)。因此，施用保水剂、适当增加栽植深度能提高梭梭成活率，有利于梭梭幼苗生长发育，其中，3 g保水剂、60 cm栽植深度处理最佳。更多还原

【Abstract】 This study conducted a field experiment using one-year-old Haloxylon ammodendron seedlings to evaluate the effects of planting method on survival and physiological characteristics. Five application rates of super-absorbent polymer(0 g, 1 g, 2 g, 3 g, 4 g) were combined with four planting depths(20 cm, 40 cm, 60 cm, 80 cm). Measurements included survival rate, relative water content of assimilating branches, photosynthetic pigments, osmoregulatory substances, malondialdehyde(MDA) content, and antioxidant enzyme activities. The aim was to identify optimal planting practices for improving the survival and growth of H.ammodendron seedlings.The results showed that:(1) Application of super-absorbent polymer and increased planting depth significantly improved seedling survival.(2) Among super-absorbent polymer treatments, 3 g resulted in the highest values of relative water content, total chlorophyll, chlorophyll a, chlorophyll b, and the activities of catalase(CAT),peroxidase(POD),and superoxide dismutase(SOD),with respective increases of 11.7%,48.5%,45.7%, 62.0%,1.4-fold, 1.6-fold, and 14.1% compared to the control(0 g)(P<0.05). Conversely, the 3 g treatment showed significantly lower values for the chlorophyll a/b ratio, soluble sugar(SS),soluble protein(SP),proline(Pro),and MDA content, decreasing by 10.6%,26.6%,28.5%,56.4%,and 36.8%,respectively(P<0.05). Regarding planting depth, the 60 cm treatment exhibited optimal physiological performance, with relative water content, total chlorophyll, chlorophyll a, chlorophyll b, CAT,POD,and SOD increasing by 6.8%,15.4%,13.4%,24.6%,1.2-fold, 1.3-fold, and 11.0%,respectively, compared to the 20 cm depth(P<0.05). The lowest values for chlorophyll a/b ratio, SS, SP, Pro, and MDA were also observed at 60 cm, with respective decreases of 10.0%,15.4%,24.3%,47.4%,and 19.0%(P<0.05). In conclusion, applying 3 g of super-absorbent polymer in combination with a planting depth of 60 cm is the most effective treatment for improving the survival and physiological characteristics of Haloxylon ammodendron seedlings.更多还原