沙埋深度对沙木蓼幼苗出土、生长及生理特性的影响

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引用格式：，等.沙埋深度对沙木蓼幼苗出土、生长及生理特性的影响[J].草地学报，2025，33（12）：4191-4199 JIN Min，HECai，HUFang，etal. Effcts of Sand Burial Depth on Seedling Emergence，Growth and Physiological Characteristics of Atraphaxis bracteata[J].Acta Agrestia Sinica，2O25，33（12） ：4191-4199

中图分类号：S812.2 文献标识码：A 文章编号：1007-0435（2025）12-4191-09

Effects of Sand Burial Depth on Seedling Emergence，Growth and Physiological Characteristicsof Atraphaxis bracteata

JIN Min，HE Cail，HUFang，LIU Yuan，LIU Wei， ZHAO Lian-xin，WUYuan， DONG Cun-yuan，ZHANG Qin-de （1.WuweiAcademyofForestry，Wuwei，GansuProvince733OOo，China; 2.College ofForestry，Gansu Agricultural University，Lanzhou，Gansu Province 73Oooo，China）

Abstract：In order to understand the effects of sand burial on seedling emergence，seedling growth and physiological characteristics of Atraphaxis bracteata，the seeds of A .bracteata were used as research materials，the changes of emergence percentage of seeds and seedling growth characteristics such as seedling height，as wellas physiological indicators like osmotic adjustment substance content were studied atsand burial depths of O，0.5， 1，2，3，5 and 7cm . The results showed that A . bracteata seeds were able to emerge under sand burial depths of 0-5cm ，but not at depth of 7cm ；With the increase of sand burial depth，the emergence percentage first rised and then decreased，and the emergence percentage and growth indicators werethe highest at the burial depth of 2cm ；The MDA content in each treatment decreased to varying degrees compared to 0cm burial depth treatment.Three osmoregulatory substances showed a trend of first decreasing and then increasing，then decreasing and then increasing again，demonstrated a synergistic regulation characteristic.The antioxidant enzyme activity exhibited a synergistic effect of pairwise combinations under different sand burial treatments.The appropriate burial depth for the emergence of A . bracteata seeds was 1-2cm ，which was beneficial for the growth of seedlings.Shallow or deep burial depth caused a certain degree of stress on seedlings. The seedlings of A . bracteata maintained normal growth through coordinated changes in osmoregulatory substances and antioxidant enzymes. Key words：Atraphaxis bracteata ;Sand burial;Emergence of seedlings;Growth;Physiology

在干旱荒漠区，风沙活动濒繁，沙埋已成为植被定植、生长和繁衍的关键制约因素[1]。（剩余17524字）