欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2022, Vol. 41 ›› Issue (11): 2137-2144.doi: DOI:10.13292/j.1000-4890.202211.009

• 研究报告 • 上一篇    下一篇

伊犁河谷苦豆子不同扩散阶段土壤盐分离子特征

刘淑琪1,2,崔东1,2,3*,顾杰1,2,刘文新1,2,赵阳1,2


  

  1. 1伊犁师范大学资源与生态研究所, 新疆伊宁 835000; 2伊犁师范大学生物与地理科学学院, 新疆伊宁 835000; 3中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室, 乌鲁木齐 830011)

  • 出版日期:2022-11-10 发布日期:2022-12-06

The characteristics of soil salt ions under different diffusion stages of Sophora alopecuroides in the Yili River valley.

LIU Shu-qi1,2, CUI Dong1,2,3*, GU Jie1,2, LIU Wen-xin1,2, ZHAO Yang1,2#br#

#br#
  

  1. (1Institute of Resources and Ecology, Yili Normal University, Yining 835000, Xinjiang, China; 2 College of Biology and Geography Sciences, Yili Normal University, Yining 835000, Xinjiang, China; 3State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China).


  • Online:2022-11-10 Published:2022-12-06

摘要: 为了探讨苦豆子分布与土壤盐分离子的相互关系,以伊犁河谷苦豆子(Sophora alopecuroides)不同扩散阶段的土壤和裸地、狗牙根(Cynodon dactylon)、伊犁蒿(Seriphidium transillense)、白羊草(Bothriochloa ischaemum)土壤为对象,分析不同土层深度土壤盐分离子(阳离子:Na+、Ca2+、Mg2+和K+;阴离子:HCO3-、CO32-、Cl-、SO42-)的垂直分布规律、离子比及不同离子之间的相关性。结果表明:伊犁河谷不同扩散阶段苦豆子土壤全盐含量随着苦豆子扩散程度的增加而降低;表层土(0~30 cm)的含盐量大于下层土(30~60 cm),表明苦豆子覆盖下的土壤盐分具有表聚特征。土壤剖面盐分离子分布不均匀,总体表现为:Na+>K+>Cl->SO42->Ca2+>Mg2+>HCO3-,未检测到CO32-。从Na+/Ca2+、Na+/Mg2+、Na+/K+来看,苦豆子根际土壤Na+的富集程度最高,苦豆子对Na+的吸收率低于Ca2+、Mg2+、K+。全盐与其他离子之间均呈现出显著相关性(P<0.05)。研究表明,盐分浓度越高的土壤,苦豆子的扩散程度越低。研究结果为伊犁河谷草原苦豆子的管控提供科学依据。


关键词: 干旱地区, 毒害草, 根际土, 特征分析, 垂直分布

Abstract:

To explore the relationship between the distribution of Sophora alopecuroides and soil salt ions, we analyzed the vertical distributions of ions (cations: Na+, Ca2+, Mg2+, and K+; anions: HCO3-, CO32-, Cl- and SO42-), ion ratios in different soil layers, and the correlations between the ion concentrations of soils beneath S. alopecuroides with different coverage, Cynodon dactylon, Bothriochloa ischaemum, and Bothriochloa ischaemum in Yili River valley. The results showed that total salt content of soil beneath S. alopecuroides decreased with increasing S. alopecuroides coverage. Total salt content of topsoil (0-30 cm) was higher than that of subsoil (30-60 cm), suggesting that salt had the characteristics of surface accumulation in soils beneath S. alopecuroides. The distribution of salt ions across the soil profile was uneven, which was overall as follows: Na+>K+>Cl->SO42->Ca2+>Mg2+>HCO3-, with CO32- being not detected. The Na+/Ca2+, Na+/Mg2+, and Na+/K+ ratios indicated highest enrichment degree of Na+ in rhizosphere soil of S. alopecuroides. The uptake rate of Na+ by S. alopecuroides was lower than that of Ca2+, Mg2+, and K+. There were significant correlations between total salt and other ions (P<0.05). Our results indicated that the higher the salt concentration, the lower the S. alopecuroides coverage, providing a theoretical basis for the management and control of S. alopecuroides in Yili River valley grassland.


Key words: arid region, poisonous grass, rhizosphere soil, feature analysis, vertical distribution.