您好，欢迎访问吉林省农业科学院 机构知识库！
吉林省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Soil saline-alkali heterogeneity is an important factor driving the spatial expansion of clonal plant in grassland

文献类型： 外文期刊

作者： Qu, Luhao 1 ; Liu, Jun 1 ; Yang, Jiyun 2 ; Bai, Long 2 ; Huang, Yue 3 ; Lu, Nan 4 ; Yu, Hongzhu 1 ; Wang, Zhifeng 1 ; Li, Zhonghe 1 ;

作者机构： 1.Jilin Acad Agr Sci, Changchun, Peoples R China

2.Shenyang Agr Univ, Coll Hort, Shenyang, Peoples R China

3.Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Minist Educ, Changchun, Peoples R China

4.Grassland Adm, Cent South Inventory & Planning Inst Natl Forestry, Changsha, Peoples R China

关键词： saline-alkali heterogeneity; clipping; spatial expansion; rhizome bud; morphological plasticity

期刊名称：FRONTIERS IN ENVIRONMENTAL SCIENCE （ 影响因子：4.6； 五年影响因子：5.3 ）

ISSN：

年卷期： 2023 年 10 卷

页码：

收录情况： SCI

摘要： Soil salinity is well known heterogeneous and various within natural soil environment. In Songnen grassland of Northeast China, grazing aggravates the saline-alkali heterogeneity in soil habitat, which led to dominant clonal plant species forming a variety of adaptive strategies. However, based on the previous studies of morphological plasticity and clonal integration in clonal plants, there was a lack of mechanism research on the spatial expansion strategy of clonal plants population subjected to clipping in saline-alkali heterogeneity soil patches. To address this knowledge gap, we carried out an experiment by applying different clipping intensities (0%, 35%, 70% of the above-ground biomass removed) to explore the spatial expansion strategy and morphological plasticity of Leymus chinensis and their belowground rhizomes in different heterogeneous saline-alkali patches. We found that, clipping significantly decreased the plant average height and above-ground biomass in homogeneous patches, especially heavy clipping had a significant adverse impact on plant belowground (rhizome, fine root) biomass and leaf area. However, there was no significant difference in the biomass, average height, and leaf area among the clipping treatments in low saline-alkali heterogeneous patches. In addition, the number of leaves, daughter plants and rhizome internode buds were significantly affected by saline-alkali heterogeneity alone, and low saline-alkali heterogeneity had a positive effect on these parameters. Biomass accumulation and rhizome expansion were gradually inhibited by the increasing of clipping intensity in a homogeneous environment, but the inhibitory effect of clipping was not significant in saline-alkali patches soil. We concluded that L. chinensis can respond to grazing or mowing disturbance by increasing tiller and daughter-plant numbers in a saline-alkali heterogeneous environment. The saline-alkali patches promoted clonal plant population spatial expansion more than grazing or mowing disturbance did. This study emphasizes saline-alkali heterogeneity distribution patterns in grassland soil environment were the primary and important driving factor promoting the spatial expansion of L. chinensis.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：吉林省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台