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Straw interlayer improves sunflower root growth: Evidence from moisture and salt migration and the microbial community in saline-alkali soil

文献类型： 外文期刊

作者： Chen, Mengmeng 1 ; Wang, Guoli 1 ; Jing, Yupeng 2 ; Zhou, Jie 3 ; Song, Jiashen 1 ; Chang, Fangdi 1 ; Yu, Ru 1 ; Wang, Jing 1 ; Wang, Weini 4 ; Sun, Xia 4 ; Zhang, Hongyuan 1 ; Li, Yuyi 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

2.Inner Mongolia Acad Agr & Anim Husb Sci, Hohhot 010031, Peoples R China

3.Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China

4.Ordos Agr & Anim Husb Ecol & Resource Protect Ctr, Ordos 017001, Peoples R China

关键词： saline-alkali soil; rhizobox; soil water; soil salt content; bacterial community

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.4； 五年影响因子：4.8 ）

ISSN： 2095-3119

年卷期： 2024 年 23 卷 11 期

页码：

收录情况： SCI

摘要： A straw interlayer added to soil can effectively reduce soil salinity effects on plant growth, however, the effects of soil moisture, salt and microbial community composition on plant growth under a straw interlayer are unclear. A rhizobox study was conducted to investigate the role of straw interlayer thickness on soil moisture, salt migration, microbial community composition, as well as root growth in sunflower. The study included four treatments: Control (no straw interlayer); S3 (straw interlayer of 3.0 cm); S5 (straw interlayer of 5.0 cm); S7 (straw interlayer of 7.0 cm). Straw interlayer treatments increased soil moisture by 8.2-11.0% after irrigation and decreased soil salt content after the bud stage in 0-40 cm soil. Total root length, total root surface area, average root diameter, total root volume and the number of root tips of sunflower plants were higher under straw interlayer treatments than in the control, and were the highest under the S5 treatment. This stimulated root growth was ascribed to the higher abundance of Chloroflexi and Verrucomicrobia bacteria in soil with a straw interlayer, which was increased by 55.7 and 54.7%, respectively, in the S5 treatment. Addition of a straw interlayer of 5 cm thickness is a practical and environmentally feasible approach for improving sunflower root growth in saline-alkali soil.

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